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| ADM6995L 5 port 10/100 Mb/s Single Chip Ethernet Switch Controller Data Sheet Version 1.0 ADMtek.com.tw Information in this document is provided in connection with ADMtek products. ADMtek may make changes to specifications and product descriptions at any time, without notice. Designers must not rely on the absence or characteristics of any features or instructions marked "reserved" or "undefined". ADMtek reserves these for future definition and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future changes to them The products may contain design defects or errors know as errata, which may cause the product to deviate from published specifications. Current characterized errata are available on request. To obtain the latest documentation please contact your local ADMtek sales office or visit ADMtek's website at http://www.ADMtek.com.tw *Third-party brands and names are the property of their respective owners. Copyright 2003 by ADMtek Incorporated All Rights Reserved. ADMtek Inc. About this Manual General Release Intended Audience ADMtek's Customers V1.0 Structure This Data sheet contains 6 chapters Chapter 1 Chapter 2 Chapter 3 Chapter 4. Chapter 5. Chapter 6. Product Overview Interface Description Function Description Register Description Electrical Specification Packaging Revision History Date 13 Nov 2003 Version 1.0 Change 1. First release of ADM6995L Customer Support ADMtek Incorporated, 2F, No.2, Li-Hsin Rd., Science-based Industrial Park, Hsinchu, 300, Taiwan, R.O.C. Sales Information Tel + 886-3-5788879 Fax + 886-3-5788871 ADMtek Inc. V1.0 Table of Contents Chapter 1 Product Overview ........................................................................................ 1-1 1.1 Overview.......................................................................................................... 1-1 1.2 Features ............................................................................................................ 1-2 1.3 Block Diagram ................................................................................................. 1-3 1.4 Abbreviations................................................................................................... 1-3 1.5 Conventions ........................................................................................................... 1-5 1.5.1 Data Lengths............................................................................................ 1-5 1.5.2 Pin Types.................................................................................................. 1-5 1.5.2 Register Types.......................................................................................... 1-5 Chapter 2 Interface Description ................................................................................... 2-1 2.1 Pin Diagram ..................................................................................................... 2-1 2.2 Pin Description by Function ............................................................................ 2-2 2.2.1 Twisted Pair Interface.............................................................................. 2-2 2.2.2 Setting ...................................................................................................... 2-2 2.2.3 LED Interface........................................................................................... 2-3 2.2.4 EEPROM/Management Interface ............................................................ 2-4 2.2.5 Power/Ground, 48 pins............................................................................ 2-4 2.2.6 MISC ........................................................................................................ 2-5 Chapter 3 Function Description ................................................................................... 3-1 3.1 Functional Descriptions ................................................................................... 3-1 3.2 10/100M PHY Block ....................................................................................... 3-1 3.3 100Base-X Module .......................................................................................... 3-1 3.4 100Base-X Receiver ........................................................................................ 3-1 3.4.1 A/D Converter.......................................................................................... 3-2 3.4.2 Adaptive Equalizer and timing Recovery Module ................................... 3-3 3.4.3 NRZI/NRZ and Serial/Parallel Decoder.................................................. 3-3 3.4.4 Data De-scrambling................................................................................. 3-3 3.4.5 Symbol Alignment .................................................................................... 3-3 3.4.6 Symbol Decoding ..................................................................................... 3-3 3.4.7 Valid Data Signal..................................................................................... 3-4 3.4.8 Receive Errors ......................................................................................... 3-4 3.4.9 100Base-X Link Monitor.......................................................................... 3-4 3.4.10 Carrier Sense ........................................................................................... 3-4 3.4.11 Bad SSD Detection................................................................................... 3-5 3.4.12 Far-End Fault .......................................................................................... 3-5 3.5 100Base-TX Transceiver ................................................................................. 3-5 3.5.1 Transmit Drivers...................................................................................... 3-5 3.5.2 Twisted-Pair Receiver.............................................................................. 3-6 3.6 10Base-T Module............................................................................................. 3-6 3.6.1 Operation Modes ..................................................................................... 3-6 3.6.2 Manchester Encoder/Decoder ................................................................. 3-6 3.6.3 Transmit Driver and Receiver ................................................................. 3-7 3.6.4 Smart Squelch .......................................................................................... 3-7 3.7 Carrier Sense.................................................................................................... 3-7 3.8 Jabber Function................................................................................................ 3-7 ADM6995L i ADMtek Inc. 3.9 Link Test Function........................................................................................... 3-8 3.10 Automatic Link Polarity Detection.............................................................. 3-8 3.11 Clock Synthesizer ........................................................................................ 3-8 3.12 Auto Negotiation.......................................................................................... 3-8 3.13 Memory Block ............................................................................................. 3-9 3.14 Switch Functional Description..................................................................... 3-9 3.15 Basic Operation............................................................................................ 3-9 3.15.1 Address Learning ................................................................................... 3-10 3.15.2 Address Recognition and Packet Forwarding ....................................... 3-10 3.15.3 Address Aging ........................................................................................ 3-10 3.15.4 Back off Algorithm ................................................................................. 3-11 3.15.5 Inter-Packet Gap (IPG) ......................................................................... 3-11 3.15.6 Illegal Frames........................................................................................ 3-11 3.15.7 Half Duplex Flow Control ..................................................................... 3-11 3.15.8 Full Duplex Flow Control...................................................................... 3-11 3.15.9 Broadcast Storm filter............................................................................ 3-11 3.16 Auto TP MDIX function................................................................................ 3-12 3.17 Port Locking............................................................................................... 3-12 3.18 VLAN setting & Tag/Untag & port-base VLAN ...................................... 3-12 3.19 Priority Setting ........................................................................................... 3-13 3.20 LED Display .............................................................................................. 3-14 Chapter 4 Register Description .................................................................................... 4-1 4.1 EEPROM Content............................................................................................ 4-1 4.2 EEPROM Register Map................................................................................... 4-1 4.3 EEPROM Register ........................................................................................... 4-2 4.3.1 Signature Register, offset: 0x00h.............................................................. 4-2 4.3.2 Configuration Registers, offset: 0x01h ~ 0x09h ...................................... 4-3 4.3.3 Reserved Register, offset: 0x0ah.............................................................. 4-3 4.3.4 Configuration Register, offset: 0x0bh...................................................... 4-4 4.3.5 Reserved Register, offset: 0x0ch~0x0dh .................................................. 4-4 4.3.6 VLAN priority Map Register, offset: 0x0eh ............................................. 4-4 4.3.7 TOS priority Map Register, offset: 0x0fh................................................. 4-4 4.3.8 Packet with Priority: Normal packet content .......................................... 4-5 4.3.9 VLAN Packet............................................................................................ 4-5 4.3.10 TOS IP Packet.......................................................................................... 4-6 4.3.11 Miscellaneous Configuration Register, offset: 0x10h.............................. 4-6 4.3.12 VLAN mode select Register, offset: 0x11h............................................... 4-7 4.3.13 Miscellaneous Configuration register, offset: 0x12h .............................. 4-7 4.3.14 VLAN mapping table registers, offset: 0x22h ~ 0x13h ............................ 4-8 4.3.15 Reserved Register, offset: 0x27h ~ 0x23h................................................ 4-8 4.3.16 Port0 PVID bit 11 ~ 4 Configuration Register, offset: 0x28h ................. 