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Features
* Integrated Temperature Sensor (TS) + 2Kbit Serial EEPROM * Jedec (JC42.4) SO-DIMM SPD + TS compliant * Standard voltage operation Optimized for voltage range: 2.7V to 3.6V * 100khz and 400khz Compatibility * Two-wire Serial Interface: I C/SMBusTM compatible SMBus Timeout supported * Schmitt Trigger, filtered inputs for Noise Suppression * Industry Standard Green (Pb/Halide-free/RoHS Compliant) Package Options 8-pad Very Very Thin DFN (2 x 3 x 0.8mm)
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Serial EEPROM Features
* Permanent and Reversible Software Write Protection for the First-half of the Array Software Procedure to Verify Write Protect Status * Internally organized as one block of 256-bytes (256 x 8) * Supports Byte and Page Write operation Write 1-, 2-, 3-, up to 16-bytes at a time * Self-timed Write cycle (5ms max) * High-reliability Endurance: 1 Million Write Cycles Data Retention: 100 years * Low Operating current EEPROM Write ~1.5mA (typ.) EEPROM Read ~ 0.2mA (typ.)
Integrated Temperature Sensor with Serial Electrically-erasable and Programmable Read-only Memory Atmel AT30TSE002B Preliminary
Temperature Sensor Features
* 11-bit ADC Temp-to-Digital Converter with 0.125C resolution * Programmable hysteresis threshold: off, 0C, 1.5C, 3C, 6 C * B-grade Accuracy 1C (max.) for +75C to +95C 2C (max.) for +40C to +125C 3C (max.) for -20C to +125C * Low Operating current Temperature Sensor Active ~ 0.2mA (typ.)
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Table 0-1. Pin Name A0, A1, A2 SDA SCL
Pin Configuration Description Address Inputs Serial Data Serial Clock Input
EVENT
VCC EVENT SCL SDA
8-WDFN
8 7 6 5 1 2 3 4 A0 A1 A2 GND
Temperature Alert GND VCC
Ground Power Supply
Bottom View
Description
Atmel(R) AT30TSE002B is a combination serial EEPROM and temperature sensor device containing 2048-bits of serially electrically-erasable and programmable read only memory (EEPROM) organized as 256-bytes of 8-bits each and could be used to store memory module and vendor information. The EEPROM operation is tailored specifically for DRAM Memory Modules Serial Presence Detect (SPD). The first 128-bytes of the memory incorporate a permanent and a reversible software write protection (WP) feature. Once the permanent software WP is enabled, by sending a special command, it cannot be reversed. However, once the reversible software WP is enabled, it can be reversed by sending a special command. The integrated temperature sensor converts temperatures from -20C to +125C to a digital word and provides an accuracy of 1C (max.) in the temperature range +75C to +95C. The temperature sensor continuously monitors temperature and updates data in the temperature register at least eight times per second. Temperature data is latched internally by the device and may be read by software via a microcontroller at anytime. The AT30TSE002B has flexible user programmable internal registers to configure the temperature sensor performance and response to over temperature conditions. The device contains programmable high, low, and critical temperature limits. The device EVENT pin is configured as active low and can be configured to operate as an interrupt or as a comparator output. Manufacturer and Device ID registers provide the ability to confirm the identity of the device. The AT30TSE002B supports the industry standard 2-wire I2C/ SMBus serial Interface to include time out feature to help prevent system lock-ups.
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Atmel AT30TSE002B [Preliminary]
8711D-SEEPR-8/10
Temperature Sensor with Serial EEPROM
1. Absolute Maximum Ratings
Operating Temperature ................ - 40C to +125C Storage Temperature ................. - 65C to + 150C Voltage on Any Pin with Respect to Ground ......................- 1.0 V +5.0V Pin A0 ..................................................- 1.0 V +12V Maximum Operating Voltage............................ 4.3V DC Output Current ........................................ 5.0mA *NOTICE: Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification are not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Figure 1-1.
Block Diagram
Serial EEPROM Temperature Sensor
H.V. Pump/Timing
Selected Resolution Temp. Range Capability Accuracy Output Features EVENT Shutdown SMBus
EEPROM Write Protected Section (00h-7Fh)
X Address Decoder
Configuration Critical Alarm Trip
EEPROM Second half (80h-FFh)
Device ID Manufacturer ID Temperature Upper Alarm Trip
A/D Converter
Y Address Decoder
Memory Control Logic
Write Protect Circuitry
Lower Alarm Trip SMBus Timeout Band Gap Temperature Sensor
Pointer Register
Serial Control Logic
I2C / SMBus Interface
Vcc
GND
SCLK
SDA
EVENT
A0
A1
A2
3
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2.
Pin Description
Atmel(R) AT30TSE002B requires no external components for operation except for pull-up resistors on SCL, SDA, and EVENT pins. In order to provide effective noise protection and filtering, it is recommended that a decoupling capacitor of 0.1F be used and is located as close as possible to the device between VCC and ground pins. SERIAL CLOCK (SCL): The SCL input is used to positive edge clock data into each EEPROM device and negative edge clock data out of each device. SERIAL DATA (SDA): The SDA pin is bidirectional for serial data transfer. This pin is open drain driven and may be wire-ORed with any number of other open-drain or open collector devices. Device Addresses (A2, A1, A0): The A2, A1, and A0 pins are device address inputs that are hardwired (directly to GND or to VCC) for compatibility with two-wire devices. When the pins are hardwired, as many as eight devices may be addressed on a single bus system. A device is selected when a corresponding hardware and software match is true. If these pins are left floating, the A2, A1, and A0 pins will be internally pulled to GND. However, Atmel recommends always connecting the address pins to a known state by direct connection to ground or VCC but if using a pull-up resistor, Atmel recommends using 10k ohm or less. The A0 pin is also overvoltage tolerant, allowing up to 10V for software write protection functionality. (See Section 4 through Section 7) Temperature Alert Output (EVENT): The EVENT pin outputs a signal when the temperature goes beyond the userprogrammed temperature limits and be configured in one of three modes; either Interrupt, comparator or critical alarm modes. The
EVENT
pin is an open-drain output and requires a pull-up resistor for proper operation (see Section 8).
Pin Capacitance(1)
Table 2-1.
