PCA9535 Philips Semiconductors, PCA9535 Datasheet - Page 7

• Manufacturer Part Number: PCA9535
• Description: 16-bit I2C and SMBus/ low power I/O port with interrupt
• Manufacturer: Philips Semiconductors

FROM PORT 0
FROM PORT 1
WRITE TO
DATA OUT
DATA OUT
PORT
SDA
SDA
SCL
SCL
start condition
start condition
S
S
1
1
0
0
2
2
1
1
3
3
0
0
slave address
slave address
4
0
4
0
A2 A1 A0
A2 A1 A0
5
5
6
6
7
7
R/W acknowledge
R/W acknowledge
8
0
8
0
9
A
9
A
from slave
from slave
0
0
1
0
0
2
Figure 7. WRITE to configuration registers
Figure 6. WRITE to output port registers
0
0
3
command byte
command byte
0
0
4
0
0
5
0
1
6
1
1
7
0
0
8
A
A
acknowledge
from slave
9
acknowledge
from slave
MSB
0.7
1
2
3
data to port 0
data to register
DATA 0
DATA 0
4
5
6
7
LSB
0.0
t
pv
8
A
9
A
acknowledge
from slave
acknowledge
from slave
MSB
1.7
1
2
3
DATA 1
DATA 1
data to port 1
data to register
4
5
DATA VALID
t
LSB
SU01443
1.0
pv
SU01442
A
A
P
P