5

5242B–SEEPR–01/09

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.

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

Note:

1. The write cycle time t

SCL

SDA

12

38

9

Start Bit

Start Bit

Stop Bit

Dummy Clock Cycles

t

wr

(1)

STOP

CONDITION

START

CONDITION

WORDn

ACK

8th BIT

SCL

SDA