pca9535d NXP Semiconductors, pca9535d Datasheet - Page 12

• Manufacturer Part Number: pca9535d
• Description: 16-bit I2c And Smbus, Low Power I/o Port With Interrupt
• Manufacturer: NXP Semiconductors

Fig 11. Read Input Port register, scenario 1
SDA
read from port 0
data into port 0
read from port 1
data into port 1
SCL
INT
S
START condition
Remark: 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).
It is assumed that the command byte has previously been set to ‘00’ (read Input Port register).
1
0
2
1
t
v(INT_N)
slave address
3
0
4
0 A2 A1 A0 1
5
6
acknowledge
from slave
7
R/W
8
9
A
7
t
6
rst(INT_N)
5
4
I0.x
3
acknowledge
2
from master
1
0
A
7
6
5
4
I1.x
3
acknowledge
2
from master
1
0
A
A
7
6
5
4
I0.x
3
acknowledge
2
from master
1
0
A
7
6
5
4
I1.x
3
non acknowledge
2
from master
STOP condition
1
0
002aac223
1
P