Applicable over recommended operating range from TA = 25C, f = 100 kHz, VCC = +3.0V Symbol CI/O CIN Note: Test Condition Input/Output Capacitance (SDA), EVENT Input Capacitance (A0, A1, A2, SCL) 1. This parameter is ensured by characterization only Max 8 6 Units pF pF Conditions VI/O = 0V VIN = 0V
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Atmel AT30TSE002B [Preliminary]
8711D-SEEPR-8/10
Temperature Sensor with Serial EEPROM
Table 2-2. DC Characteristics Applicable over recommended operating range: TAI = -20C to +125C, VCC = +2.7v to +3.6V (unless otherwise noted) Symbol Parameter VCC1 Supply Voltage Test Condition Min 2.7 Typ Max 3.6 Units V
Supply Current ICC ICC ICC ICC ISB ILI ILO VIL VIH VOL VHV VHYST TCONV TRES EEPROM READ VCC = 3.6V (2) EEPROM WRITE VCC = 3.6V (2) Temp. Sensor VCC = 3.6V Timeout active VCC = 3.6V Standby Current VCC =3.6V(3) Input Leakage Current Output Leakage Current Input Low Level(1) Input High Level(1) Output Low level VCC = 3.0V High Voltage Input A0 Input Hysteresis (SDA, SCL) Temp. Sensor Conversion Time Temp. Sensor Resolution IOL = 2.1mA Pin = A0; VHV - VCC 4.8V 7 0.05 x VCC 75 0.25 125 100kHz 100kHz EEPROM inactive EEPROM inactive, Temp. Sensor shutdown Vin = VHV = or VSS Vin = VHV = or VSS Vin = VHV = or VSS -0.6 VHV x0.7 0.4 1.5 0.2 0.2 1.6 0.1 0.1 1.0 3.0 0.5 0.5 4.0 2.0 2.0 VHV x 0.3 VHV + 0.5 0.4 10 mA mA mA mA uA uA uA V V V V V mS C
Temperature Sensor Accuracy TACCUR TACCUR TACCUR TCONV TRES Note: +75C < Ta < +95C +40C < Ta < +125C -20C < Ta < +125C Temp. Sensor Conversion Time Temp. Sensor Resolution 1. VIL min and VIH max are reference only and are not tested 2. Sensor in Shutdown Mode 3. EEPROM inactive, sensor in shutdown mode -1.0 -2.0 -3.0 0.5 1 2 75 0.25 +1.0 +2.0 +3.0 125 C C C mS C
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Table 2-3. AC Characteristics Applicable over recommended operating range: TAI = -20C to +125C, VCC = +2.7v to +3.6V, CL = 1 TTL Gate and 100F (unless otherwise noted) Symbol FSCL TLOW THIGH TI TBUF THD.STA TSU.STA THD.DI TSU.DAT TR TF TSU.STO THD.DAT TWR TOUT EEPROM Endurance(1) Note: Parameter Clock Frequency, SCL Clock Pulse Width Low Clock Pulse Width High Noise Suppression Time(1) Time the bus must be free before a new transmission can start(1) Start Hold Time Start Set-up Time Data In Hold Time Data In Set-up Time Inputs Rise Time(1) Inputs Fall Time(1) Stop Set-up Time Data Out Hold Time Write Cycle Time SMBus Timeout Time 25C, Page Mode 25 4.7 200 3450 5 35 1 Million 25 4.7 4.0 4.7 0 200 1.0 300 0.6 200 900 5 35 Min 10
(2)
Max 100
Min 10
(2)
Max 400
Units kHz us us
4.7 4.0 100
1.2 0.6 50 1.2 0.6 0.6 0.0 100 0.3 300
ns us us us us ns us ns us ns ms ms Write cycles
1. This parameter is ensured by characterization only 2. The minimum frequency is specified at 10Khz to avoid activating the timeout feature
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Atmel AT30TSE002B [Preliminary]
8711D-SEEPR-8/10
Temperature Sensor with Serial EEPROM
3. Memory Organization
Atmel(R) AT30TSE002B, 2K Serial EEPROM: The 2K memory is internally organized with 16 pages of 16-bytes each. Random word addressing requires an 8-bit data word address.
4.
Device Operation
CLOCK and DATA TRANSITIONS: The SDA pin is normally pulled high with an external device. Data on the SDA pin may change only during SCL low time periods. (see Figure 4-4) Data changes during SCL high periods will indicate a start or stop condition as defined below. START CONDITION: A high-to-low transition of SDA with SCL high is a start condition which must precede any other command (see Figure 4-5). STOP CONDITION: A low-to-high transition of SDA with SCL high is a stop condition. After a read sequence, the stop command will place the device in a standby power mode (see Figure 4-5). ACKNOWLEDGE: All addresses and data words are serially transmitted to and from the EEPROM in 8-bit words. The device sends a zero to acknowledge that it has received each word. This happens during the ninth clock cycle. STANDBY MODE: The AT30TSE002B features a low-power standby mode which is enabled: a) Upon power-up b) After the receipt of the STOP bit and the completion of any internal operations. The temperature sensor must be disabled by the user for low-power standby mode. Two-Wire Software Reset: After an interruption in protocol, power loss or system reset, any two-wire part can be reset by following these steps: a) Create a start bit condition b) Clock nine cycles c) Create another start bit followed by stop bit condition as shown below. The device is ready for next communication after the above steps have been completed.
Figure 4-1. Two-Wire Software Reset
Start Bit Dummy Clock Cycles Start Bit Stop Bit
SCL
1
2
3
8
9
SDA
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Figure 4-2.
Bus Timing SCL: Serial Clock SDA: Serial Data I/O
tHIGH tLOW
SCL
tHD:STA tSU:STO tBUF
SDA IN
tSU:STA
SDA input
tHD:DI
SDA change
tSU:DAT
STOP condition
START condition
SCL
tHD:DAT
SDA OUT
Data Valid
Figure 4-3.
Write Cycle Timing SCL: Serial Clock SDA: Serial Data I/O
SCL
tSU:STA tSU:STO
SDA OUT
tW STOP condition Write cycle START condition
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Atmel AT30TSE002B [Preliminary]
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Temperature Sensor with Serial EEPROM
Figure 4-4. Data Validity
Figure 4-5.
Start and Stop Condition
Figure 4-6.
Output Acknowledge
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5.
Device Addressing
Atmel(R) AT30TSE002B device requires an 8-bit device address word following a start condition to enable the chip to access either the Temperature Sensor or EEPROM functions (See Table 5-1).
