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MBD971

S

0

1

1

1

A2

A1

A0

0

A

start condition

1

P3

R/W

acknowledge

from slave

A

0

P3

A

P

SDA

SCL

P3

OUTPUT

VOLTAGE

I OHt

I OH

P3

PULL-UP

OUTPUT

CURRENT

slave address (PCF8574A)

data to port

data to port

12

345

678