AT34C02C View Datasheet(PDF) - Atmel Corporation

Part Name

Description

MFG CO.

AT34C02C

Two-wire Automotive Temperature Serial EEPROM with Permanent and Reversible Software Write Protect

Atmel Corporation 

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AT34C02C

STANDBY MODE: The AT34C02C features a low-power standby mode which is enabled: (a)

upon power-up or (b) after the receipt of the STOP bit and the completion of any internal

operations.

2-WIRE SOFTWARE RESET: After an interruption in protocol, power loss or system reset, any

2-wire part can be protocol reset by following these steps (a) Create a start bit condition, (b)

Clock 9 cycles, (c) Create another start bit followed by a stop bit condition as shown below. The

device is ready for next communication after above steps have been completed.

Start Bit

Dummy Clock Cycles

Start Bit

SCL

1

2

3

8

9

Stop Bit

SDA

Figure 2. Bus Timing SCL: Serial Clock SDA: Serial Data I/O

Figure 3. Write Cycle Timing SCL: Serial Clock SDA: Serial Data I/O

SCL

SDA

8th BIT

WORDn

ACK

STOP

CONDITION

(1)

twr

START

CONDITION

Note: 1. The write cycle time tWR is the time from a valid stop condition of a write sequence to the end of the internal clear/write cycle.

5

5242B–SEEPR–01/09

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