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CMI 8768
PCI 8CH Integrated Sound Chip Enhanced by Xear 3DTM Sound Technology
Data Sheet
Rev. 0.9 Mar. 31, 2004
NOTICES
THIS DOCUMENT IS PROVIDED "AS IS" WITH NO WARRANTIES WHATSOEVER, INCLUDING ANY WARRANTY OF MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR ANY PARTICULAR PURPOSE, OR ANY WARRANTY OTHERWISE ARISING OUT OF ANY PROPOSAL, DOCUMENT OR SAMPLE.
ALL RIGHTS RESERVED. NO PART OF THIS DOCUMENT MAY BE REPRODUCED OR TRANSMITTED IN ANY FORM OR BY ANY MEANS, ELECTRONIC OR MECHANICAL, INCLUDING INFORMATION STORAGE AND RETRIEVAL SYSTEMS, WITHOUT PERMISSION IN WRITING FROM THE C-MEDIA ELECTRONICS, INC.
Third-party brands and names are the property of their respective owners.
Copyright 2003-2004 (c) C-Media Electronics Inc.
C-Media Electronics, Inc.
6F, 100, Sec. 4, Civil Boulevard, Taipei, Taiwan 106, R.O.C. TEL: 886-2-8773-1100 FAX: 886-2-8773-2211 http://www.cmedia.com.tw For detailed product information, please contact sales@cmedia.com.tw
PCI 8CH Integrated Sound Chip CMI8768 Datasheet Rev 0.9
Contents
0. 1. 2. 3. 4. 5. 5.1 5.2 5.3 5.4 6. 6.1 6.2 6.3 6.4 6.5 6.6 7. Revision History............................................................................................................... 3 Features........................................................................................................................... 4 Overview......................................................................................................................... 5 Block Diagram................................................................................................................ 7 Pin Assignment ............................................................................................................... 8 Pin Description ................................................................................................................ 9 Digital I/O ....................................................................................................................... 9 Analog I/O ................................................................................................................... 10 Power & Ground ......................................................................................................... 10 NC ........................................................................................................10 Electrical Characteristics............................................................................................. 11 Maximum Ratings ....................................................................................................... 11 Recommended Operating Conditions................................................................... 11 Power Consumption................................................................................................... 11 Digital Characteristics ................................................................................................ 11 AC Characteristics ..................................................................................................... 12 Analog Performance ................................................................................................. 13 Mechanical Dimensions .............................................................................................. 15
Copyright 2003-2004 (c) C-Media Electronics Inc.
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PCI 8CH Integrated Sound Chip CMI8768 Datasheet Rev 0.9
List of Figures
Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Graphic User Interface Samples-- Main Setting & Mixer ............................... 5 Graphic User Interface Samples--Virtual Speaker SHIFTER & Sound Effect.. 6 Graphic User Interface Samples--Karaoke & Magic Voice & Information.. 6 Block Diagram ................................................................................................... 7 Top View of CMI8768......................................................................................... 8 Mechanical Dimension................................................................................... 15
Copyright 2003-2004 (c) C-Media Electronics Inc.
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PCI 8CH Integrated Sound Chip CMI8768 Datasheet Rev 0.9
0. Revision History
Date
2003/06/13 2003/07/17 2003/10/13 2004/03/31
Rev.
Rev. 0.1 Rev. 0.2 Rev. 0.3 Rev. 0.9 -
Release Note
Preliminary vision Change feature and pin description Add analog performance data Change product name from 8768+ to 8768 Update feature/overview description (Support 96K/24Bit output) Clarify block diagram (no legacy/SBPRO support) Correct pin function (#125 XS6CH=>GND; #90-97 XGD0-XGD7=>NC) Add Electrical Characteristics data and update analog performance
Copyright 2003-2004 (c) C-Media Electronics Inc.