4-8 4.3.17 Port1 PVID bit 11 ~ 4 Configuration Register, offset: 0x29h ................. 4-8 4.3.18 Port2 PVID bit 11~4 Configuration Register, offset: 0x2ah ................... 4-9 4.3.19 Port3, 4 PVID bit 11~4 Configuration Register, offset: 0x2bh ............... 4-9 4.3.20 VLAN group shift bits Configuration Register, offset: 0x2ch .................. 4-9 4.3.21 Reserved Register, offset: 0x2dh.............................................................. 4-9 V1.0 ADM6995L ii ADMtek Inc. 4.3.22 Reserved Register, offset: 0x2eh ............................................................ 4-10 4.3.23 PHY Restart, offset: 0x2fh...................................................................... 4-10 4.3.24 Miscellaneous Configuration Register, offset: 0x30h............................ 4-10 4.3.25 Bandwidth Control Register0~3, offset: 0x31h...................................... 4-10 4.3.26 Bandwidth Control Register 4~5, offset: 0x32h..................................... 4-11 4.3.27 Bandwidth Control Enable Register, offset: 0x33h ................................ 4-11 4.4 EEPROM Access ........................................................................................... 4-12 4.5 Serial Register Map........................................................................................ 4-13 4.6 Serial Register Description ............................................................................ 4-15 4.6.1 Chip Identifier Register, offset: 0x00h................................................... 4-15 4.6.2 Port Status 0 Register, offset: 0x01h ..................................................... 4-15 4.6.3 Port Status 1 Register, offset: 0x02h ..................................................... 4-17 4.6.4 Cable Broken Status Register, offset: 0x03h.......................................... 4-17 4.6.5 Over Flow Flag 0 Register, offset: 0x3ah.............................................. 4-17 4.6.6 Over Flow Flag 0: Register 0x3bh ........................................................ 4-18 4.6.7 Over Flow Flag 2 Register, offset: 0x3ch.............................................. 4-18 4.7 Serial Interface Timing .................................................................................. 4-20 Chapter 5 Electrical Specification................................................................................ 5-1 5.1 TX/FX Interface............................................................................................... 5-1 5.1.1 TP Interface ............................................................................................. 5-1 5.1.2 FX Interface ............................................................................................. 5-1 5.2 DC Characteristics ........................................................................................... 5-2 5.2.1 Absolute Maximum Rating....................................................................... 5-2 5.2.2 Recommended Operating Conditions ...................................................... 5-2 5.2.3 DC Electrical Characteristics for 3.3V Operation .................................. 5-2 5.3 AC Characteristics ........................................................................................... 5-3 5.3 AC Characteristics ........................................................................................... 5-3 5.3.1 Power On Reset........................................................................................ 5-3 5.3.2 EEPROM Interface Timing...................................................................... 5-3 5.3.3 GPSI(7-wire) Input Timing ...................................................................... 5-4 5.3.4 GPSI(7-wire) Output Timing ................................................................... 5-4 Chapter 6 Packaging...................................................................................................... 6-1 6.1 128 Pin PQFP Outside Dimension................................................................... 6-1 V1.0 ADM6995L iii ADMtek Inc. V1.0 List of Figures Figure 1-1 ADM6995L Block Diagram .......................................................................... 1-3 Figure 2-1 5 TP/FX PORT 128 Pin Diagram .................................................................. 2-1 ADM6995L iv ADM6995L Product Review Chapter 1 Product Overview 1.1 Overview The ADM6995L is a high performance, low cost, highly integrated (Controller, PHY and Memory) five-port 10/100 Mbps TX/FX Ethernet switch controller with all ports supporting 10/100 Mbps Full/Half duplex. The ADM6995L is intended for applications to stand alone bridge for the low cost SOHO market. ADM6995L provides advanced functions such as: 802.1p(Q.O.S.), 802.1q(VLAN), Port MAC address Locking, Management, Port Status, TP Auto-MDIX & 25M Crystal functions to meet customer requests on Switch demands. The ADM6995L also supports Back Pressure in Half-Duplex mode and the 802.3x Flow Control Pause packet in Full-Duplex mode to prevent packet loss when the buffer is full. When Back Pressure is enabled, and there is no receive buffer available for the incoming packet, the ADM6995L will issue a JAM pattern on the receiving port in Half Duplex mode and transmit the 802.3x Pause packet back to the receiving end in Full Duplex mode. The built-in SRAM is used for packet buffering and the address-learning table is divided into 256 bytes/block to achieve the optimized memory utilization through complicated link lists on packets with various lengths. ADM6995L also supports priority features such as Port-Based VLAN and IP TOS field checking. Users can easily set different priority modes in individual ports, through a small low-cost micro controller used to initialize or used on the fly to configure. Each output port supports four queues in the way of fixed N: 1 fairness queuing to fit the bandwidth demand on various types of packets such as Voice, Video and data. 802.1Q, Tag/Untag, and up to 16 groups of VLAN are also supported. An intelligent address recognition algorithm gives ADM6995L the ability to recognize up to 2048 different MAC addresses and enables filtering and forwarding at full wire speed. The port MAC address Locking function is also supported by ADM6995L to use on Building Internet access to prevent multiple users sharing one port traffic. ADMtek Inc. 1-1 ADM6995L Product Review 1.2 Features * * * * * * * * * * * * * * * * * * * Supports five 10M/100M auto-detect Half/Full duplex switch ports with TX/FX interfaces. Supports 2048 MAC addresses table. Supports four queue for QoS Supports priority features by Port-Based, 802.1p VLAN & IP TOS of packets. Supports Store & Forward architecture and performs forwarding and filtering at nonblocking full wire speed. Supports buffer allocation with 256 bytes per block Supports Aging function Enable/Disable. Supports per port Single/Dual color mode with Power On auto diagnostic. Supports 802.3x Flow Control pause packet for Full Duplex in case buffer is full. Supports Back Pressure function for Half Duplex operation in case buffer is full. Supports packet length up to 1522 bytes. Broadcast Storming Filter function. Supports 802.1Q VLAN. Up to 16 VLAN groups is implemented by the last four bits of VLAN ID. 2bit MAC clone to support multiple WAN application Supports TP interface Auto MDIX function for auto TX/RX swap by strapping-pin. Easy Management 32bits smart counter for per port RX/TX byte/packet count, error count and collision count. Support PHY status output for management system. 25M Crystal only for the whole system. 128 QFP package with 0.18um technology. 1.8V/3.3V power supply. ADMtek Inc. 1-2 ADM6995L Product Review 1.3 Block Diagram Embedded Memory LED DISPLAY CONTROL LED Interface Switching Fabric Memory BIST 10/100M MAC 10/100M MAC ... 10/100M MAC 10/100M MAC PORT0 POR T1 POR T2 Twisted Pa ir Interface ... PORTN Data Handler RXP4 RXN4 A/D CONV ERTER DIGITAL EQUALIZER PARTITION HANDLER TXP4 DRIVER TXN4 MLT3 Converter SCRAMBLER TRANSMIT STATE MACHINE BIAS CLOCK GENERATOR Figure 1-1 ADM6995L Block Diagram 1.4 Abbreviations BER CFI COL CRC CRS CS DA DI DO EDI EDO EECS Bit Error Rate Canonical Format Indicator Collision Cyclic Redundancy Check Carrier Sense Chip Select Destination Address Data Input Data Output EEPROM Data Input EEPROM Data Output EEPROM Chip Select ADMtek Inc. 1-3 ADM6995L EESK ESD FEFI FET FLP GND GPSI IPG LFSR MAC MDIX MII NRZI NRZ PCS PHY PLL PMA PMD QoS QFP RST RXCLK RXD RXDV RXER RXN RXP SA SOHO SSD SQE TOS TP TTL TXCLK TXD TXEN TXN TXP EEPROM Clock End of Stream Delimiter Far End Fault Indication Field Effect Transistor Fast Link Pulse Ground General Purpose Serial Interface Inter-Packet Gap Linear Feedback Shift Register Media Access Controller MDI Crossover Media Independent Interface Non Return to Zero Inverter Non Return to Zero Physical Coding Sub-layer Physical Layer Phase Lock Loop Physical Medium Attachment Physical Medium Dependent Quality of Service Quad Flat Package Reset Receive Clock Receive Data Receive Data Valid Receive Data Errors Receive Negative (Analog receive differential signal) Receive Positive (Analog receive differential signal) Source Address Small Office Home Office Start of Stream Delimiter Signal Quality Error Type of Service Twisted Pair Transistor Transistor Logic Transmission Clock Transmission Data Transmission Enable Transmission Negative Transmission Positive Product Review ADMtek Inc. 1-4 ADM6995L Product Review 1.5 Conventions 1.5.1 Data Lengths qword dword word byte nibble 1.5.2 Pin Types Pin Type I O I/O OD SCHE PD PU 1.5.2 Register Types Register Type RO WO RW Description Read-only Write-only Read/Write Description Input Output Bi-directional Open drain Schmitt Trigger internal pull-down internal pull-up 64-bits 32-bits 16-bits 8 bits 4 bits ADMtek Inc. 1-5 ADM6995L Interface Description Chapter 2 Interface Description 2.1 Pin Diagram 101 102 NC NC 100 97 98 99 94 95 96 92 93 88 89 90 91 86 87 83 84 85 80 81 82 79 75 76 77 78 72 73 74 71 68 69 70 66 67 65 GNDO NC LNKACT2 LNKACT1 LNKACT0 GNDIK VCCIK LNKACT3 NC NC LNKACT4 GNDO VCC3O NC EDO CKO25M CFG0 EESK (XOVEN) VCCIK GNDIK EDI (LEDMODE) EECS GNDIK NC NC NC NC VCCIK GNDO VCC3O NC NC NC GND VCCIK PHYAS0 GNDIK GFCEN P4FX NC NC NC LDSPD4 GNDO VCC3O LDSPD3 LDSPD2 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 DUPCOL4 GNDO VCC3O DUPCOL3 DUPCOL2 (BPEN) DUPCOL1 (PHYAS1) DUPCOL0 (RECANEN) VCCIK GNDIK RC XI XO VCCPLL GNDPLL CONTROL VREF GNDBIAS RTX VCCBIAS VCCA2 TXP0 TXN0 GNDA RXP0 RXN0 VCCAD NC NC VCCAD VCCAD RXN2 VCCA2 VCCA2 NC TXP2 VCCA2 VCCA2 VCCA2 NC NC TXN3 TXP3 VCCA2 NC GNDA NC 4 3 RXN1 RXP1 GNDA NC NC GNDA RXP2 GNDA TXN2 GNDA NC NC RXN3 RXP3 GNDA TXN1 TXP1 ADM6995L VCCIK GNDIK LDSPD1 LDSPD0 TEST VCCIK GNDIK GNDO VCCA2 TXP4 TXN4 GNDA RXP4 RXN4 VCCAD NC 10 9 8 11 14 13 12 16 15 17 20 19 18 21 23 22 26 25 24 27 31 30 29 28 34 33 32 35 38 37 36 2 1 6 5 7 Figure 2-1 5 TP/FX PORT 128 Pin Diagram ADMtek Inc. 2-1 ADM6995L Interface Description 2.2 Pin Description by Function ADM6995L pins are categorized into one of the following groups: Section 2.2.1 Twisted Pair Interface Section 2.2.2 Settings Section 2.2.3 LED Interface Section 2.2.4 EEPROM/Management Interface Section 2.2.5 Power/Ground, 48 pins Section 2.2.6 MISC Note: "Section 1.5.2 Pin Types" can be used for reference. 