Table 5-1. Control/Device Address Word Control / Device Address Word Device B7 EEPROM Temperature Sensor EEPROM Write Protection Note: X = User Selectable 1 0 0 Device ID B6 0 0 1 B5 1 1 1 B4 0 1 0 X X X X Device Address Bits A2 A1 A0 R/W B0
The EEPROM device address word consists of a mandatory one-zero sequence for the first four most significant bits (`1010') for normal read and write operations, a `0110' for writing to the EEPROM write protect register and `0011' for Temperature Sensor operations. The next three bits are the A2, A1 and A0 device address bits for the AT30TSE002B device. These three bits must match their corresponding hard-wired input pins. The eighth bit of the device address is the read/write operation select bit. A read operation is initiated if this bit is high and an EEPROM write operation is selected if this bit is low. Upon a compare of the device address, the device will output a zero, called an Acknowledge (ACK). If a compare is not made, the chip will not ACK and will return to a standby state. The EEPROM will not ACK if the write protect register has been programmed and the control code is `0110'.
6.
EEPROM Write Operations
BYTE WRITE: A write operation requires an 8-bit data word address following the device address word and ACK. Upon receipt of this address, the EEPROM will again respond with an ACK and then clock in the first 8-bit data word. Following receipt of the 8-bit data word, the EEPROM will output an ACK and the addressing device, such as a microcontroller, must terminate the write sequence with a stop condition. At this time the EEPROM enters an internally timed write cycle, tWR, to the nonvolatile memory. All inputs are disabled during this write cycle and the EEPROM will not respond until the write is complete (see Figure 11-2 and Figure 11-3). The device will acknowledge a write command, but not write the data, if the software write protection has been enabled. The write cycle time must be observed even when the write protection is enabled. PAGE WRITE: The 2K EEPROM device is capable of 16-byte page write. A page write is initiated the same as a byte write, but the microcontroller does not send a stop condition after the first data word is clocked in. Instead, after the EEPROM acknowledges receipt of the first data word, the microcontroller can transmit up to fifteen more data words. The EEPROM will respond with a zero after each data word received. The microcontroller must terminate the page write sequence with a stop condition (see Figure 11-3). The data word address lower four bits are internally incremented following the receipt of each data word. The higher data word address bits are not incremented, retaining the memory page row location. When the word address, internally generated, reaches the page boundary, the following byte is placed at the beginning of the same page. If more than sixteen data words are transmitted to the EEPROM, the data word address will "roll over" and previous data will be overwritten. The address "roll over" during write is from the last byte of the current page to the first byte of the same page. The device will acknowledge a write command, but not write the data, if the software write protection has been enabled. The write cycle time must be observed even when the write protection is enabled.
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Atmel AT30TSE002B [Preliminary]
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Temperature Sensor with Serial EEPROM
ACKNOWLEDGE (ACK) POLLING: Once the internally-timed write cycle has started and the EEPROM inputs are disabled, ACK polling can be initiated. This involves sending a start condition followed by the device address word. The read/write bit is representative of the operation desired. Only if the internal write cycle has completed will the EEPROM respond with a zero allowing the read or write sequence to continue.
7.
EEPROM Write Protection
The device supports permanent and reversible software write protection and, once enabled, write protects the first-half of the array (00H - 7FH). PERMANENT SOFTWARE WRITE PROTECTION: The software write protection is enabled by sending a command similar to a normal write command; to the device which programs the permanent write protect register. The write protect register is programmed by sending a write command with the device address of `0110' with the address and data bit being don't cares (see Table 9-16 and Table 10-1). Once the software write protection has been enabled, the device will no longer acknowledge the `0110' control byte. The software write protection cannot be reversed even if the device is powered down. The write cycle time must be observed. REVERSIBLE SOFTWARE WRITE PROTECTION: The reversible software write protection is enabled by sending a command, similar to a normal write command; to the device which programs the reversible write protect register. The write protect register is programmed by sending a write command `01100010' with pins A2 and A1 tied to ground or no connect and pin A0 connected to VHV (see Figure 10-6 and Table 10-1). The reversible write protection can be reversed by sending a command `01100110' with pin A2 tied to ground or no connect, pin A1 tied to VCC and pin A0 tied to VHV (see Figure 10-6 and Table 10-2).
8.
Temperature Sensor Functional Description
Atmel(R) AT30TSE002B consists of a Delta-Sigma Analog to Digital Converter (ADC) with a band gap type temperature sensor that monitors and updates its own temperature reading at least eight times per second converting the readings into digital data bits and latching them into a temperature register that can be read via 2wire I2C/SMBus serial interface. The device communicates over a 2-wire I2C/SMBus interface with the bus master or controller consisting of a serial clock (SCL) and serial bidirectional data bus (SDA) with clock frequencies up to 400Khz. The bus master or controller generates the SCL signal and is used by the AT30TSE002B to receive and send serial data on the SDA line with the most significant bit transferred first. A pull-up resistor is required on the SDA pin since it is in an open drain configuration.
8.1.
EVENT Output
The EVENT pin has three operating modes depending on configuration settings. They are Interrupt, Comparator, and Critical Alarm (Crit_Alarm) modes. In the Interrupt mode, once a temperature reaches a boundary limit, the AT30TSE002B asserts the EVENT pin. The EVENT pin will remain asserted until software clears the interrupt by writing a "1" to the EVTCLR bit five in the configuration register. When the temperature drops below specified limits, the device returns back to either interrupt or comparator mode as programmed in the configuration register's EVTMOD bit zero. In the comparator mode, the EVENT pin remains asserted until the error condition that caused the pin to be asserted no longer exists and the EVENT pin will clear itself. In the Crit_Alarm mode, when the measured temperature exceeds Crit_Alarm trip limit, the EVENT pin will remain asserted until the temperature drops below Crit_Alarm limit minus hysteresis (See Figure 9-1). All event thresholds use hysteresis as programmed in the configuration register.
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8.2.
Alarm Window
The alarm window consists of the Upper Alarm Trip Register and Lower Alarm Trip Register. The Upper Alarm Trip Register holds the upper temperature trip point and the Lower Alarm Trip Register holds the lower temperature trip point. After the EVENT pin control is enabled, the EVENT output will be triggered upon entering and exiting from this window.
8.3.
Temperature Sensor Power-on Default
The Atmel(R) AT30TSE002B has an internal Power-on Reset (POR) circuit. When the supply voltage drops below the POR threshold, the device will reset to the following power-on default conditions: * Sensor starts monitoring temperature continuously * Address Pointer Register = 00h * Upper / Lower Alarm Trip registers and Crit_Alarm registers are set to 0C * *
EVENT
register cleared and pulled high by external pull up resistor hysteresis is 0C
* Operational mode is Comparator
EVENT
* SMBus register =00h
8.4.
