8574A 데이터 시트보기 (PDF) - Philips Electronics

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8574A

Remote 8-bit I/O expander for I2C-BUS

Philips Electronics 

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SCL

12 345 678

slave address (PCF8574)

data to port

SDA S 0 1 0 0 A2 A1 A0 0 A

DATA 1

start condition

WRITE TO

PORT

R/W acknowledge

from slave

data to port

A

DATA 2

acknowledge

from slave

A

acknowledge

from slave

DATA OUT

FROM PORT

DATA 1 VALID

DATA 2 VALID

t pv

t pv

MBD974

Fig.11 WRITE mode (output).

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