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PCI 8CH Integrated Sound Chip CMI8768 Datasheet Rev 0.9
1. Features
The global first 8CH single sound chip with embedded codec saving customer total BOM cost Full-duplex 8CH DAC/2CH ADC Supports 96K/24bit playback; 48K/16bit recording CE level high-quality Signal-to-Noise Ratio (SNR)~ 100dB Integrated S/PDIF transmitter supports 44.1k/48k/96KHz sample-rate and 16/24bits resolution PCI Rev. 2.2 compliant with bus mastering modes Supports the latest Dolby(R) Digital EX and DTS(R) ES 6.1/7.1CH DVD soundtrack playback Two S/PDIF inputs for optical and coaxial connectors individually Built-in earphone buffer at Front-Out pins (32 loading) One GPIO (General purpose I/O) support External EEPROM Interface for SID R/W purpose Supports MPU401 MIDI UART port DirectSoundTM 3 HW acceleration ACPI compliant power down management Zoomed Video Port support Industrial standard 128-lead QFP package Pin-to-Pin compatible with CMI8738 series Digital power = 3.3V & 5V, Analog power = 5V
Valuable S/W:
C-Media Xear 3DTM 7.1 Virtual Speaker SHIFTER technology Sensaura(R) CRL3D HRTF 3D positional sound enhancement with multi-drive 7.1, EnvironmentFX, ZoomFX, MacroFX, etc. Supports most industrial standards of PC 3D sound for gaming, including EAXTM 1.0&2.0, A3DTM 1.0, and DirectSoundTM 3 SW Unique Karaoke functionality: Mic Echo, Key-shifting, Vocal Cancellation Interesting Magic VoiceTM feature to change users' voice tone for IP phone, online games, and messenger applications 10-band Equalizer with 12 preset modes; 27 global environment effects Support 7.1 CH digital audio playback for WinXP, 2K, ME, 98SE (Microsoft DirectX V.8.1 above is required) Other oncoming features (ASIO driver, NR/AEC,...)
Copyright 2003-2004 (c) C-Media Electronics Inc.
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PCI 8CH Integrated Sound Chip CMI8768 Datasheet Rev 0.9
2. Overview
CMI8768 is the first high performance (SNR~100dB) 8CH PCI integrated sound chip compatible with PCI V.2.2 specification in the world. With 24bit/96K digital/analog playback capability and versatile driver support, CMI8768 is designed delicately for advanced consumer PC sound card/media center/mainboard/desktop/server audio applications. Through integrating a full-duplex 8/2 CODEC and S/PDIF transmitter/receiver, CMI8768 consequently saves much BOM cost for customers. CMI8768, bundled with C-Media friendly and high add-on value driver, provides the most economic and ideal audio solution with the best value-price ratio. Integrated S/PDIF transmitter can deliver 24bit/96K high-definition 5.1 Dolby(R) Digital/DTS(R), or 6.1/7.1 Dolby(R) Digital Surround EX/DTS ES DVD soundtracks and audio stream to external receiver satisfying audio enthusiasts and pioneers. The S/PDIF-Out data can meet the requirement of SCMS (Serial Copy Management System) for digital content serial copy protection legislated by consumer audio industry. CMI8768 also supports MPU-401 MIDI port for external musical instrument input.
Figure 1. Graphic User Interface Samples-- Main Setting & Mixer
Being compatible with various industrial standards for gaming such as EAXTM 1.0&2.0, A3DTM 1.0, Direct SoundTM 3D powered by Sensaura(R) CRL3D HRTF 3D engine, C-Media CMI8768 can provide enthusiastic gamers breathtaking sound experience in gaming. C-Media proprietary Xear 3DTM sound technology empowers users to shift virtual speakers anywhere they want for optimizing the personal sound field. Virtual speakers can even deliver up-to-7.1 channel surround sounds over only 2 physical speakers or headphones. C-Media unique Magic VoiceTM functionality can reform your microphone voice through the recording process delivering amazing disguise effects Copyright 2003-2004 (c) C-Media Electronics Inc. Page 5
PCI 8CH Integrated Sound Chip CMI8768 Datasheet Rev 0.9 for fun in many applications, such as Internet phone, messenger, online games, etc. Microphone echo and key-shifting features are well designed for karaoke application. Other sound effects like 10-band Equalizer and 27 environment effects can enrich users audio experience and enjoyment.
Figure 2. Graphic User Interface Samples--Virtual Speaker SHIFTER & Sound Effect
Figure 3. Graphic User Interface Samples--Karaoke & Magic Voice & Information
Copyright 2003-2004 (c) C-Media Electronics Inc.
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PCI 8CH Integrated Sound Chip CMI8768 Datasheet Rev 0.9
3. Block Diagram
CMI 8768
DMA Engine & IRQ PCI
Interface
Audio DSP Engine
ZV Port
Copyright 2003-2004 (c) C-Media Electronics Inc.
PCI Local Bus
S/PDIF I/O 8CH DAC 2CH ADC
Digital I/O
HP AMP MPU-401 Port
8CH Analog Outputs
PLL (14.318MHz)
Analog Mixer
Line/CD/Aux Inputs
Microphone/PCBeep
Figure 4. Block Diagram
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PCI 8CH Integrated Sound Chip CMI8768 Datasheet Rev 0.9
4. Pin Assignment
Figure 5. Top View of CMI8768
Copyright 2003-2004 (c) C-Media Electronics Inc.