2.2.1 Pin Name RXP[0:4] RXN[0:4] TXP[0:4] TXN[0:4] Twisted Pair Interface Pin# 126, 11, 24, 37, 41 127, 12, 25, 38, 40 123, 8, 21, 34, 44 124, 9, 22, 35, 43 Type I/O, Analog I/O, Analog I/O, Analog I/O, Analog Descriptions Twisted Pair Receive Input Positive. Twisted Pair Receive Input Negative. Twisted Pair Transmit Output Positive. Twisted Pair Transmit Output Negative. 2.2.2 Setting Pin# 63 Type I/O, 8mA PU Descriptions Setting GFCEN: Global Flow Control Enable. At power-on-reset, latched as Full Duplex Flow control setting "1" to enable flow-control (default ), "0" to disable flowcontrol. Port4 FX/TX mode select. Internal pull down. 1: Port4 as FX port. 0: Port4 as TX port. Setting PHYAS0: Chip physical address for multiple chip application on read EEPROM data. Internal pull down. Power on reset value PHYAS0 combines with PHYAS1 PHYAS1 PHYAS0 0 0 Master(93C46) If there is no EEPROM then user must use 93C66 timing to write chip's register. If user put 93C46 with correct Signature then user writes chip register by 93C46 timing. Pin Name GFCEN P4FX 62 I PD I/O 8mA PD PHYAS0 66 ADMtek Inc. 2-2 ADM6995L Pin Name Pin# Type Interface Description Descriptions If user put 93C66 then data put in Bank0. User can write chip register by 93C66 timing. User must assert one SK cycle when CS at idle stage when write chip internal register. 2.2.3 Pin Name LNKACT[4:0] LED Interface Pin# 92, 95, 96, 97, 98 Type O, 8mA Descriptions LINK/Activity LED[4:0]. Active low "1" indicates no link activity on cable "0" indicates link okay on cable, but no activity and signals on idle stage. "Blinking" indicates link activity on cable. Duplex/Collision LED[4:3]. Active low "1" for half-duplex and "blinking" for collision indication "0" for full-duplex indication Duplex/Collision LED2. Active low "1" for half-duplex and "blinking" for collision indication "0" for full-duplex indication Setting BPEN: At power-on-reset, latched as Back Pressure setting "1" to enable Back-Pressure (defaulted), "0" to disable Back Pressure. At power-on-reset, latched as Back Pressure setting "1" to enable Back-Pressure (defaulted), "0" to disable Back Pressure. Duplex/Collision LED1. Active low "1" for half-duplex and "blinking" for collision indication "0" for full-duplex indication Setting PHYAS1: Power on Reset latch value combine with TXEN. Internal pull down. Check pin 66. Duplex/Collision LED0. Active low "1" for half-duplex and "blinking" for collision indication "0" for full-duplex indication Setting ANEN: On power-on-reset, latched as Auto Negotiation capability for all ports. "1" to enable Auto Negotiation ( defaulted by pulled up internally ), "0" to disable Auto Negotiation. Speed LED[4:0]. Used to indicate corresponding port's speed status. "0" for 100Mb/s, "1" for 10Mb/s DUPCOL[4:3] 103, 106 O, 8mA O, 8mA, PU DUPCOL2 107 Setting BPEN DUPCOL1 Setting PHYAS1 108 O, 8mA, PD DUPCOL0 Setting ANEN 109 O, 8mA, PU LDSPD[4:0] 58, 55, 54, 51, 50 O, 8mA ADMtek Inc. 2-3 ADM6995L Interface Description 2.2.4 Pin Name EDO EECS EEPROM/Management Interface Pin# 84 80 Type I, TTL,PU O, 4mA,PD I/O, 4mA PD Descriptions EEPROM Data Output. Serial data input from EEPROM. This pin is internally pull-up. EEPROM Chip Select. This pin is active high chip enable for EEPROM. When RESETL is low, it will be Tri-state. Internally Pull-down Serial Clock. This pin is clock source for EEPROM. When RESETL is low, it will be tri-state. Setting XOVEN: This pin is internal pull-down. On power-on-reset, latched as P4~0 Auto MDIX enable or not. "0" to disable MDIX ( defaulted ), "1" to enable MDIX. Suggest externally pull up to enable MDIX for all ports. EEPROM Serial Data Input. This pin is output for serial data transfer. When RESETL is low, it will be tri-state. Setting LEDMODE: This pin is internal pull-down. On power-onreset, latched as Dual Color mode or not. "0" to set Single color mode for LED. "1" to set Dual Color mode for LED. EECK 81 Setting XOVEN EDI 79 I/O, 4mA PD Setting LEDMODE 2.2.5 Pin Name GNDA Power/Ground, 48 pins Pin# 3, 10, 16, 23, 29, 36, 42, 125 6, 7, 19, 20, 32, 33, 45, 122 13, 26, 39, 128 119 121 116 115 47, 52, 64, 76, 93, 83, 111 48, 53, 65, 75, 82, 94, 110 46, 57, 70, 87, 99, 104 56, 71, 88, 105 69 Type I Descriptions Ground Used by AD Block. VCCA2 I 1.8V, Power Used by TX Line Driver. VCCAD GNDBIAS VCCBIAS GNDPLL VCCPLL GNDIK I I I I I I 3.3V, Power Used by AD Block. Ground Used by Bias Block 3.3V, Power Used by Bias Block. Ground used by PLL 1.8V, Power used by PLL Ground Used by Digital Core VCCIK I 1.8V, Power Used by Digital Core GNDO VCC3O GND I I I Ground Used by Digital Pad 3.3V, Power Used by Digital Pad. Ground Used by Digital Pad. ADMtek Inc. 2-4 ADM6995L Interface Description 2.2.6 MISC Pin Name CKO25M Control RTX VREF RC XI XO CFG0 TEST NC NC Pin# 85 117 Type O, 8mA O Descriptions 25M Clock Output. NC FET Control Signal. The pin is used to control FET for 3.3V to 1.8V regulator. 120 Analog TX Resistor. Add 1.1K %1 resister to GND. 118 Analog Analog Reference Voltage. 112 I, RC Input for Power On reset. Reset input pin. SCHE 113 I, 25M Crystal Input. 25M Crystal Input. Variation is limited Analog to +/- 50ppm. 114 O, 25M Crystal Output. When connected to oscillator, this pin Analog should left unconnected. 86 I, Must Connected to GND. TTL 49 I, TEST Value. TTL At normal application connect to GND. 1, 2, 4,5, 14, 15,17, NC 18, 27,28, 61, 59, 60 I/O, NC. 8mA PD 74, 102, 101, I NC 100, 73, 68, 78, 77, PD 72, 67, 91, 90, 89 ADMtek Inc. 2-5 ADM6995L Function Description Chapter 3 Function Description 3.1 Functional Descriptions The ADM6995L integrates five 100Base-X physical sub-layer (PHY), 100Base-TX physical medium dependent (PMD) transceivers, five complete 10Base-T modules and memory into a single chip for both 10Mbits/s, 100Mbits/s Ethernet switch operation. It also supports 100Base-FX operation through external fiber-optic transceivers. The device is capable of operating in either Full Duplex mode or Half-Duplex mode in 10Mbits/s and 100Mbits/s. Operational modes can be selected by hardware configuration pins, software settings of management registers, or determined by the on-chip auto negotiation logic. The ADM6995L consists of three major blocks: 10/100M PHY Block Switch Controller Block Built-in SSRAM * * * 3.2 10/100M PHY Block The 100Base-X section of the device implements the following functional blocks: * 100Base-X physical coding sub-layer (PCS) * 100Base-X physical medium attachment (PMA) * Twisted-pair transceiver (PMD) * The 100Base-X and 10Base-T sections share the following functional blocks. * Clock synthesizer module * IEEE 802.3u auto negotiation 3.3 100Base-X Module The ADM6995L implements 100Base-X compliant PCS and PMA and 100Base-TX compliant TP-PMD as illustrated in Figure 2. Bypass options for each of the major functional blocks within the 100Base-X PCS provides flexibility for various applications. 100Mbits/s PHY loop back is included for diagnostic purpose. 3.4 100Base-X Receiver The 100Base-X receiver consists of functional blocks required to recover and condition the 125Mbits/s receive data stream. The ADM6995L implements the 100Base-X receiving state machine diagram as given in ANSI/IEEE Standard 802.3u, Clause 24. The 125Mbits/s receive data stream may originate from the on-chip twisted-pair transceiver in a 100Base-TX application. Alternatively, the receive data stream may be generated by an external optical receiver as in a 100Base-FX application. The receiver block consists of the following functional sub-blocks : ADMtek Inc. 3-1 ADM6995L * * * * * * * * * Function Description A/D Converter Adaptive Equalizer and timing recovery module NRZI/NRZ and serial/parallel decoder De-scrambler Symbol alignment block Symbol Decoder Collision Detect Block Carrier sense Block Stream decoder block SDP CLOCK/DATA RECOVERY MII TO RMII CONVERTER ADAPTIVE EQUALIZER 10/100 TX DRIVER FIBER OPTIC DRIVER SERIAL-TO-PARALLEL RXD[1:0] RXD[3:0] 4B/5B DECODER DESCRAMBLER RXP BP_DSCR RXN BP_ALIGN BP_4B5B CRSDV CRS RXDV RXER RX STATE MACHINE 100BASE-X RECEIVER COL TXCLK TXEN RMII TO MII CONVERTER TXEN TXER TXD[3:0] BP_4B5B TX STATE MACHINE MLT-3 STATE MACHINE TXP TXN BP_SCR SCRAMBLER BP_ALIGN PARALLAL-TO-SERIAL 4B/5B DECODER FOTX+ TXD[1:0] FOTX- 100BASE-X TRANSMITTER 3.4.1 A/D Converter High performance A/D converter with 125Mhz sampling rate converts signals received on RXP/RXN pins to 6 bits data streams; besides it possess auto-gain-control capability that will further improve receive performance especially under long cable or harsh detrimental signal integrity. Due to high pass characteristic on transformer, built in baseline-wander correcting circuit will cancel it out and restore its DC level. ADMtek Inc. 3-2 ADM6995L 3.4.2 Function Description Adaptive Equalizer and timing Recovery Module All digital design is especial immune from noise environments and achieves better correlation between production and system testing. Baud rate Adaptive Equalizer/Timing Recovery compensates line loss induced from twisted pair and tracks far end clock at 125M samples per second. Adaptive Equalizer implemented with Feed forward and Decision Feedback techniques meet the requirement of BER less than 10-12 for transmission on CAT5 twisted pair cable ranging from 0 to 120 meters. NRZI/NRZ and Serial/Parallel Decoder The recovered data is converted from NRZI to NRZ. The data is not necessarily aligned to 4B/5B code group's boundary. Data De-scrambling The de-scrambler acquires synchronization with the data stream by recognizing idle bursts of 40 or more bits and locking its deciphering Linear Feedback Shift Register (LFSR) to the state of the scrambling LFSR. Upon achieving synchronization, the incoming data is XORed by the deciphering LFSR and de-scrambled. In order to maintain synchronization, the de-scrambler continuously monitors the validity of the unscrambled data that it generates. To ensure this, a link state monitor and a hold timer are used to constantly monitor the synchronization status. Upon synchronization of the de-scrambler the hold timer starts a 722 us countdown. Upon detection of sufficient idle symbols within the 722 us period, the hold timer will reset and begin a new countdown. This monitoring operation will continue indefinitely given a properly operating network connection with good signal integrity. If the link state monitor does not recognize sufficient unscrambled idle symbols within 722 us period, the de-scrambler will be forced out of the current state of synchronization and reset in order to re-acquire synchronization. 