Device Initialization
The AT30TSE002B Temperature Sensor has programmable registers that, upon device power-on, are initialized to `0'. Table 9-1 shows the power-on register default values. The EVENT output is defaulted to deasserted state and comparator mode. Please note the Upper Alarm Trip, Lower Alarm Trip, Critical Alarm Trip registers and Configuration registers need to be programmed to desired values before temperature sensor can properly function.
8.5.
SMBus Timeout
The AT30TSE002B supports the SMBus timeout feature for temperature sensor operations if enabled via setting the SMBus register (see Section 9.10). This feature helps prevent potential system bus hang-ups by resetting the serial interface if SCL stays low for a time specified by the tOUT parameter. This requires a minimum SCL clock speed of 10Khz as specified in the SMBus specification to avoid any timeout issues.
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Atmel AT30TSE002B [Preliminary]
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Temperature Sensor with Serial EEPROM
9. Register Descriptions
This section describes all the temperature sensor registers that are used in Atmel(R) AT30TSE002B. The AT30TSE002B has several registers that are user accessible and or programmable and used for latching temperature readings, storing high and low temperature limits, configuring the hysteresis threshold and reporting status. These registers include the Capability Register, Upper Alarm Trip Register, Lower Alarm Trip Register, Critical Alarm Trip Register, Temperature Register, Manufacturer Identification Register, Device Identification Register and SMBus Register. The AT30TSE002B uses an 8-bit Pointer Register to access these registers and all other registers contain 16-bits. The below, Table 9-1, indicates the Write / Read access capability of each register. Reading from a write only register will result in reading `0' data and writing to read only register will have no impact even though the write sequence was acknowledged by the device.
Table 9-1. Register Summary Registers Address (hex) n/a 00h 01h 02h 03h 04h 05h 06h 07h 08h to 21h 22h 23h to FFh Note: Read / Write W R R/W R/W R/W R/W R R R R/W R/W R/W Register Name Address Pointer Capability Configuration Upper Alarm Trip Lower Alarm Trip Critical Alarm Trip Temperature Data Manufacturer I.D. Device I.D. / Device Revision Reserved (1) SMBus Timeout Reserved (1) Section 9.1 9.2 9.3 9.4 9.5 9.6 9.7 9.8 9.9 n/a 9.10 n/a Power up Default Register data (hex) 00h 00D7h 0000h 0000h 0000h 0000h n/a 001Fh 8201h 0000h 0000h 0000h
1. Write operations to reserve registers should be avoided as it may cause undesirable results
9.1.
Address Pointer Register
The AT30TSE002B uses a Pointer Register to select and access the 16-bit data registers shown in Table 9-1. The Pointer Register is an 8-bit write only register (See Table 9-2). The power on default value is 00h which is the address location for the capability register.
Table 9-2. Bit Symbol R/W Default Value W 0 W 0 W 0 Address Pointer Register 7 6 5 4 3 2 1 0
Pointer Bits W 0 W 0 W 0 W 0 W 0
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9.2.
Capability Register (16-bit Read only, Address = 00h)
The Atmel(R) AT30TSE002B is capable of measuring temperature with 1C over the active range and 2C over the monitor range. This register is a 16-bit read-only register used to specify the capabilities of the temperature sensor. The Capability Register functions are described in Table 9-3 and Table 9-4.
Table 9-3. Bit Symbol Default Value R / W access Bit Symbol Default Value R / W access 0 R 7 EVSD 1 R 0 R 6 TMOUT 1 R 0 R 5 VHV 1 R 1 R 0 R 4 TPRES 0 R Capability Register Bit Distribution 15 14 13 12 RFU 0 R 3 0 R 2 RANGE 1 R 0 R 1 SACC 1 R 0 R 0 ICAP 1 R 11 10 9 8
Table 9-4. Bit 15:8 7
Capability Register Bit Description Symbol RFU EVSD Description Reserved for Future Use and must be '0' Event Output Status During Shutdown Mode 1 = The EVENT pin output is deasserted (not driven) when entering shutdown mode and will resume status update immediately upon exiting shutdown. In addition, the EVTSTS bit in the configuration register will be cleared when entering shutdown mode and will resume status update immediately upon exiting shutdown.
6
TMOUT
Bus Timeout 1 = Supported within the SMBus compatible range 25 to 35mS (power-up default)
5
VHV
High Voltage Support for A0 pin
1 = A0 Pin supports a voltage up to 10 volts (power up default) 4:3 TPRES Temperature resolution '10' - supports 0.125C 2 1 0 RANGE SACC ICAP '1' - Can read temperatures below 0C and sets appropriate sign bit Supported Accuracy. '1' - Supports B grade accuracy of 1C over the active range (75C to 95C) and 2C over the monitor range (40C to 125C ) Interrupt Capability. '1' - has alarm and critical trip interrupt capability
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Atmel AT30TSE002B [Preliminary]
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Temperature Sensor with Serial EEPROM
9.3. Configuration Register (16-bit Read/Write, Address = 01h)
The Atmel(R) AT30TSE002B contains a 16-bit Configuration Register allowing the user to set key operational features of the Temperature Sensor. The Configuration Register functions are described in Table 9-5 and Table 9-6.