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PCI 8CH Integrated Sound Chip CMI8768 Datasheet Rev 0.9
5. Pin Description
5.1 Digital I/O
Pin No
1-2, 5-7, 12-16, 19-21, 32-35, 38-41, 43-44, 47-52, 126-128 117 119 120 121 122 9 23 24 25 26 29 30 8, 22, 31, 42 88 89 55 56 87 84 85 112 98 86 113
Signal Name
Type
Description
XA31 - XA0
I/O
PCI bus address and data lines
XINTA XPRST XCLK33 XGNT XREQ XIDSEL XFRAME XIRDY XTRDY XDEVSEL XSTOP XPAR XCBE0 XCBE3 XTXD XRXD XIN XOUT XGBIO0 XEECS XMBCSZ ZVCLK XSPDIFO XSPDIFI XSPDIFI2 -
O I I I O I I/O I/O I/O I/O I/O I/O I/O O I I O I/O O I I O I I
Interrupt request, active-low Reset PCI bus clock Bus master grant, active-low. Bus master request, tri-state output, active-low. ID select, active-high. Cycle frame, active-low. Initiator ready, active-low. The bus master device is ready to transmit or receive data. Target ready, active-low. The target device is ready to transmit or receive data. Device select, active-low. The target device has decoded the address of the current transaction as its own chip select range. Stop transaction, active-low. The target device request to the master to stop the current transaction. Parity. The pin indicates even parity across XA31-XA9 and XCBE3-XCBE0 for both address and data phases. Multiplexed command / byte enable. These pins indicate cycle type during the address phase of a transaction. MIDI transmit data MIDI receive data 14.318 MHz crystal input or ext. oscillator input 13.318 MHz crystal output or NC General purpose I/O EEPROM chip select Audio chip enable select (low:enable) ZV port clock S/PDIF output S/PDIF input 1 / ZV port LR channel clock S/PDIF input 2 (TTL 5V) / ZV port data input
Copyright 2003-2004 (c) C-Media Electronics Inc.
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PCI 8CH Integrated Sound Chip CMI8768 Datasheet Rev 0.9
5.2 Analog I/O
Pin No
57,58 59 64,65 66,67 68 69 70 71,72 73,74 75,76 77,78 79 80
Signal Name
XSUROUTL-R EXTBAS XADOUTL-R XADCFL-R XCNOUT XBSOUT XCDGND XCDL-R XREARL-R XLNL-R XAUXL-R XPCSPKIN XMIC
Type
O O O O O O O O O I I I I
Description
Back surround out L/R channel External bass input Front out L/R channel ADC S/H capacitors Center channel output Bass channel output CD audio differential ground channel output CD audio differential L/R channel output Side surround out L/R channel Line-In L/R channel Aux input L/R channel PC beep or mono input Microphone input
5.3 Power & Ground
Pin No
4, 10, 18, 27, 37, 45, 100, 124 54, 115 83 3, 11, 17, 28, 36, 46, 53, 82, 99, 116, 125 61, 81 60, 82
Signal Name
VDDIO VDDCORE VDD5V
Type
I I I PCI I/O power pin
Description
Core logic power pin PCI I/O power pin
GND
I
Digital ground
AVDD AGND
I I
Analog I/O power pin Analog ground
5.4 NC
Pin No
63, 90-97, 101 - 111, 114, 118, NC 123
Signal Name
Copyright 2003-2004 (c) C-Media Electronics Inc.
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PCI 8CH Integrated Sound Chip CMI8768 Datasheet Rev 0.9
6. Electrical Characteristics
6.1 Maximum Ratings
Parameter
Digital power voltage Analog power voltage Digital Input Voltage Analog Input Voltage Operating temperature range Storage temperature range Maximum power dissipation
Symbol
DVDD AVDD VIND VINA TO TST PDMAX
Min.
3 3 -0.5 -0.5 0 -40
Max.
3.6 5.5 3.6 5.5 70 125 300
Unit
V V V V C C MW
6.2 Recommended Operating Conditions
Parameter
Digital Operating Voltage Analog Operating voltage Operating Ambient Temperature
Symbol
DVDD AVDD TO
Min.
3.135 4.75 0
Typ.
3.3 5 25
Max.
3.465 5.25 70
Unit
V V C
6.3 Power Consumption
Parameter
Power Supply Current (Normal) AVDD (5.0V) DVDD (3.3V)
Min.
-
Typ.
35 10
Max.
-
Unit
mA mA
6.4 Digital Characteristics
PARAMETER
Input high voltage(PCI I/O) Input low voltage (PCI I/O) Output high voltage Output low voltage Input Leakage Current Output Leakage Current SPDIF IN input high voltage SPDIF IN input low voltage SPDIF output high voltage SPDIF output low voltage
Symbol Condition
VIH VIL VOH VOL IIL IOL VIH1 VIL1 VOH1 VOL1 IOH=1.5mA IOL=-0.5mA 0Min.