3.4.3 3.4.4 3.4.5 Symbol Alignment The symbol alignment circuit in the ADM6995L determines code word alignment by recognizing the /J/K delimiter pair. This circuit operates on unaligned data from the descrambler. Once the /J/K symbol pair (11000 10001) is detected, subsequent data is aligned on a fixed boundary. Symbol Decoding The symbol decoder functions as a look-up table that translates incoming 5B symbols into 4B nibbles as shown in Table 1. The symbol decoder first detects the /J/K symbol pair preceded by idle symbols and replaces the symbol with MAC preamble. All subsequent 5B symbols are converted to the corresponding 4B nibbles for the duration of the entire packet. This conversion ceases upon the detection of the /T/R symbol pair 3.4.6 ADMtek Inc. 3-3 ADM6995L Function Description denoting the end of stream delimiter (ESD). The translated data is presented on the internal RXD[3:0] signal lines with RXD[0] represents the least significant bit of the translated nibble. 3.4.7 Valid Data Signal The valid data signal (RXDV) indicates that recovered and decoded nibbles are being presented on the internal RXD[3:0] synchronous to receive clock, RXCLK. RXDV is asserted when the first nibble of translated /J/K is ready for transfer over the internal MII. It remains active until either the /T/R delimiter is recognized, link test indicates failure, or no signal is detected. On any of these conditions, RXDV is de-asserted. Receive Errors The RXER signal is used to communicate receiver error conditions. While the receiver is in a state of holding RXDV asserted, the RXER will be asserted for each code word that does not map to a valid code-group. 100Base-X Link Monitor The 100Base-X link monitor function allows the receiver to ensure that reliable data is being received. Without reliable data reception, the link monitor will halt both transmit and receive operations until such time that a valid link is detected. The ADM6995L performs the link integrity test as outlined in IEEE 100Base-X (Clause 24) link monitor state diagram. The link status is multiplexed with 10Mbits/s link status to form the reportable link status bit in serial management register 1h, and driven to the LNKACT pin. When persistent signal energy is detected on the network, the logic moves into a LinkReady state after approximately 500 us, and waits for an enable from the auto negotiation module. When received, the link-up state is entered, and the transmission and reception logic blocks become active. Should auto negotiation be disabled, the link integrity logic moves immediately to the link-up state after entering the link-ready state. 3.4.8 3.4.9 3.4.10 Carrier Sense Carrier sense (CRS) for 100Mbits/s operation is asserted upon the detection of two noncontiguous zeros occurring within any 10-bit boundary of the received data stream. The carrier sense function is independent of symbol alignment. In switch mode, CRS is asserted during either packet transmission or reception. For repeater mode, CRS is asserted only during packet reception. When the idle symbol pair is detected in the received data stream, CRS is de-asserted. In repeater mode, CRS is only asserted due to receive activity. CRS is intended to encapsulate RXDV. ADMtek Inc. 3-4 ADM6995L Function Description 3.4.11 Bad SSD Detection A bad start of stream delimiter (Bad SSD) is an error condition that occurs in the 100Base-X receiver if carrier is detected (CRS asserted) and a valid /J/K set of codegroup (SSD) is not received. If this condition is detected, then the ADM6995L will assert RXER and present RXD[3:0] = 1110 to the internal MII for the cycles hat correspond to received 5B codegroups until at least two idle code-groups are detected. Once at least two idle code groups are detected, RXER and CRS become de-asserted. 3.4.12 Far-End Fault Auto negotiation provides a mechanism for transferring information from the Local Station to the link Partner that a remote fault has occurred for 100Base-TX. As auto negotiation is not currently specified for operation over fiber, the far end fault indication function (FEFI) provides this capability for 100Base-FX applications. A remote fault is an error in the link that one station can detect while the other cannot. An example of this is a disconnected wire at a station's transmitter. This station will be receiving valid data and detect that the link is good via the link integrity monitor, but will not be able to detect that its transmission is not propagating to the other station. A 100Base-FX station that detects such a remote fault may modify its transmitted idle stream from all ones to a group of 84 ones followed by a single 0. This is referred to as the FEFI idle pattern. 3.5 100Base-TX Transceiver ADM6995L implements a TP-PMD compliant transceiver for 100Base-TX operation. The differential transmit driver is shared by the 10Base-T and 100Base-TX subsystems. This arrangement results in one device that uses the same external magnetic for both the 10Base-T and the 100Base-TX transmission with simple RC component connections. The individually wave-shaped 10Base-T and 100Base-TX transmit signals are multiplexed in the transmission output driver selection. 3.5.1 Transmit Drivers The ADM6995L 100Base-TX transmission driver implements MLT-3 translation and wave-shaping functions. The rise/fall time of the output signal is closely controlled to conform to the target range specified in the ANSI TP-PMD standard. ADMtek Inc. 3-5 ADM6995L 3.5.2 Function Description Twisted-Pair Receiver For 100Base-TX operation, the incoming signal is detected by the on-chip twisted-pair receiver that consists of a differential line receiver, an adaptive equalizer and a base-line wander compensation circuits. The ADM6995L uses an adaptive equalizer that changes filter frequency response in accordance with cable length. The cable length is estimated based on the incoming signal strength. The equalizer tunes itself automatically for any cable length to compensate for the amplitude and phase distortions incurred from the cable. 3.6 10Base-T Module The 10Base-T Transceiver Module is IEEE 802.3 compliant. It includes the receiver, transmitter, collision, heartbeat, loop back, jabber, wave shaper, and link integrity functions, as defined in the standard. Figure 3 provides an overview for the 10Base-T module. The ADM6995L 10Base-T module is comprised of the following functional blocks: * Manchester encoder and decoder * Collision detector * Link test function * Transmit driver and receiver * Serial and parallel interface * Jabber and SQE test functions * Polarity detection and correction 3.6.1 Operation Modes The ADM6995L 10Base-T module is capable of operating in either half-duplex mode or full-duplex mode. In half-duplex mode, the ADM6995L functions as an IEEE 802.3 compliant transceiver with fully integrated filtering. The COL signal is asserted during collisions or jabber events, and the CRS signal is asserted during transmit and receive. In full duplex mode the ADM6995L can simultaneously transmit and receive data. Manchester Encoder/Decoder Data encoding and transmission begins when the transmission enable input (TXEN) goes high and continues as long as the transceiver is in good link state. Transmission ends when the transmission enable input goes low. The last transition occurs at the center of the bit cell if the last bit is a 1, or at the boundary of the bit cell if the last bit is 0. Decoding is accomplished by a differential input receiver circuit and a phase-locked loop that separate the Manchester-encoded data stream into clock signals and NRZ data. The decoder detects the end of a frame when no more mid bit transitions are detected. Within one and half bit times after the last bit, carrier sense is de-asserted. 3.6.2 ADMtek Inc. 3-6 ADM6995L Function Description 3.6.3 Transmit Driver and Receiver The ADM6995L integrates all the required signal conditioning functions in its 10Base-T block such that external filters are not required. Only one isolation transformer and impedance matching resistors are needed for the 10Base-T transmit and receive interface. The internal transmit filtering ensures that all the harmonics in the transmission signal are attenuated properly. Smart Squelch The smart squelch circuit is responsible for determining when valid data is present on the differential receive. The ADM6995L implements an intelligent receive squelch on the RXP/RXN differential inputs to ensure that impulse noise on the receive inputs will not be mistaken for a valid signal. The squelch circuitry employs a combination of amplitude and timing measurements (as specified in the IEEE 802.3 10Base-T standard) to determine the validity of data on the twisted-pair inputs. The signal at the start of the packet is checked by the analog squelch circuit and any pulses not exceeding the squelch level (either positive or negative, depending upon polarity) will be rejected. Once this first squelch level is overcome correctly, the opposite squelch level must then be exceeded within 150ns. Finally, the signal must exceed the original squelch level within an additional 150ns to ensure that the input waveform will not be rejected. Only after all these conditions have been satisfied will a control signal be generated to indicate to the remainder of the circuitry that valid data is present. Valid data is considered to be present until the squelch level has not been generated for a time longer than 200 ns, indicating end of packet. Once good data has been detected, the squelch levels are reduced to minimize the effect of noise, causing premature end-ofpacket detection. The receive squelch threshold level can be lowered for use in longer cable applications. This is achieved by setting bit 10 of register address 11h. 3.6.4 3.7 Carrier Sense Carrier Sense (CRS) is asserted due to receive activity once valid data is detected via the smart squelch function. For 10 Mbits/s half duplex operation, CRS is asserted during either packet transmission or reception. For 10 Mbits/s full duplex and repeater mode operations, the CRS is asserted only due to receive activity. 