Table 9-5. Bit Symbol Default Value R / W access Bit Symbol Default Value R / W access 0 R 7 0 R 6 Configuration Register Bit Distribution 15 14 13 RFU 0 R 5 EVTCLR 0 W 0 R 4 EVTSTS 0 R 0 R 3 EVTOUT 0 R/W 0 R/W 2 CRITEVT 0 R/W 12 11 10 HYSTENB 0 R/W 1 EVTPOL 0 R/W 9 8 SHTDWN 0 R/W 0 EVTMOD 0 R/W
CRTALML WINLOCK 0 R/W 0 R/W
Table 9-6. Bit 15:11 10:9
Configuration Register Bit Description Symbol RFU HYSTENB Reserved for Future Use and must be '0'. Hysteresis Enable '00' = 0C Disable hysteresis (default power-on condition) '01' = 1.5C Enable hysteresis `10' = 3.0C Enable hysteresis `11' = 6.0C Enable hysteresis The purpose of these bits is to control the hysteresis applied to the alarm trip point boundaries. The above hysteresis applies to all limits when temperature drops below the user specified alarm trip points. Please note that hysteresis applies to decreasing temperature only. Once ambient temperature is above a given threshold, it must drop below the boundary limit minus hysteresis in order for a comparator EVENT to be cleared. For example, if these bits are set to `01' for 1.5C and the Upper Alarm Trip limit is set to 85C, as temperature rises above 85C, bit 14 of temperature register will be set to a `1'. Bit 14 will remain set until the ambient temperature drops below the threshold (85C) minus the hysteresis value or 83.5C. Note that hysteresis is also applied to the EVENT pin functionality. When either of the Crit_Alarm Trip or Alarm Window lock bits is set, this bit cannot be altered until unlocked. Description
8
SHTDWN
Shutdown Mode 0 = Temperature sensor enabled for continuous conversion (power-on default) 1 = Temperature sensor disabled In Shutdown mode, the temperature sensor is not active and will not generate interrupts or update temperature data. The EVENT pin is deasserted (not driven) When either of the Crit_Alarm Trip or Alarm Window lock bits is set, this bit cannot be altered until unlocked
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Bit 7
Symbol CRTALML Crit_Alarm Trip Lock bit
Description
Locks the Critical Alarm Trip register from being updated 0 = Crit_Alarm Trip register can be updated (Power-on default) 1 = Crit_Alarm Trip register is locked and cannot be updated Once set, it can be only be cleared to `0' by internal power on reset (POR) which occurs when the device is powered off and then powered on 6 WINLOCK Alarm Window Lock bit 0 = Upper and Lower Alarm Trip Registers can be updated (Power-on default) 1 = Upper and Lower Alarm Trip Registers are locked and cannot be updated Once set, it can be only be cleared to `0' by internal power on reset (POR) when device is powered off then powered on 5 EVTCLR
EVENT
Clear. This bit is a Write only bit and will read `0'
This bit can clear the EVENT pin after it has been enabled and is self clearing 0 = has no effect (power-on default) 1 = clears (releases) the active EVENT pin in interrupt mode. This bit is ignored when in comparator mode 4 EVTSTS
EVENT
Pin Output Status
0 = The EVENT Output is not asserted by the device. (Power-on default) 1 = The EVENT Output is asserted due to an alarm trip condition Please note this bit will be cleared when entering shutdown mode and will resume status update immediately upon exiting shutdown 3 EVTOUT
EVENT Output
Control
This bit, when set, prevents the EVENT pin from generating an interrupt 0 = The EVENT output is disabled and will not generate interrupts (Power-on default) 1 = The EVENT output is enabled When either of the Crit_Alarm Trip or Alarm Window lock bits is set, this bit cannot be altered until unlocked 2 CRITEVT Critical Temperature only 0 = The EVENT output is asserted for the Upper, Lower and Critical Alarms (Power-on default) 1 = The EVENT output is asserted for only Critical Alarm when ambient temperature > Crit_Alarm trip boundary When the Alarm Window lock bit is set, this bit cannot be altered until unlocked 1 EVTPOL
EVENT Polarity
0 = Active LOW. (Power-on default) A pull-up resistor is required on this pin to set inactive state 1 = Active HIGH When either of the Crit_Alarm Trip or Alarm Window lock bits is set, this bit cannot be altered until unlocked 0 EVTMOD
EVENT Mode
0 = The EVENT pin will operate in Comparator mode. (Power-on default) 1 = The EVENT pin will operate in Interrupt mode When either of the Crit_Alarm Trip or Alarm Window lock bits is set, this bit cannot be altered until unlocked
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Atmel AT30TSE002B [Preliminary]
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Temperature Sensor with Serial EEPROM
Figure 9-1.
EVENT Pin Mode Functionality
Crit_Alarm
Upper Ala rm Measured Temperature
Lower Alarm
Software Resets Inter rupt
Switches to Compa rator Mode
EVENT pin in "Interrupt Mode" (active low)
EVENT pin in "Compa rator Mode" (active low)
9.4.
Upper Alarm Trip Register (16-bit Read/Write, Address = 02h)
The Upper Alarm Trip Register holds the user programmed upper temperature boundary trip point in 11-bit two's complement format (0.25C resolution) that can be used to monitor ambient temperature in an operating window (See Table 9-7 and Table 9-8). When the temperature increases above this trip point, or drops below or is equal to the trip point (minus any hysteresis set), then the EVENT pin is asserted (if enabled). This register becomes read only if the Alarm Window Lock bit (WINLOCK) bit six in the configuration register is set to a `1'.
Table 9-7. Bit Symbol Default Value R / W access 0 R Upper Alarm Trip Register Bit Distribution 15 14 RFU 0 R 0 R 13 12 SIGN 0 R/W 0 R/W 0 R/W 11 10 ALMWINH 0 R/W 0 R/W 9 8
Bit Symbol Default Value R / W access
7
6
5 ALMWINH
4
3
2
1 RFU
0
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R
0 R
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8711D-SEEPR-8/10
Table 9-8. Bit 15:13 12
Upper Alarm Trip Register Bit Description Symbol RFU SIGN Description Reserved for future use. Read as `0' Sign bit 0 = Ambient temperature is greater than or equal to 0C 1= Ambient temperature is less than 0C
11:2
ALMWINH
Upper Alarm Trip temperature bits Represented in two's complement format
0:1
RFU
Reserved for future use. Read as `0'
9.5.
Lower Alarm Trip Register (16-bit Read/Write, Address = 03h)
The Lower Alarm Trip Register holds the user programmed lower temperature boundary trip point in 11-bit two's complement format (0.25C resolution) that can be used to monitor ambient temperature in an operating window (See Table 9-9 and Table 9-10). When temperature decreases below this trip point minus any hysteresis set or increases to meet or exceed this trip point, then the EVENT pin is asserted (if enabled). This register becomes read only if the Alarm Window Lock bit (WINLOCK) bit six in the Configuration register is set to a `1'.
Table 9-9. Bit Symbol Default Value R / W access 0 R Lower Alarm Trip Register Bit Distribution 15 14 RFU 0 R 0 R 13 12 SIGN 0 R/W 0 R/W 0 R/W 11 10 ALMWINL 0 R/W 0 R/W 9 8
Bit Symbol Default Value R / W access
7
6
5 ALMWINL
4
3
2
1 RFU
0
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R
0 R
Table 9-10. Lower Alarm Trip Register Bit Description Bit 15:13 12 Symbol RFU SIGN Description Reserved for future use. Read as `0' Sign bit 0 = Ambient temperature is greater than or equal to 0C 1= Ambient temperature is less than 0C 11:2 ALMWINL Lower Alarm Trip temperature bits Represented in two's complement format 0:1 RFU Reserved for future use. Read as `0'
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Atmel AT30TSE002B [Preliminary]
8711D-SEEPR-8/10
Temperature Sensor with Serial EEPROM
9.6. Critical Alarm Trip Register (16-bit Read/Write, Address = 04h)
The Critical Alarm Trip Register holds the user programmed Critical Alarm temperature boundary trip point in 11-bit two's complement format (0.25C resolution) that can be used to monitor ambient temperature (See Table 9-11 and Table 9-12). When the temperature increases above this trip point, the EVENT pin will be asserted (if enabled). It will remain asserted until temperature decreases below or equal to the trip point minus any hysteresis set. This register becomes read only if the Critical Alarm Trip Lock Bit (CRTALML) bit seven in the configuration register is set to a `1'.
