PCA9671BS NXP [NXP Semiconductors], PCA9671BS Datasheet - Page 14
PCA9671BS
Manufacturer Part Number
PCA9671BS
Description
Remote 16-bit I/O expander for Fm+ I2C-bus with reset
Manufacturer
NXP [NXP Semiconductors]
Datasheet
1.PCA9671BS.pdf
(34 pages)
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Fig 17. Read input port register, scenario 1
SCL
SDA
read from port 0
data into port 0
read from port 1
data into port 1
S
START condition
Transfer of data can be stopped at any moment by a STOP condition. When this occurs, data present at the latest acknowledge phase is valid (output mode).
1
0
2
1
3
0
4
0 A2 A1 A0 1
5
6
acknowledge
DATA 00
from slave
7
DATA 10
R/W
8
9
A
DATA 00
P0x
acknowledge
from master
DATA 11
A
DATA 11
P1x
acknowledge
from master
A
DATA 00
P0x
acknowledge
from master
DATA12
A
DATA 12
P1x
no acknowledge
from master
002aac251
1
P
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