3.8 Jabber Function The jabber function monitors the ADM6995L output and disables the transmitter if it attempts to transmit a longer than legal sized packet. If TXEN is high for greater than ADMtek Inc. 3-7 ADM6995L Function Description 24ms, the 10Base-T transmitter will be disabled. Once disabled by the jabber function, the transmitter stays disabled for the entire time that the TXEN signal is asserted. This signal has to be de-asserted for approximately 256 ms (The un-jab time) before the jabber function re-enables the transmit outputs. The jabber function can be disabled by programming bit 4 of register address 10h to high. 3.9 Link Test Function A link pulse is used to check he integrity of the connection with the remote end. If valid link pulses are not received, the link detector disables the 10Base-T twisted-pair transmitter, receiver, and collision detection functions. The link pulse generator produces pulses as defined in IEEE 802.3 10Base-T standard. Each link pulse is nominally 100ns in duration and is transmitted every 16 ms, in the absence of transmit data. 3.10 Automatic Link Polarity Detection ADM6995L's 10Base-T transceiver module incorporates an "automatic link polarity detection circuit". The inverted polarity is determined when seven consecutive link pulses of inverted polarity or three consecutive packets are received with inverted end-of-packet pulses. If the input polarity is reversed, the error condition will be automatically corrected and reported in bit 5 of register 10h. 3.11 Clock Synthesizer The ADM6995L implements a clock synthesizer that generates all the reference clocks needed from a single external frequency source. The clock source must be a TTL level signal at 25 MHz +/- 50ppm 3.12 Auto Negotiation The Auto Negotiation function provides a mechanism for exchanging configuration information between two ends of a link segment and automatically selecting the highest performance mode of operation supported by both devices. Fast Link Pulse (FLP) Bursts provide the signaling used to communicate auto negotiation abilities between two devices at each end of a link segment. For further detail regarding auto negotiation, refer to Clause 28 of the IEEE 802.3u specification. The ADM6995L supports four different Ethernet protocols, so the inclusion of auto negotiation ensures that the highest performance protocol will be selected based on the ability of the link partner. Highest priority relative to the following list: * 100Base-TX full duplex (highest priority) * 100Base-TX half duplex * 10Base-T full duplex * 10Base-T half duplex (lowest priority) ADMtek Inc. 3-8 ADM6995L Function Description 3.13 Memory Block ADM6995L build in memory is divided as two blocks. One is MAC addressing table and another one is data buffer. MAC address Learning Table size is 2048 entry with each entry occupy eight bytes length. These eight bytes data include 6 bytes source address, VLAN information, Port information and Aging counter. Data buffer is divided to 256 bytes/block. ADM6995L buffer management is per port fixed block number and all port share one global buffer. This architecture can get better memory utilization and network balance on different speed and duplex test condition. Received packet will separate as several 256 bytes/block and chain together. If packet size more than 256 bytes then ADM6995L will chain two or more block to store receiving packet. 3.14 Switch Functional Description The ADM6995L uses a "store & forward" switching approach for the following reason: Store & forward switches allow switching between different speed media (e.g. 10BaseX and 100BaseX). Such switches require the large elastic buffer especially bridging between a server on a 100Mbps network and clients on a 10Mbps segment. Store & forward switches improve overall network performance by acting as a "network cache" Store & forward switches prevent the forwarding of corrupted packets by the frame check sequence (FCS) before forwarding to the destination port. 3.15 Basic Operation The ADM6995L receives incoming packets from one of its ports, searches in the Address Table for the Destination MAC Address and then forwards the packet to the other port within same VLAN group, if appropriate. If the destination address is not found in the address table, the ADM6995L treats the packet as a broadcast packet and forwards the packet to the other ports which in same VLAN group. The ADM6995L automatically learns the port number of attached network devices by examining the Source MAC Address of all incoming packets at wire speed. If the Source Address is not found in the Address Table, the device adds it to the table. ADMtek Inc. 3-9 ADM6995L 3.15.1 Address Learning Function Description The ADM6995L uses a hash algorithm to learn the MAC address and can learn up to 2K MAC addresses. Address is stored in the Address Table. The ADM6995L searches for the Source Address (SA) of an incoming packet in the Address Table and acts as below: If the SA was not found in the Address Table (a new address), the ADM6995L waits until the end of the packet (non-error packet) and updates the Address Table. If the SA was found in the Address Table, then aging value of each corresponding entry will be reset to 0. When the DA is PAUSE command, then the learning process will be disabled automatically by ADM6995L. 3.15.2 Address Recognition and Packet Forwarding The ADM6995L forwards the incoming packets between bridged ports according to the Destination Address (DA) as below. All the packet forwarding will check VLAN first. Forwarding port must same VLAN with source port. 1) If the DA is an UNICAST address and the address was found in the Address Table, the ADM6995L will check the port number and acts as follows: If the port number is equal to the port on which the packet was received, the packet is discarded. If the port number is different, the packet is forwarded across the bridge. 2) If the DA is an UNICAST address and the address was not found, the ADM6995L treats it as a multicast packet and forwards across the bridge. 3) If the DA is a Multicast address, the packet is forwarded across the bridge. 4) If the DA is PAUSE Command (01-80-C2-00-00-01), then this packet will be dropped by ADM6995L. ADM6995L can issue and learn PAUSE command. 5) ADM6995L will forward the packet with DA of ( 01-80-C2-00-00-00 ), filter out the packet with DA of ( 01-80-C2-00-00-01 ), and forward the packet with DA of ( 01-80-C2-00-00-02 ~ 01-80-C2-00-00-0F ) 3.15.3 Address Aging Address aging is supported for topology changes such as an address moving from one port to the other. When this happens, the ADM6995L internally has a 300 seconds timer will aged out (remove) the address from the address table. Aging function can enable/disable by user. Normally, disabling aging function is for security purpose. ADMtek Inc. 3-10 ADM6995L 3.15.4 Back off Algorithm Function Description The ADM6995L implements the truncated exponential back off algorithm compliant to the 802.3 CSMA-CD standard. ADM6995L will restart the back off algorithm by choosing 0-9 collision counts. The ADM6995L resets the collision counter after 16 consecutive retransmit trials. 3.15.5 Inter-Packet Gap (IPG) IPG is the idle time between any two successive packets from the same port. The typical number is 96 bits time. The value is 9.6us for 10Mbps ETHERNET, 960ns for 100Mbps fast ETHERNET and 96ns for 1000M. ADM6995L provide option of 92 bit gap in EEPROM to prevent packet lost when turn off Flow Control and clock P.P.M. value difference. 3.15.6 Illegal Frames The ADM6995L will discard all illegal frames such as runt packet (less than 64 bytes), oversize packet (greater than 1518 or 1522 bytes) and bad CRC. Dribbling packing with good CRC value will accept by ADM6995L. In case of bypass mode enabled, ADM6995L will support tag and untagged packets with size up to 1522 bytes. In case of non-bypass mode, ADM6995L will support tag packets up to 1526bytes, untagged packets up to 1522bytes. 3.15.7 Half Duplex Flow Control Back Pressure function is supported for half-duplex operation. When the ADM6995L cannot allocate a receive buffer for an incoming packet (buffer full), the device will transmit a jam pattern on the port, thus forcing a collision. Back Pressure is enabled by the BPEN set during RESET asserting. An ADMtek proprietary algorithm is implemented inside the ADM6995L to prevent back pressure function cause HUB partitioned under heavy traffic environment and reduce the packet lost rate to increase the whole system performance. 3.15.8 Full Duplex Flow Control When full duplex port run out of its receive buffer, a PAUSE packet command will be issued by ADM6995L to notice the packet sender to pause transmission. This frame based flow control is totally compliant to IEEE 802.3x. ADM6995L can issue or receive pause packet. 3.15.9 Broadcast Storm filter If Broadcast Storming filter is enable, the broadcast packets over the rising threshold ADMtek Inc. 3-11 ADM6995L within 50 ms will be discarded by the threshold setting. See EEPROM Reg.10h. Broadcast storm mode after initial: - time interval : 50ms the max. packet number = 7490 in 100Base, 749 in 10Base Per Port Rising Threshold 00 01 10 All 100TX Disable 10% 20% Not All Disable 1% 2% 100TX Function Description 11 40% 4% Per Port Falling Threshold 00 01 10 All 100TX Disable 5% 10% Not All Disable 0.5% 1% 100TX 11 20% 2% 3.16 Auto TP MDIX function At normal application which Switch connect to NIC card is by one by one TP cable. If Switch connect other device such as another Switch must by two way. First one is Cross Over TP cable. Second way is use extra RJ45 which crossover internal TX+- and RX+signal. By second way customer can use one by one cable to connect two Switch devices. All these effort need extra cost and not good solution. ADM6995L provide Auto MDIX function which can adjust TX+- and RX+- at correct pin. User can use one by one cable between ADM6995L and other device. This function can be Enable/Disable by hardware pin and EEPROM configuration register 0x01h~0x09h bit 15. If hardware pin set all port at Auto MDIX mode then EEPROM setting is useless. If hardware pin set all port at non Auto MDIX mode then EEPROM can set each port this function enable or disable. 3.17 Port Locking Port locking function will provide customer simple way to limit per port user number to one. If this function is turn on then ADM6995L will lock first MAC address in learning table. After this MAC address locking will never age out except Reset signal. Another MAC address which not same as locking one will be dropped. ADM6995L provide one MAC address per port. This function is per port setting. When turn on Port Locking function, recommend customer turn off aging function. See EEPROM register 0x12h bit 0~8. 3.18 VLAN setting & Tag/Untag & port-base VLAN ADM6995L supports bypass mode and untagged port as default setting while the chip is power-on. Thus, every packet with or without tag will be forwarding to the destination port without any modification by ADM6995L. Meanwhile port-base VLAN could be enabled according to the PVID value ( user define 4bits to map 16 groups written at register 13 to register 22 ) of the configuration content of each port. ADM6995L also supports 16 802.1Q VLAN groups. In VLAN four bytes tag include twelve VLAN ID. ADM6995L learn user define four bits of VID. If user need to use this ADMtek Inc. 3-12 ADM6995L function, two EEPROM registers are needed to be programmed first : Function Description * Port VID number at EEPROM register 0x01h~0x09h bit 13~10, register 0x28h~0x2bh and register 0x2ch bit 7~0: ADM6995L will check coming packet. If coming packet is non VLAN packet then ADM6995L will use PVID as VLAN group reference. ADM6995L will use packet's VLAN value when receive tagged packet. * VLAN Group Mapping Register. EEPROM register 013h~022h define VLAN grouping value. User use these register to define VLAN group. User can define each port as Tag port or Untag port by Configuration register Bit 4. The operation of packet between Tag port and Untag port can explain by follow example: Example1: Port receives Untag packet and send to Untag port. ADM6995L will check the port user define four bits of VLAN ID first then check VLAN group resister. If destination port same VLAN as receiving port then this packet will forward to destination port without any change. If destination port not same VLAN as receiving port then this packet will be dropped. Example2: Port receives Untag packet and send to Tag port. ADM6995L will check the port user define fours bits of VLAN ID first then check VLAN group resister. If destination port same VLAN as receiving port than this packet will forward to destination port with four byte VLAN Tag and new CRC. If destination port not same VLAN as receiving port then this packet will be dropped. Example3: Port receives Tag packet and send to Untag port. ADM6995L will check the packet VLAN ID first then check VLAN group resister. If destination port same VLAN as receiving port than this packet will forward to destination port after remove four bytes with new CRC error. If destination port not same VLAN as receiving port then this packet will be dropped. Example4: Port receives Tag packet and send to Tag port. ADM6995L will check the user define packet VLAN ID first then check VLAN group resister. If destination port same VLAN as receiving port than this packet will forward to destination port without any change. If destination port not same VLAN as receiving port then this packet will be dropped. 