Table 9-11. Critical Alarm Trip Register Bit Distribution Bit Symbol Default Value R / W access 0 R 15 14 RFU 0 R 0 R 13 12 SIGN 0 R/W 0 R/W 0 R/W 11 10 CRITEVT 0 R/W 0 R/W 9 8
Bit Symbol Default Value R / W access
7
6
5 CRITEVT
4
3
2
1 RFU
0
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R
0 R
Table 9-12. Critical Alarm Trip Register Bit Description Bit 15:13 12 Symbol RFU SIGN Description Reserved for future use. Read as `0' Sign bit 0 = Ambient temperature is greater than or equal to 0C 1= Ambient temperature is less than 0C 11:2 CRITEVT Critical Alarm Trip temperature bits Represented in two's complement format 0:1 RFU Reserved for future use. Read as `0'
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8711D-SEEPR-8/10
9.7.
Temperature Register (16-bit Read only, Address = 05h)
The Temperature Register holds the internal temperature measurement data represented in 11-bit 2's complement word format allowing for resolution equal to 0.125C (least significant bit). The upper three bits (15, 14, 13) of the temperature register indicates the trip status of the current temperature and most important, are not affected by the status of the output of the EVENT pin (See Table 9-13 and Table 9-14).
Table 9-13. Temperature Register Bit Distribution Bit Symbol Default Value R / W access 15 14 13 ALMLOW 0 R 12 SIGN 0 R 11 128C 0 R 10 64C 0 R 9 32C 0 R 8 16C 0 R
CRITHIGH ALMHIGH 0 R 0 R
Bit Symbol Default Value R / W access
7 8C 0 R
6 4C 0 R
5 2C 0 R
4 1C 0 R
3 0.5C 0 R
2 0.25C 0 R
1 0.125C 0 R
0 RFU 0 R
Table 9-14. Temperature Register Bit Description Bit 15 Symbol CRITHIGH Description 0 = Ambient temperature is less than the Critical Alarm Trip Register setting 1 = Ambient temperature is greater than or equal to Critical Alarm Trip Register setting When this bit is set `1', it will automatically clear once the measured temperature decreases below or is equal to the trip point minus any hysteresis set 14 ALMHIGH 0 = Ambient temperature is below the Upper Alarm Trip register setting 1 = Ambient temperature is above the Upper Alarm Trip register setting When the bit is set `1', it will automatically clear once the measured temperature decreases below or is equal to the trip point minus any hysteresis set 13 ALMLOW 0 = Ambient temperature is above the Lower Alarm Trip register setting 1 = Ambient temperature is below the Lower Alarm Trip register setting When the bit is set `1', it will automatically clear once the measured temperature increases above or is to equal to the trip point 12 SIGN Sign Bit 0 = Ambient temperature is greater than or equal to 0C 1 = Ambient temperature is less than 0C 11:1 TEMP Ambient Temperature Bits Represented in two's complement format The encoding of bits B11 through B2 is the same as in the Alarm Trip registers 0 RFU Reserved for future use. Read as `0'
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Atmel AT30TSE002B [Preliminary]
8711D-SEEPR-8/10
Temperature Sensor with Serial EEPROM
9.7.1. Temperature Register Format
This section will clarify the temperature register format and temperature bit value assignments used for temperature for the following registers: Upper Alarm Trip, Lower Alarm Trip, Critical Alarm Trip and Temperature Data. The temperatures expressed in the Upper Alarm Trip, Lower Alarm Trip, Critical Alarm Trip and Temperature Data Registers are indicated in two's complement format. In each of the trip registers, bits 12 through bit two are used for temperature settings, or in the case of the temperature register, holds the internal temperature measurement with bits 12 through bit one allowing 0.125C resolution. Table 9-15indicates the temperature register's assigned bit values used for temperature. Table 9-16 below shows examples for temperature register bit values for various temperature readings.
Table 9-15. Temperature Register Format Bit Position Bit Value 12 SIGN 11 128C 10 64C 9 32C 8 16C 7 8C 6 4C 5 2C 4 1C 3 2 1 0 X
0.5C 0.25C 0.125C
Table 9-16. Temperature Register Examples Temperature Register Value Examples Temperature +125C +99.75C +85C +39C +15.75C +0.25C 0C -0.25C -1C -20C Binary (Bit15 - Bit0) xxx0 0111 1101 00xx xxx0 0110 0011 11xx xxx0 0101 0101 00xx xxx0 0010 0111 00xx xxx0 0000 1111 11xx xxx0 0000 0000 01xx xxx0 0000 0000 00xx xxx1 1111 1111 11xx xxx1 1111 1110 00xx xxx1 1110 1100 00xx
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8711D-SEEPR-8/10
9.8.
Manufacturer ID Register (16-bit Read only, Address = 06h)
This register is used to identity the manufacturer of the product. The manufacturer ID for the Atmel(R) AT30TSE002B is 001Fh (See Table 9-17).
Table 9-17. Manufacturer ID Register Bit Distribution Bit Symbol Default Value R / W access 0 R 0 R 0 R 15 14 13 12 11 10 9 8
Manufacturer ID 0 R 0 R 0 R 0 R 0 R
Bit Symbol Default Value R / W access
7
6
5
4
3
2
1
0
Manufacturer ID 0 R 0 R 0 R 1 R 1 R 1 R 1 R 1 R
9.9.
Device ID Register (16-bit Read only, Address = 07h)
The upper or high order byte is used to specify the device identification and the other byte is used to specify device revision. The device ID for the AT30TSE002B is 8201h (See Table 9-18).