2.0 -0.5 2.4 0.0 -70 -70 2.6 -
Typ.
0.2 VDD GND
Max.
VDD+0.3 0.8 VDD 0.4 70 70 2.4 -
Unit
V V V V A A V V V V
Copyright 2003-2004 (c) C-Media Electronics Inc.
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PCI 8CH Integrated Sound Chip CMI8768 Datasheet Rev 0.9 Input Pin Capacitance Pin Inductance
Cin Lpin 10 20 pF nH
6.5 AC Characteristics
Parameter
High Clamp Current Low Clamp Current Output Rise Slew Rate Output Fall Slew Rate
Symbol
Ich Icl
Condition
-3Min.
-25+(Vin+1)/0.015 1 1
Max. Units
4 4 mA mA V/ns V/ns
Vdd+4>Vin>=Vdd+1 25+(Vin-Vdd-1)/0.015
SLEWr 0.2Vdd-0.6Vdd load SLEWf 0.6Vdd-0.2Vdd load
Copyright 2003-2004 (c) C-Media Electronics Inc.
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PCI 8CH Integrated Sound Chip CMI8768 Datasheet Rev 0.9
The measurements are performed under the circumstance as: Tambient = 25, AVdd = 5.0V 5%, DVdd = 3.3V 5%, 10k/50pF external load. Input is 1 kHz sine wave; Sampling frequency = 48 kHz; Bandwidth = 20 to 20 kHz; 0dB attenuation; All sound effects such as 3D effects are disabled.
6.6 Analog Performance
Parameter
Minimum
Typical
1.1 0.1 1.1 1.1 1.1 1.1 100 101 86 100 94 85 0.005 0.017 0.015 100
Maximum
1.25 1.25 1.25 22,000 22,000 22,000 28,800 +6 0 +24 0 +22.5
Units
Vrms Vrms Vrms Vrms Vrms Vrms Vrms dB dB dB dB dB dB % % % Hz Hz Hz dB Hz Hz dB dB dB dB dB dB dB dB dB dB dB dB dB dB Page 13
Full Scale Input Voltage: Line Inputs (Mixer) Line Inputs (A/D) Mic Inputs (20dB boost) Full Scale Output Voltage: Front_Out Side_Surround_Out Center / LFE_out Back_Surround_Out SNR (Idle) A/A D/A A/D Dynamic Range (-60dB) A/A D/A A/D THD+N A/A D/A A/D Frequency Response A/A 5 D/A 5 A/D 10 Cross-talk @ 10KHz (A/A) Transition Band 19,200 Stop Band 28,800 Stop Band Rejection Out-Of-Band Rejection Power Supply Rejection Ratio Master Volume Gain (32 steps) Step Size Control Range -54 Analog Input Gain (16 steps) Step Size Control Range -30 Mic Input Gain (16 steps) Step Size Control Range -22 Mic Boost Gain PCSPK Input Gain (4 steps) Step Size Control Range -24 Recording Gain (16 steps) Step Size Control Range 0 Input Impedance Copyright 2003-2004 (c) C-Media Electronics Inc.
-70 -65 -65 1.5 2 3 +20 8 1.5 -
PCI 8CH Integrated Sound Chip CMI8768 Datasheet Rev 0.9
Parameter
Line-In, CD, Aux, PCSPK Mic (w/o Boost) Mic (w/ Boost) Output Impedance Amplifier Output Non-amp Output Output Power Line-Out (Front) @32 Load Line-Out (Front) @10K Load Vrefout
Minimum
-
Typical
60 30 10 2 200 50 0.16 2.25
Maximum
-
Units
K K K mW mW V
Copyright 2003-2004 (c) C-Media Electronics Inc.
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PCI 8CH Integrated Sound Chip CMI8768 Datasheet Rev 0.9
7. Mechanical Dimensions
Figure 6. Mechanical Dimension
Symbols
A1 A2 b C D E e Hd He L L1 Y
Min.
0.25 2.57 0.10 0.10 13.90 19.90 17.00 23.00 0.65 0
Typ.
0.35 2.72 0.20 0.15 14.00 20.00 0.50 17.20 23.20 0.80 1.60 -
Max.
0.45 2.87 0.30 0.20 14.10 20.10 17.40 23.40 0.95 0.08 12
Notes
1. Jedec outlineN/A 2. Datum plane H is located at the bottom of the mold parting line coincident with where the lead exits the body. 3. Dimensions E and D do not include mold protrusion. Allowable protrusion is 0.25 mm per side. Dimensions E and D do include mold mismatch and are determined at datum plane H. 4. Dimension b does not include dambar protrusion.
Unitmm
~The End of Datasheet~
Copyright 2003-2004 (c) C-Media Electronics Inc. Page 15

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