3.19 Priority Setting It is a trend that data, voice and video will be put on networking, Switch not only deal data packet but also provide service of multimedia data. ADM6995L provides two priority queues on each port with N:1 rate. See EEPROM Reg.0x10h. This priority function can set three ways as below: * By Port Base: Set specific port at specific queue. ADM6995L only check the port priority and not check packet's content VLAN and TOS. ADMtek Inc. 3-13 ADM6995L Function Description * By VLAN first: ADM6995L check VLAN three priority bit first then IP TOS priority bits. * By IP TOS first: ADM6995L check IP TOS three priority bit first then VLAN three priority bits. If port set at VLAN/TOS priority but receiving packet without VLAN or TOS information then port base priority will be used . 3.20 LED Display Three LED per port are provided by ADM6995L. Link/Act, Duplex/Col & Speed are three LED display of ADM6995L. Dual color LED mode also supported by ADM6995L. For easy production purpose ADM6995L will send test signal to each LED at power on reset stage. EEPROM register 0x12h define LED configuration table. ADM6995L LED is active Low signal. Dupcol0 & Dupcol1 will check external signal at Reset time. If external signal add pull high then LED will active Low. If external signal add pull down resister then LED will drive high. Single Color Mode R? LED-High 510 D? VCC LED Dual R? Link /Ac t Color 510 Mode D? Speed LED D? LED ADMtek Inc. 3-14 ADM6995L Register Description Chapter 4 Register Description 4.1 EEPROM Content EEPROM provides ADM6995L many options setting such as: * * * * * * Port Configuration: Speed, Duplex, Flow Control Capability and Tag/ Untag. VLAN & TOS Priority Mapping Broadcast Storming rate and Trunk. Fiber Select, Auto MDIX select VLAN Mapping Per Port Buffer number 4.2 EEPROM Register Map Bit 15- 8 Signature Port 0 Configuration Reserved Port 1 Configuration Reserved Port 2 Configuration Reserved Port 3 Configuration Port 4 Configuration Reserved VID 0, 1 Reserved option Configuration Register Reserved Reserved VLAN priority Map High TOS priority Map High Miscellaneous Configuration 0 Miscellaneous Configuration 1 Miscellaneous Configuration 2 VLAN 0 outbound Port Map VLAN 1 outbound Port Map VLAN 2 outbound Port Map VLAN 3 outbound Port Map VLAN 4 outbound Port Map VLAN 5 outbound Port Map VLAN 6 outbound Port Map Bit 7 - 0 Signature Port 0 Configuration Reserved Port 1 Configuration Reserved Port 2 Configuration Reserved Port 3 Configuration Port 4 Configuration Reserved Reserved Configuration Register Reserved Reserved VLAN priority Map Low TOS priority Map Low Miscellaneous Configuration 0 Miscellaneous Configuration 1 Miscellaneous Configuration 2 VLAN 0 outbound Port Map VLAN 1 outbound Port Map VLAN 2 outbound Port Map VLAN 3 outbound Port Map VLAN 4 outbound Port Map VLAN 5 outbound Port Map VLAN 6 outbound Port Map Default Value 0x4154h 0x040fh 0x040fh 0x040fh 0x040fh 0x040fh 0x040fh 0x040fh 0x040fh 0x040fh 0x5902h 0x8000h 0xfa50h 0xfa50h 0x5500h 0x5500h 0x0040h 0xff00h 0x3600h 0xffffh 0xffffh 0xffffh 0xffffh 0xffffh 0xffffh 0xffffh 4-1 Register 0x00h 0x01h 0x02h 0x03h 0x04h 0x05h 0x06h 0x07h 0x08h 0x09h 0x0ah 0x0bh 0x0ch 0x0dh 0x0eh 0x0fh 0x10h 0x11h 0x12h 0x13h 0x14h 0x15h 0x16h 0x17h 0x18h 0x19h ADMtek Inc. ADM6995L Register 0x1ah 0x1bh 0x1ch 0x1dh 0x1eh 0x1fh 0x20h 0x21h 0x22h 0x23h 0x24h 0x25h 0x26h 0x27h 0x28h 0x29h 0x2ah 0x2bh 0x2ch 0x2dh 0x2eh 0x2fh 0x30h 0x31h 0x32h 0x33h Bit 15- 8 Bit 7 - 0 VLAN 7 outbound Port Map VLAN 7 outbound Port Map VLAN 8 outbound Port Map VLAN 8 outbound Port Map VLAN 9 outbound Port Map VLAN 9 outbound Port Map VLAN 10 outbound Port Map VLAN 10 outbound Port Map VLAN 11 outbound Port Map VLAN 11 outbound Port Map VLAN 12 outbound Port Map VLAN 12 outbound Port Map VLAN 13 outbound Port Map VLAN 13 outbound Port Map VLAN 14 outbound Port Map VLAN 14 outbound Port Map VLAN 15 outbound Port Map VLAN 15 outbound Port Map Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved P0 PVID [11:4] Reserved P1 PVID [11:4] Reserved P2 PVID [11:4] P4 PVID [11:4] P3 PVID [11:4] VLAN Group Configuration P5 PVID [11:4] Reserved Reserved PHY Restart Miscellaneous Configuration 3 Miscellaneous Configuration 3 Bandwidth Control Register 3,2 Bandwidth Control Register 1,0 Reserved Bandwidth Control Register 5,4 Bandwidth Control Enable Bandwidth Control Enable Register Description Default Value 0xffffh 0xffffh 0xffffh 0xffffh 0xffffh 0xffffh 0xffffh 0xffffh 0xffffh 0x0000h 0x0000h 0x0000h 0x0000h 0x0000h 0x0000h 0x0000h 0x0000h 0x0000h 0xd000h 0x4442h 0x0000h 0x0000h 0x0987h 0x0000h 0x0000h 0x0000h 4.3 EEPROM Register 4.3.1 Signature Register, offset: 0x00h Bits Type Description 15:0 RO The value must be 4154h(AT) Initial value 0x4154h Note: ADM6995L will check register 0 value before read all EEPROM content. If this value does not match with 0x4154h then he other values in EEPROM will be useless. ADM6995L will use internal default value. User cannot write Signature register when programming ADM6995L internal register. ADMtek Inc. 4-2 ADM6995L Register Description 4.3.2 Configuration Registers, offset: 0x01h ~ 0x09h Bits Type Description Initial value 0 R/W 802.3x Flow control command ability. 1: enable. 0x1h 0: disable. 1 R/W Auto negotiation Enable. 1: enable, 0: disable. 0x1h 2 R/W Speed. 1: 100M, 0: 10M. 0x1h 3 R/W Duplex. 1: Full Duplex, 0: Half Duplex. 0x1h 4 R/W Output Packet Tagging. 1: Tag. 0:UnTag. 0x0h 5 R/W Port Disable. 1: disable port. 0: enable port. 0x0h 6 R/W TOS over VLAN priority. 1: Check TOS first, 0: Check VLAN. 0x0h 0x0h 7 R/W Enable port-base priority. 1: Port Base Priority. 0: VLAN or TOS. If packet without VLAN or TOS then port priority turn on. Note: If this bit turn on then ADM6995L will not check TOS or VLAN as priority reference. ADM6995L will check port base priority only. ADM6995L default is bypass mode which checks port base priority only. If user want check VLAN tag priority then must set chip at Tag mode. 9:8 R/W Port-base priority. 0x0h 13:10 R/W PVID. Port VLAN ID. Check Register 0x28h~0x2ch for other 0x1h PVID[11:4] 0x0h 14 R/W Select FX. 1: FX mode. 0: TP mode. Note: Port7 TX/FX can set by hardware Reset latch value P7FX. If hardware pin set Port7 as FX then this bit is useless. If hardware pin set Port7 as TX then this pin can set Port7 as FX or TX. 0x0h 15 R/W Crossover Auto MDIX enable. 1: enable. 0: disable. Note: Hardware Reset latch value EECK can set global Auto MDIX function. If hardware pin set all port at Auto MDIX then this bit is useless. If hardware pin set chip at non Auto MDIX then this bit can set each port at Auto MDIX. 4.3.3 Reserved Register, offset: 0x0ah Bits Type Description 8:0 RO Reserved 9 R/W Replaced packet VID 0, 1 by PVID. 1: enable, 0: disable. 15:10 RO Reserved Initial value 0x102h 0x0h 0x16h ADMtek Inc. 4-3 ADM6995L 4.3.4 Configuration Register, offset: 0x0bh Bits Type Description 5:0 RO Reserved 6 R/W Enable IPG leveling. 1/92 bit. 0/96 bit. Note: When this bit is enabled ADM6995L will transmit packet out at 92 bit IPG to clean buffer. If user disables this function then ADM6995L will transmit packet at 96 bit. 7 R/W Enable Trunk. 1: enable Port3, 4 as Trunk port. 0: disable. 14:8 RO Reserved 15 R/W Disable Far_End_Fault detection. 1: disable. 0: enable. 4.3.5 Reserved Register, offset: 0x0ch~0x0dh Bits Type Description 15:0 RO Reserved Register Description Initial value 0x0h 0x0h 0x0h 0x0h 0x1h Initial value 0xfa5h 4.3.6 Bits 1:0 3:2 5:4 7:6 9:8 11:10 13:12 15:14 Type R/W R/W R/W R/W R/W R/W R/W R/W VLAN priority Map Register, offset: 0x0eh Description Mapped priority of tag value (VLAN) 0. Mapped priority of tag value (VLAN) 1. Mapped priority of tag value (VLAN) 2. Mapped priority of tag value (VLAN) 3. Mapped priority of tag value (VLAN) 4. Mapped priority of tag value (VLAN) 5. Mapped priority of tag value (VLAN) 6. Mapped priority of tag value (VLAN) 7. Initial value 0x0h 0x0h 0x1h 0x1h 0x2h 0x2h 0x3h 0x3h Note: Value 3 ~ 0 are for priority queue Q3~Q0 respectively. The Weight ratio is Q3 : Q2 : Q1: Q0 = 8 : 4 : 2 : 1. The default is port-base priority for un-tag packet and non_IP frame. 4.3.7 TOS priority Map Register, offset: 0x0fh Bits Type Description 1:0 R/W Mapped priority of tag value (TOS) 0. 3:2 R/W Mapped priority of tag value (TOS) 1. 5:4 R/W Mapped priority of tag value (TOS) 2. 7:6 R/W Mapped priority of tag value (TOS) 3. 9:8 R/W Mapped priority of tag value (TOS) 4. 11:10 R/W Mapped priority of tag value (TOS) 5. Initial value 0x0h 0x0h 0x1h 0x1h 0x2h 0x2h ADMtek Inc. 4-4 ADM6995L Bits Type Description 13:12 R/W Mapped priority of tag value (TOS) 6. 15:14 R/W Mapped priority of tag value (TOS) 7. Note: Value 3 ~ 0 are for priority queue Q3~Q0 respectively. The Weight ratio is Q3 : Q2 : Q1: Q0 = 8 : 4 : 2 : 1. The default is port-base priority for un-tag packet and non_IP frame. 4.3.8 Packet with Priority: Normal packet content Ethernet Packet from Layer 2 Preamble/SFD Destination (6 bytes) Byte 0~5 Source (6 bytes) Packet length (2 Data (46-1500 bytes) bytes) Byte 6~11 Byte 12~13 Byte 14~ Register Description Initial value 0x3h 0x3h CRC (4 bytes) 4.3.9 VLAN Packet ADM6995L will check packet byte 12 &13. If byte[12:13]=8100h then this packet is a VLAN packet Tag Protocol TD 8100 Byte 12~13 Tag Control Information LEN Length TCI Byte14~15 Byte 16~17 Routing Information Byte 18 Byte 14~15: Tag Control Information TCI Bit[15:13]: User Priority 7~0 Bit 12: Canonical Format Indicator (CFI) Bit[11~0]: VLAN ID. The ADM6995L will use bit[3:0] as VLAN group. ADMtek Inc. 4-5 ADM6995L Register Description 4.3.10 TOS IP Packet ADM6995L check byte 12 &13 if this value is 0800h then ADM6995L knows this is a TOP priority packet. Type 0800 Byte 12~13 IP header define Byte 14 Bit[7:0]: IP protocol version number & header length. Byte 15: Service type Bit[7~5]: IP Priority (Precedence ) from 7~0 Bit 4: No Delay (D) Bit 3: High Throughput Bit 2: High Reliability (R) Bit[1:0]: Reserved IP Header Byte 14~15 4.3.11 Bits Type 1:0 R/W 2 R/W 3 R/W 4 R/W 5 RO 6 RO 7 R/W 9:8 R/W 11:10 R/W 13:12 R/W 15:14 R/W Miscellaneous Configuration Register, offset: 0x10h Description Broadcast Storming Threshold [1:0]. See below table. Broadcast Storming Enable. 