Table 9-18. Device ID Register Bit Distribution Bit Symbol Default Value R / W access 1 R 0 R 0 R 0 R 15 14 13 12 11 10 9 8
Device ID 0 R 0 R 1 R 0 R
Bit Symbol Default Value R / W access
7
6
5
4
3
2
1
0
Device Revision 0 R 0 R 0 R 0 R 0 R 0 R 0 R 1 R
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Atmel AT30TSE002B [Preliminary]
8711D-SEEPR-8/10
Temperature Sensor with Serial EEPROM
9.10. SMBus Register (16-bit Write / Read only, Address = 22h)
The SMBus Register allows the user to enable or disable the SMBus time out feature (See Table 9-19 and Table 9-20).
Table 9-19. SMBus Register Bit Distribution Bit Symbol Default Value R / W access 0 R 0 R 0 R 0 R 15 14 13 12 RFU 0 R 0 R 0 R 0 R 11 10 9 8
Bit Symbol Default Value R / W access
7 SMBOUT 0 R/W
6
5
4
3 RFU
2
1
0
0 R
0 R
0 R
0 R
0 R
0 R
0 R
Table 9-20. SMBus Register Bit Distribution Bit 15:8 7 Symbol RFU SMBOUT Description Reserved for future use. Read as `0' SMBus Timeout 0 = SMBus timeout is enabled 1 = SMBus timeout is disabled When enabled, timeout is active for temperature sensor operations When either of the Crit_Alarm Trip or Alarm Window lock bits is set, this bit cannot be altered until unlocked 6:0 RFU Reserved for future use. Read as `0'
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8711D-SEEPR-8/10
10.
TS Write Operations
Writing to the Atmel(R) AT30TSE002B Temperature register set is accomplished through a modified write operation for two data bytes. To maintain two-wire compatibility, the 16-bit register is accessed through a pointer register, requiring the write sequence to include an address pointer in addition to the device address. This indicates the storage location for the next two bytes received. Figure 10-2 shows an entire write transaction on the bus.
Figure 10-1.
S T A R T
0
TS Register Write Operation
W R I T E
DEVICE ADDRESS
REGISTER POINTER
DATA MSB
DATA LSB
S T O P
0
1
1 A2 A1 A0
RA /C WK
A C K
A C K
A C K
10.1. TS Read Operations
Reading data from the TS may be accomplished in one of two ways: a) If the location latched in the pointer register is correct (for normal operation it is expected the same address will be read repeatedly for temperature), the read sequence may consist of a device address from the bus master followed by two bytes of data from the device; or b) The pointer register is loaded with the correct register address, and the data is read. The sequence to preset the pointer register is shown in Figure 10-2 and the preset pointer read is shown in Figure 10-3. If it is desired to read random address each cycle, the complete Pointer Write, Word Read sequence is shown in Figure 10-4. The data byte has the most significant bit first. At the end of a read, this device can accept either Acknowledge (Ack) or No Acknowledge (No Ack) from the Master (No Acknowledge is typically used as a signal for the slave that the Master has read its last byte).
Figure 10-2.
S T A R T
0 0
Write to Pointer Register
W R I T E
A1 A0
DEVICE ADDRESS
REGISTER POINTER
S T O P
1
1
A2
R / W
A C K
A C K
Figure 10-3.
S T A R T
0 0
Preset Pointer Register Word Read
R E A D DATA MSB A C K DATA LSB S T O P
DEVICE ADDRESS
1
1
A2 A1 A0
RA /C WK
N O A C K
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Atmel AT30TSE002B [Preliminary]
8711D-SEEPR-8/10
Temperature Sensor with Serial EEPROM
Figure 10-4.
S T A R T
Two-Wire Pointer Write Register Word Read
W R I T E S T A R T
DEVICE ADDRESS
REGISTER POINTER
DEVICE ADDRESS
R E A D
DATA MSB
A C K
DATA LSB
S T O P
0 0 1 1 A2 A1 A0
0 0 1 1 A2 A1 A0
RA /C WK
A C K
RA /C WK
N O A C K
Figure 10-5.
Setting Permanent Write Protect Register (PSWP)
S T A R T
CONTROL BYTE
WORD ADDRESS
DATA
S T O P
SDA LINE
0 1 1 0 A2 A1 A0 0 A C K A C K A C K
= Don't Care
Figure 10-6.
Setting Reversible Write Protect Register (RSWP)
S T A R T
CONTROL BYTE
WORD ADDRESS
DATA
S T O P
SDA LINE
01100010 A C K A C K A C K
= Don't Care
Figure 10-7.
Clearing Reversible Write Protect Register (RSWP)
S T A R T
CONTROL BYTE
WORD ADDRESS
DATA
S T O P
SDA LINE
01100110 A C K A C K A C K
= Don't Care
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8711D-SEEPR-8/10
Table 10-1. EEPROM Write Protection Pin Command A2 Set PSWP Set RSWP Clear RSWP Table 10-2. VHV Min VHV 7 Max 10 Units V A2 0 0 A1 A1 0 1 A0 A0 VHV VHV B7 0 0 0 B6 1 1 1 B5 1 1 1 B4 0 0 0 B3 A2 0 0 B2 A1 0 1 B1 A0 1 1 B0 0 0 0 Preamble RW
Table 10-3. EEPROM Software Write Protection R/W Bit R W W W Permanent Reversible Write Protect Write Protect Acknowledgement Register PSWP Register RSWP from Device Action from Device X Programmed X Not Programmed Programmed X X Programmed Not Programmed ACK ACK ACK ACK Can write to second Half (80H - FFH) only Can write to second Half (80H - FFH) only Can write to full array
Command 1010 1010 1010 1010
Read PSWP
R
X
No ACK
STOP - Indicates permanent write protect register is programmed
Read PSWP
R
Not Programmed Programmed
X
ACK
Read out data don't care. Indicates PSWP register is not programmed
Set PSWP
W
X
No ACK
STOP - Indicates permanent write protect register is programmed
Set PSWP
W
Not Programmed
X
ACK
Program permanent write protect register (irreversible)
Read RSWP Read RSWP Set RSWP Set RSWP
R R W W
X X X X
Programmed Not Programmed Programmed Not Programmed
No ACK ACK No ACK ACK
STOP - Indicates reversible write protect register is programmed Read out data don't care. Indicates RSWP register is not programmed STOP - Indicates reversible write protect register is programmed Program reversible write protect register (reversible)
Clear RSWP
W
Programmed
X
No ACK
STOP - Indicates permanent write protect register is programmed
Clear RSWP
W
Not Programmed
X
ACK
Clear (unprogram) reversible write protect register (reversible)
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Atmel AT30TSE002B [Preliminary]
8711D-SEEPR-8/10
Temperature Sensor with Serial EEPROM
11. EEPROM Read Operations
Read operations are initiated the same way as write operations with the exception that the read/write select bit in the device address word is set to one. There are three read operations: current address read, random address read and sequential read. CURRENT ADDRESS READ: The internal data word address counter maintains the last address accessed during the last read or write operation, incremented by one. This address stays valid between operations as long as the chip power is maintained. The address "roll over" during read is from the last byte of the last memory page to the first byte of the first page. Once the device address with the read/write select bit set to one is clocked in and acknowledged by the EEPROM, the current address data word is serially clocked out. To end the command, the microcontroller does not respond with an input zero but does generate a following stop condition (see Figure 11-4). RANDOM READ: A random read requires a "dummy" byte write sequence to load in the data word address. Once the device address word and data word address are clocked in and acknowledged by the EEPROM, the microcontroller must generate another start condition. The microcontroller now initiates a current address read by sending a device address with the read/write select bit high. The EEPROM acknowledges the device address and serially clocks out the data word. To end the command, the microcontroller does not respond with a zero but does generate a following stop condition (see Figure 11-5). SEQUENTIAL READ: Sequential reads are initiated by either a current address read or a random address read. After the microcontroller receives a data word, it responds with an ACK. As long as the EEPROM receives an ACK, it will continue to increment the data word address and serially clock out sequential data words. When the memory address limit is reached, the data word address will "roll over" and the sequential read will continue. The sequential read operation is terminated when the microcontroller does not respond with a zero but does generate a following stop condition (see Figure 11-6). PERMANENT WRITE PROTECT REGISTER (PSWP) STATUS: To find out if the register has been programmed, the same procedure is used as to program the register except that the R/W bit is set to one. If the device sends an acknowledge, then the permanent write protect register has not been programmed. Otherwise, it has been programmed and the device is permanently write protected at the first half of the array.
