AT24C01A_04 データシートの表示（PDF） - Atmel Corporation

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AT24C01A_04

Two-wire Automotive Serial EEPROM

Atmel Corporation 

STANDBY MODE: The AT24C01A/02/04/08/16 features a low-power standby mode

which is enabled: (a) upon power-up and (b) after the receipt of the Stop bit and the

completion of any internal operations.

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

wire part can be reset by following these steps:

1. Clock up to 9 cycles.

2. Look for SDA high in each cycle while SCL is high.

3. Create a start condition.

Bus Timing

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

Write Cycle Timing

Figure 3. SCL: Serial Clock, SDA: Serial Data I/O

SCL

SDA

8th BIT

WORDn

ACK

STOP

CONDITION

twr(1)

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.

6 AT24C01A/02/04/08/16

3256F–SEEPR–10/04

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