1/ enable, 0/disable. Default 0. Reserved. Default 0. XCRC. 1/disable CRC check, 0/enable CRC Check. Default 0. Reserved Reserved Aging Disable. 1/disable aging, 0/enable aging. Default 0. Discard mode (drop scheme for Q0) Discard mode (drop scheme for Q1) Discard mode (drop scheme for Q2) Discard mode (drop scheme for Q3) Initial value 0x0h 0x0h 0x0h 0x0h 0x0h 0x1h 0x0h 0x0h 0x0h 0x0h 0x0h Note: Bit[1:0]: Broadcast Storming threshold. Broadcast storm mode after initial: - time interval : 50ms the max. packet number = 7490 in 100Base, 749 in 10Base ADMtek Inc. 4-6 ADM6995L Note (Continued): - per port rising threshold 00 01 All Disable 10% 100TX Not All Disable 1% 100TX Register Description 10 20% 2% 11 40% 4% - per port falling threshold 00 01 10 11 All Disable 5% 10% 20% 100TX Not All Disable 0.5% 1% 2% 100TX Bit 2: Broadcast Storming Enable. 0/Disable. 1/Enable. Bit 4: CRC check disable. 1/ Disable. 0/Enable. Bit 7: Aging Disable. 1/Disable. 0/Enable. Drop Scheme for each queue Discard Mode 00 01 Utilization TBD 0% 0% 10 25% 11 50% 4.3.12 Bits Type 3:0 RO 4 RO 5 RO 7:6 RO 15:8 RO 4.3.13 Bits Type 0 R/W 1 R/W 2 R/W 3 R/W 4 R/W 5 R/W 6 R/W 7 R/W 8 R/W 10:9 R/W VLAN mode select Register, offset: 0x11h. Description Reserved Reserved Reserved Reserved Reserved Miscellaneous Configuration register, offset: 0x12h Description Port0 MAC Lock. 1: Lock first MAC source address, 0: disable. Reserved Port1 MAC Lock. 1: Lock first MAC source address, 0: disable. Reserved Port2 MAC Lock. 1: Lock first MAC source address, 0: disable. Reserved Port3 MAC Lock. 1: Lock first MAC source address, 0: disable. Port4 MAC Lock. 1: Lock first MAC source address, 0: disable. Port5 MAC Lock. 1: Lock first MAC source address, 0: disable. Reserved Initial value 0x0h 0x0h 0x0h 0x0h 0xffh Initial value 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x3h ADMtek Inc. 4-7 ADM6995L Bits 11 13:12 14 15 Type R/W R/W R/W R/W Description Reserved Reserved Reserved Drop packet when excessive collision happen enable. 1: enable, 0: disable. VLAN mapping table registers, offset: 0x22h ~ 0x13h Description VLAN mapping table. Reserved Register Description Initial value 0x0h 0x3h 0x0h 0x0h 4.3.14 Bits Type 8:0 R/W 15:9 RO Initial value 0x1ffh 0x7fh Note: 16 VLAN Group: See Register 0x2ch bit 11=0 Bit0: Port0 Bit6: Port3 Bit2: Port1 Bit7: Port4 Bit4: Port2 Bit8: Port5. Select the VLAN group ports is to set the corresponding bits to 1. 4.3.15 Reserved Register, offset: 0x27h ~ 0x23h Bits Type Description 15:0 R/W Reserved Initial value 0x0h 4.3.16 Port0 PVID bit 11 ~ 4 Configuration Register, offset: 0x28h Bits Type Description 7:0 R/W Port0 PVID bit 11~4. These 8 bits combine with register 0x01h Bit [13~10] as full 12 bit VID. 15:8 RO Reserved Initial value 0x0h 0x0h 4.3.17 Port1 PVID bit 11 ~ 4 Configuration Register, offset: 0x29h Bits Type Description 7:0 R/W Port1 PVID bit 11~4. These 8 bits combine with register 0x03h Bit[13~10] as full 12 bit VID. 15:8 RO Reserved Initial value 0x0h 0x0h ADMtek Inc. 4-8 ADM6995L 4.3.18 Port2 PVID bit 11~4 Configuration Register, offset: 0x2ah Bits Type Description 7:0 R/W Port2 PVID bit 11~4. These 8 bits combine with register 0x05h Bit[13~10] as full 12 bit VID. 15:8 RO Reserved 4.3.19 Port3, 4 PVID bit 11~4 Configuration Register, offset: 0x2bh Bits Type Description 7:0 R/W Port3 PVID bit 11~4. These 8 bits combine with register 0x07h Bit[13~10] as full 12 bit VID. 15:8 RO Port4 PVID bit 11~4. These 8 bits combine with register 0x08h Bit[13~10] as full 12 bit VID. 4.3.20 Bits Type 7:0 RO 10:8 R/W VLAN group shift bits Configuration Register, offset: 0x2ch Description Reserved. Tag shift for VLAN grouping. Default 000. 0: VID[3:0] 1: VID[4:1] 2: VID[5:2] 3: VID[6:3] 4: VID[7:4] 5: VID[8:5] 6: VID[9:6] 7: VID[10:7] Reserved Control reserved MAC (0180C2000010-0180C20000FF) 1: Forward, 0: Discard. Control reserved MAC (0180C2000002- 0180C200000F) 1: Forward, 0: Discard. Control reserved MAC (0180C2000001) 1: Forward, 0: Discard. Control reserved MAC (0180C2000000) 1: Forward, 0: Discard. Register Description Initial value 0x0h 0x0h Initial value 0x0h 0x0h Initial value 0x0h 0x0h 11 12 13 14 15 R/W R/W R/W R/W R/W 0x0h 0x1h 0x1h 0x0h 0x1h Note: Bit[10:8]: VLAN Tag shift register. ADM6995L will select 4 bit from total 12 bit VID as VLAN group reference. Bit[15:12]: IEEE 802.3 reserved DA forward or drop police. 4.3.21 Reserved Register, offset: 0x2dh Bits Type Description 15:0 R/W Reserved Initial value 0x4442h ADMtek Inc. 4-9 ADM6995L Register Description 4.3.22 Reserved Register, offset: 0x2eh Bits Type Description 15:0 R/W Reserved 4.3.23 PHY Restart, offset: 0x2fh Bits Type Description 15:0 R/W Write 0x0000h to this register will restart internal PHYs. 4.3.24 Bits Type 0 R/W 1 R/W 2 R/W 4:3 R/W 5 R/W 6 R/W 7 R/W 8 R/W 9 R/W Miscellaneous Configuration Register, offset: 0x30h Description Reserved Reserved Reserved Reserved MAC Clone Enable Bit[1]. Reserved Reserved Reserved Dual Speed Hub COL_LED Enable. 1: Dual Speed Hub LED display. Port0 Col LED: 10M Col LED. Port1 Col LED: 100M Col LED. 0: Normal LED display. Reserved Reserved Port 4 LED Mode. 1:Link/Act/Speed 0:LinkAct/DupCol/Speed Reserved Bandwidth Control Register0~3, offset: 0x31h Description Port 0 Meter Threshold Control. Reference table below. Receive Packet Length Counted on the Source Port 0. 0 = The switch will add length to the P0 counter. Port 1 Meter Threshold Control, default 000. Reference table below. Receive Packet Length Counted on the Source Port 1. 0 = The switch will add length to the P1 counter. Port 2 Meter Threshold Control, default 000. Reference table below. Receive Packet Length Counted on the Source Port 2. Initial value 0x0000h Initial value 0x0000h Initial value 0x1h 0x1h 0x1h 0x0h 0x0h 0x0h 0x1h 0x1h 0x0h 10 11 12 R/W R/W R/W 0x0h 0x1h 0x0h 15:13 R/W 0x0h 4.3.25 Bits Type 2:0 R/W 3 R/W 6:4 7 10:8 11 ADMtek Inc. R/W R/W R/W R/W Initial value 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 4-10 ADM6995L Bits Type Description 0 = The switch will add length to the P2 counter. 14:12 R/W Port 3 Meter Threshold Control. Reference table below. 15 R/W Receive Packet Length Counted on the Source Port 3. 0 = The switch will add length to the P3 counter. Note: Reference Table 000 001 256K 512K Register Description Initial value 0x0h 0x0h 010 1M 011 2M 100 5M 101 10M 110 20M 111 50M 4.3.26 Bits Type 2:0 R/W 3 R/W 6:4 7 15:8 Bandwidth Control Register 4~5, offset: 0x32h Description Port 4 Meter Threshold Control. Reference table below. Receive Packet Length Counted on the Source Port 4 0 = The switch will add length to the P4 counter. RO Reserved RO Reserved RO Reserved Initial value 0x0h 0x0h 0x0h 0x0h 0x0h Note: Reference Table 000 001 256K 512K 010 1M 011 2M 100 5M 101 10M 110 20M 111 50M 4.3.27 Bandwidth Control Enable Register, offset: 0x33h Bits Type Description 0 R/W Bandwidth Control Enable for Port 0. 1 = Port 0 enables the bandwidth control. 0 = Port 0 disables the bandwidth control. 1 R/W Reserved 2 R/W Bandwidth Control Enable for Port 1. 3 R/W Reserved 4 R/W Bandwidth Control Enable for Port 2. 5 R/W Reserved 6 R/W Bandwidth Control Enable for Port 3. 7 R/W Bandwidth Control Enable for Port 4. 8 RO Reserved. 15:9 RO Reserved Initial value 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h ADMtek Inc. 4-11 ADM6995L Register Description 4.4 EEPROM Access Customer can select ADM6995L read EEPROM contents as chip setting or not. ADM6995L will check the signature of EEPROM to decide read content of EEPROM or not. RESETL & EEPROM content relationship RESETL 0 CS High Impedance SK High Impedance Output Input DI High Impedance Output Output DO High Impedance Input Input Rising edge 0 1 Output (30ms) 1 (after 30ms) Input Keep at least 30ms after RESETL from 0 1. ADM6995L will read data from EEPROM. After RESETL if CPU update EEPROM that ADM6995L will update configuration registers too. When CPU programming EEPROM & ADM6995L, ADM6995L recognizes the EEPROM WRITE instruction only. If there is any Protection instruction before or after the EEPROM WRITE instruction, CPU needs to generate separated CS signal cycle for each Protection & WRITE instruction. CPU can directly program ADM6995L after 30ms of Reset signal rising edge with or without EEPROM ADM6995L serial chips will latch hardware-reset value as recommend value. It includes EEPROM interface: EECS: Internal Pull down 40K resister. EESK: TP port Auto-MDIX select. Internal pull down 40K resister as non Auto-MDIX mode. EDI: Dual Color Select. Internal pull down 40K resister as Single Color Mode. EDO: EEPROM enable. Internal pull up 40K resister as EEPROM enable. Below Figure is ADM6995L serial chips EEPROM pins operation at different stage. Reset signal is control by CPU with at least 100ms low. Point1 is Reset rising edge. CPU must prepare proper value on EECS(0), EESK, EDI, EDO(1) before this rising edge. ADM6995L will read this value into chip at Point2. CPU must keep these values over point2. Point2 is 200ns after Reset rising edge. ADM6995L serial chips will read EEPROM content at Point4 which 800ns far away from the rising edge of Reset. CPU must turn EEPROM pins EECS, EESK, EDI and EDO to High-Z or pull high before Point4. If user want change state to High-Z or pull high on EEPROM pins, the order is CS-> DI > DO -> SK is better. ADMtek Inc. 4-12 ADM6995L Register Description 800nS 200nS Reset 100mS 1 2 3 4 5 200nS A little bit different with the timing on writing EEPROM. See below graph. Must be carefully is when CS go down after write a command, SK must issue at least one clock. This is a difference between ADM6995L with EEPROM write timing. If system without EEPROM then user must write ADM6995L internal register by 93C66 timing. If user uses EEPROM then the writing timing is depend on EEPROM type. CS SK Write Command 4.5 Serial Register Map Bit 31- 0 Chip Identifier Port Status 0 Port Status 1 Cable Broken Status Port 0 Receive Packet Count Reserved Port 1 Receive Packet Count Reserved Port 2 Receive Packet Count Reserved Port 3 Receive Packet Count MODE RO RO RO RO RO RO RO RO RO RO RO Default 0x00071010h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 4-13 Register 0x00h 0x01h 0x02h 0x03h 0x04h 0x05h 0x06h 0x07h 0x08h 0x09h 0x0ah ADMtek Inc. ADM6995L Register 0x0bh 0x0ch 0x0dh 0x0eh 0x0fh 0x10h 0x11h 0x12h 0x13h 0x14h 0x15h 0x16h 0x17h 0x18h 0x19h 0x1ah 0x1bh 0x1ch 0x1dh 0x1eh 0x1fh 0x20h 0x21h 0x22h 0x23h 0x24h 0x25h 0x26h 0x27h 0x28h 0x29h 0x2ah 0x2bh 0x2ch 0x2dh 0x2eh 0x2fh 0x30h 0x31h 0x32h 0x33h 0x34h 0x35h 0x36h Bit 31- 0 Port 4 Receive Packet Count Reserved Port 0 Receive Packet Byte Count Reserved Port 1 Receive Packet Byte Count Reserved Port 2 Receive Packet Byte Count Reserved Port 3 Receive Packet Byte Count Port 4 Receive Packet Byte Count Reserved Port 0 Transmit Packet Count Reserved Port 1 Transmit Packet Count Reserved Port 2 Transmit Packet Count Reserved Port 3 Transmit Packet Count Port 4 Transmit Packet Count Reserved Port 0 Transmit Packet Byte Count Reserved Port 1 Transmit Packet Byte Count Reserved Port 2 Transmit Packet Byte Count Reserved Port 3 Transmit Packet Byte Count Port 4 Transmit Packet Byte Count Reserved Port 0 Collision Count Reserved Port 1 Collision Count Reserved Port 2 Collision Count Reserved Port 3 Collision Count Port 4 Collision Count Reserved Port 0 Error Count Reserved Port 1 Error Count Reserved Port 2 Error Count Reserved MODE RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Register Description Default 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h ADMtek Inc. 4-14 ADM6995L Register 0x37h 0x38h 0x39h 0x3ah 0x3bh 0x3ch Bit 31- 0 Port 3 Error Count Port 4 Error Count Reserved Over Flow Flag 0 Over Flow Flag 1 Over Flow Flag 2 MODE RO RO RO LH/COR LH/COR LH/COR Register Description Default 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 0x00000000h 4.6 Serial Register Description 4.6.1 Chip Identifier Register, offset: 0x00h Bits Type Description 3:0 RO 0000 (Version number) 31:4 RO 0x0007101h 4.6.2 Port Status 0 Register, offset: 0x01h Bits Type Description 0 RO Port 0 Linkup Status: 1: Link is established. 