Table 11-1. PSWP Status Pin Command A2 Read PSWP A2 A1 A1 A0 A0 B7 0 B6 1 B5 1 B4 0 B3 A2 B2 A1 B1 A0 B0 1 Preamble RW
REVERSIBLE WRITE PROTECT REGISTER (RSWP) STATUS: To find out if the register has been programmed, the same procedure is used as to program the register except that the R/W bit is set to one. If the device sends an acknowledge, then the reversible write protect register has not been programmed. Otherwise, it has been programmed and the device is write protected (reversible) at the first half of the array.
Figure 11-1.
1 MSB 0 1
EEPROM Device Address
0 A2 A1 A0 R/W LSB
27
8711D-SEEPR-8/10
Figure 11-2.
EEPROM Byte Write
Figure 11-3.
EEPROM Page Write
Figure 11-4.
EEPROM Current Address Read
28
Atmel AT30TSE002B [Preliminary]
8711D-SEEPR-8/10
Temperature Sensor with Serial EEPROM
Figure 11-5. EEPROM Random Read
Figure 11-6.
EEPROM Sequential Read
29
8711D-SEEPR-8/10
12.
Ordering Information
12.1. Ordering Code Detail
AT30TSE002B-MAH-T
Atmel Designator Shipping Carrier Option
B = Bulk (tubes) T = Tape and reel
Product Family Device Grade Memory Type
E = EEPROM H = Green, NiPdAu lead finish Temperature range -20C to +125C
Sensor Type
Package Option
MA = 8-pad, 2 x 3 x 0.8mm (WDFN)
Device Density
2 = 2-kilobit
Device Revision
12.2. Green Package Options (Pb/Halide-free/RoHS Compliant)
Ordering Code AT30TSE002B-MAH-T Note: Package Lead Finish 8M2 NiPdAu Operating Voltage 2.7V to 3.6V Max. Freq. (KHz) 400 Operational range -20C to 125C
1. The shipping carrier option code is not marked on the devices
Package Type 8M2 8-pad, 2 x 3 x 0.8mm, Thermally Enhanced Plastic Very Very Thin Dual Flat No Lead Package (WDFN)
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Atmel AT30TSE002B [Preliminary]
8711D-SEEPR-8/10
Temperature Sensor with Serial EEPROM
WDFN Marking
TOP MARK |---|---|---| T 2 B |---|---|---| H @ |---|---|---| Y X X |---|---|---| * | Pin 1 Indicator (Dot) Y = YEAR OF ASSEMBLY XX = ATMEL LOT NUMBER TO COORESPOND WITH TRACE CODE LOG BOOK. (e.g. XX = AA, AB, AC,...AX, AY, AZ) Y= 8: 9: 0: 1: SEAL YEAR 2008 2: 2012 2009 3: 2013 2010 4: 2014 2011 5: 2015
31
8711D-SEEPR-8/10
13.
Package Drawings
8M2 - WDFN
COMMON DIMENSIONS (Unit of Measure - mm) SYMBOL D E D2 E2 A A1 A3 L e b 0.18 0.35 1.35 1.25 0.70 0.0 MIN NOM 2.00 BSC 3.00 BSC 1.40 1.30 0.75 0.02 0.20 REF 0.40 0.50 BSC 0.25 0.30 2 0.45 1.45 1.35 0.80 0.05 MAX NOTE
Notes
1. This drawing is for general information only. Refer to JEDEC Drawing MO-229, WCED-3, for proper dimensions, tolerances, datums, etc 2. Dimensions b applies to metallized terminal and is measured between 0.15mm and 0.30mm from the terminal tip. If the terminal has the optional radius on the other end of the terminal, the dimensions should not be measured in that radius area 3. Soldering the large thermal pad is optional, but not recommended. No electrical connection is accomplished to the device through this pad, so if soldered it should be tied to ground 6/12/09 Package Drawing Contact packagedrawings@atmel.com TITLE 8M2, 8-lead 2.0x3.0mm Body, 0.50mm Pitch, WDFN, Very Very Thin, Dual No Lead Package (Sawn) GPC YDL DRAWING NO. 8M2 REV. A
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Atmel AT30TSE002B [Preliminary]
8711D-SEEPR-8/10
Temperature Sensor with Serial EEPROM
14. Revision History
Doc. Rev. 8711D Date 08/2010 Comments R to R / W for 22h in Register Summary table Correct cross references in EEPROM Write Operations 8711C 8711B 8711A 07/2010 05/2010 04/2010 Section 12.2, change part number to -MAH-T from -MA-T Add statement in Section 2 before Serial Clock definition Initial document release
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8711D-SEEPR-8/10
He ad q ua rt e rs
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In t er n at io n al
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