pca8575 NXP Semiconductors, pca8575 Datasheet - Page 9

• Manufacturer Part Number: pca8575
• Description: Remote 16-bit I/o Expander For I2c-bus With Interrupt
• Manufacturer: NXP Semiconductors

Fig 12. Read input port register, scenario 1
SCL
SDA
read from port 0
data into port 0
read from port 1
data into port 1
INT
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
t
v(D)
4
0 A2 A1 A0 1
5
6
acknowledge
DATA 00
DATA 10
from slave
7
R/W
8
9
A
t
d(rst)
DATA 00
P0x
acknowledge
from master
A
DATA 11
DATA 11
P1x
acknowledge
from master
A
DATA 00
DATA 12
P0x
acknowledge
from master
A
DATA 12
P1x
no acknowledge
from master
002aab810
1
P