0: Link is not established. 1 RO Port 0 Speed Status: 1: 100Mb/s 0: 10 Mb/s 2 RO Port 0 Duplex Status 1: Full Duplex. 0: Half Duplex. 3 RO Port 0 Flow Control Enable 1: 802.3X on for full duplex or back pressure on for half duplex. 0: Flow Control Disable 4 RO Reserved 5 RO Reserved 6 RO Reserved 7 RO Reserved 8 RO Port 1 Linkup Status: 1: Link is established. 0: Link is not established. 9 RO Port 1 Speed Status: 1: 100Mb/s 0: 10 Mb/s 10 RO Port 1 Duplex Status 1: Full Duplex. 0: Half Duplex. 11 RO Port 1 Flow Control Enable Initial value 0x0h 0x7101h Initial value 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h ADMtek Inc. 4-15 ADM6995L Bits Type Description 1: 802.3X on for full duplex or back pressure on for half duplex. 0: Flow Control Disable RO Reserved RO Reserved RO Reserved RO Reserved RO Port 2 Linkup Status: 1: Link is established. 0: Link is not established. RO Port 2 Speed Status: 1: 100Mb/s 0: 10 Mb/s RO Port 2 Duplex Status 1: Full Duplex. 0: Half Duplex. RO Port 2 Flow Control Enable 1: 802.3X on for full duplex or back pressure on for half duplex. 0: Flow Control Disable RO Reserved RO Reserved RO Reserved RO Reserved RO Port 3 Linkup Status: 1: Link is established. 0: Link is not established. RO Port 3 Speed Status: 1: 100Mb/s 0: 10 Mb/s RO Port 3 Duplex Status 1: Full Duplex. 0: Half Duplex. RO Port 3 Flow Control Enable 1: 802.3X on for full duplex or back pressure on for half duplex. 0: Flow Control Disable RO Port 4 Linkup Status: 1: Link is established. 0: Link is not established. RO Port 4 Speed Status: 1: 100Mb/s 0: 10 Mb/s RO Port 4 Duplex Status 1: Full Duplex. 0: Half Duplex. RO Port 4 Flow Control Enable 1: 802.3X on for full duplex or back pressure on for half duplex. Register Description Initial value 12 13 14 15 16 0x0h 0x0h 0x0h 0x0h 0x0h 17 0x0h 18 0x0h 19 0x0h 20 21 22 23 24 0x0h 0x0h 0x0h 0x0h 0x0h 25 0x0h 26 0x0h 27 0x0h 28 0x0h 29 0x0h 30 0x0h 31 0x0h ADMtek Inc. 4-16 ADM6995L Bits Type Description 0: Flow Control Disable Register Description Initial value 4.6.3 Port Status 1 Register, offset: 0x02h Bits Type Description 0 RO Reserved 2:1 RO Reserved 3 RO Reserved 4 RO Reserved 31:5 RO Reserved Initial value 0x0h 0x0h 0x0h 0x0h 0x0h 4.6.4 Cable Broken Status Register, offset: 0x03h Bits Type Description 1:0 RO Port 0 Cable Broken Length 2 RO Port 0 Cable Broken 4:3 RO Reserved 5 RO Reserved 7:6 RO Port 1 Cable Broken Length 8 RO Port 1 Cable Broken 10:9 RO Reserved 11 RO Reserved 3:12 RO Port 2 Cable Broken Length 14 RO Port 2 Cable Broken 16:15 RO Reserved 17 RO Reserved 19:18 RO Port 3 Cable Broken Length 20 RO Port 3 Cable Broken 22:21 RO Port 4 Cable Broken Length 23 RO Port 4 Cable Broken 31:24 RO Reserved Initial value 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 4.6.5 Over Flow Flag 0 Register, offset: 0x3ah Bits Type Description 0 RO Overflow of Port 0 Receive Packet Count 1 RO Reserved 2 RO Overflow of Port 1 Receive Packet Count 3 RO Reserved 4 RO Overflow of Port 2 Receive Packet Count 5 RO Reserved ADMtek Inc. Initial value 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 4-17 ADM6995L Bits Type Description 6 RO Overflow of Port 3 Receive Packet Count 7 RO Overflow of Port 4 Receive Packet Count 8 RO Reserved 9 RO Overflow of Port 0 Receive Packet Byte Count 10 RO Reserved 11 RO Overflow of Port 1 Receive Packet Byte Count 12 RO Reserved 13 RO Overflow of Port 2 Receive Packet Byte Count 14 RO Reserved 15 RO Overflow of Port 3 Receive Packet Byte Count 16 RO Overflow of Port 4 Receive Packet Byte Count 17 RO Reserved 31:18 RO Reserved 4.6.6 Over Flow Flag 0: Register 0x3bh Bits Type Description 0 RO Overflow of Port 0 Transmit Packet Count 1 RO Reserved 2 RO Overflow of Port 1 Transmit Packet Count 3 RO Reserved 4 RO Overflow of Port 2 Transmit Packet Count 5 RO Reserved 6 RO Overflow of Port 3 Transmit Packet Count 7 RO Overflow of Port 4 Transmit Packet Count 8 RO Reserved 9 RO Overflow of Port 0 Transmit Packet Byte Count 10 RO Reserved 11 RO Overflow of Port 1 Transmit Packet Byte Count 12 RO Reserved 13 RO Overflow of Port 2 Transmit Packet Byte Count 14 RO Reserved 15 RO Overflow of Port 3 Transmit Packet Byte Count 16 RO Overflow of Port 4 Transmit Packet Byte Count 17 RO Reserved 31:18 RO Reserved Register Description Initial value 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h Initial value 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 4.6.7 Over Flow Flag 2 Register, offset: 0x3ch Bits Type Description 0 RO Overflow of Port 0 Collision Count 1 RO Reserved 2 RO Overflow of Port 1 Collision Count ADMtek Inc. Initial value 0x0h 0x0h 0x0h 4-18 ADM6995L Bits Type Description 3 RO Reserved 4 RO Overflow of Port 2 Collision Count 5 RO Reserved 6 RO Overflow of Port 3 Collision Count 7 RO Overflow of Port 4 Collision Count 8 RO Reserved 9 RO Overflow of Port 0 Error Count 10 RO Reserved 11 RO Overflow of Port 1 Error Count 12 RO Reserved 13 RO Overflow of Port 2 Error Count 14 RO Reserved 15 RO Overflow of Port 3 Error Count 16 RO Overflow of Port 4 Error Count 17 RO Reserved 31:18 RO Reserved Register Description Initial value 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h 0x0h ADMtek Inc. 4-19 ADM6995L Register Description 4.7 Serial Interface Timing ADM6995L serial chip internal counter or EEPROM access timing. EESK: Similar as MDC signal. EDI: Similar as MDIO. ECS: Must keep low. EECK EEDI (STA) EEDI (AT8999) z z 1 Preamble 0 1 1 0 1 0 0 0 0 1 1 1 1 1 z 0 TA 0 1 0 0 0 0 0 0 0 0 z Idle Start Opcode Table Device (read) Select Address Register Address Register Data [31:0] Preamble: At least 32 continuous "1". Start: 01(2 bits) Opcode: 10 (2 bits, Only supports read command) Table select: 1/Counter, 0/ EEPROM (1 bit) Register Address: Read Target register address. ( 7 bits) TA: Turn Around. Register Data: 32 bit data. Counter output bit sequence is bit 31 to bit 0. If user read EEPROM then 32 bits data will separate as two EEPROM registers. The sequence is: Register +1, Register ( Register is even number). Register, Register-1(Register is Odd number). Example: Read Register 00h then ADM6995L will drive 0x01h & 0x00h. Read Register 03h then ADM6995L will drive 0x03h & 0x02h. Idle: EESK must send at least one clock at idle time. ADM6995L issue Reset internal counter command EESK: Similar as MDC signal. EDI: Similar as MDIO. ECS: Must keep low. EECK EEDI (STA) z 0 1 0 1 1 0 0 0 0 0 0 0 0 1 Preamble Start Opcode (reset) Device Reset Port Number or Counter Index Address Type Idle ADMtek Inc. 4-20 ADM6995L Register Description Preamble: At least 32 continuous "1". Start: 01(2 bits) Opcode: 01 (2 bits, Reset command) Device Address: Chip physical address as PHYAS[1:0]. Reset_type: Reset counter by port number or by counter index. 1: Clear dedicate port's all counters. 0: Clear dedicate counter. Port_number or counter index: User define clear port or counter. Idle: EECK must send at least one clock at idle time. ADMtek Inc. 4-21 ADM6995L Electrical Specification Chapter 5 Electrical Specification 5.1 TX/FX Interface 5.1.1 TP Interface Transformer requirement: . TX/RX rate 1:1 . TX/RX central tap connect together to VCCA2. User can change TX/RX pin for easy layout but do not change polarity. ADM6995L supports auto polarity on receiving side. 5.1.2 FX Interface ADMtek Inc. 5-1 ADM6995L Electrical Specification 5.2 5.2.1 DC Characteristics Absolute Maximum Rating Parameter Power Supply TX line driver PLL voltage Digital core voltage Input Voltage Output Voltage Storage Temperature Power Dissipation ESD Rating Rating -0.3 to 3.63 1.8 1.8 1.8 -0.3 to VCC + 0.3 -0.3 to Vcc + 0.3 -55 to 155 1.3W 2KV Units V V V V V V C W V Symbol VCC Vcca2 Vccpll Vccik VIN Vout TSTG PD ESD 5.2.2 Symbol Vcc Vcca2 Vccpll Vccik Vin PC Tj 5.2.3 Recommended Operating Conditions Parameter Power Supply TX line driver PLL voltage Digital core voltage Input Voltage Power consumption Junction Operating Temperature Min 2.8 1.7 1.7 1.7 0 0 Typ 3.3 1.8 1.8 1.8 1.3 25 Max 3.465 1.9 1.9 1.9 Vcc 115 Units V V V V V W C DC Electrical Characteristics for 3.3V Operation Under Vcc=3.0V~3.6V, Tj= 0 C ~ 115 C ) Symbol VIL VIH VOL VOH RI Parameter Conditions Min Typ Input Low Voltage CMOS Input High Voltage CMOS 0.7 * Vcc Output Low Voltage CMOS Output High Voltage CMOS 0.7 * Vcc Input Pull_up/down VIL=0V or 100 Resistance VIH = Vcc Max Units 0.3 * Vcc V V 0.4 V V K ADMtek Inc. 5-2 ADM6995L Electrical Specification 5.3 5.3 5.3.1 AC Characteristics AC Characteristics Power On Reset 0ms 50ms 100ms tRST RST* tCONF All Configuration Pins Symbol Parameter TRST RST Low Period TCONF Start of Idle Pulse Width Conditions Min 100 100 Typ Max Units ms ns 5.3.2 EEPROM Interface Timing 0us 10u s 20us 30us EECS tESKL tESKH EESK tEWDD EEDO tERDS EEDI tERDH tESK Symbol TESK TESKL TESKH TERDS Parameter Conditions Min EESK Period EESK Low Period 2550 EESK High Period 2550 EEDI to EESK Rising Setup 10 Time TERDH EEDI to EESK Rising Hold 10 Time TEWDD EESK Falling to EEDO Output Delay Time Typ 5120 Max 2570 2570 Units ns ns ns ns ns 20 ns ADMtek Inc. 5-3 ADM6995L 5.3.3 GPSI(7-wire) Input Timing 0ns 250 ns 500ns Electrical Specification tCK tCKL tCKH GPSI_TXCLK tTXH tTXS GPSI_TXD GPSI_TXEN Symbol TCK TCKL TCKH TTXS Parameter GPSI_TXCLK Period GPSI_TXCLK Low Period GPSI_TXCLK High Period GPSI_TXD, GPSI_TXEN to GPSI_TXCLK Rising Setup Time GPSI_TXD, GPSI_TXEN to GPSI_TXCLK Rising Hold Time Conditions Min 40 40 10 Typical 100 Max 60 60 Units ns ns ns ns TTXH 10 ns 5.3.4 GPSI(7-wire) Output Timing 0ns 250 ns 500ns tCK tCKL tCKH GPSI_RXCLK GPSI_RXD tOD GPSI_CRS/COL Symbol TCK TCKL TCKH TOD Parameter Conditions GPSI_RXCLK Period GPSI_RXCLK Low Period GPSI_RXCLK High Period GPSI_RXCLK Rising to GPSI CRS/GPSI COL Min 40 40 50 Typical 100 Max 60 60 70 Units ns ns ns ns ADMtek Inc. 5-4 ADM6995L Symbol Parameter Output Delay Conditions Min Typical Electrical Specification Max Units ADMtek Inc. 5-5 ADM6995L Appendix Chapter 6 Packaging 6.1 128 Pin PQFP Outside Dimension 17.2 +/- 0.2 mm 14.0 +/- 0.1 mm 12.5 mm 23.2 +/- 0.2 mm 20.0 +/- 0.1 mm 18.5 mm 0.5 mm ADMtek Inc. 3.4 mm MAX 6-1 |
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