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MGL542

S

0

1

0

0

A2

A1

A0

0

A

P07 P06

P00

P17

P10

1

start condition

R/W

P05

acknowledge

from slave

A

A

SDA

SCL

Integral multiples of two bytes

WRITE TO

PORT

tpv

IOHt

DATA OUTPUT

FROM PORT

P05 OUTPUT

VOLTAGE

P05 PULL-UP

OUTPUT CURRENT

INT

slave address (PCF8575)

data to port 0

data to port 1

12

345

678

IOH

acknowledge

from slave

acknowledge

from slave

tir

Data A0 and

B0 valid

Fig.9 WRITE mode (output).