PCA6416A NXP [NXP Semiconductors], PCA6416A Datasheet - Page 12

• Manufacturer Part Number: PCA6416A
• Description: Low-voltage translating 16-bit I2C-bus/SMBus I/O expander
• Manufacturer: NXP [NXP Semiconductors]

Fig 9.
Fig 10. Write to device registers
Write to Output port register
SDA
write to port
data out from port 0
data out from port 1
SDA
SCL
SCL
S
START condition
S
START condition
1
0
1
0
2
1
2
slave address
1
3
0
slave address
3
0
4
0
4
0
5
0
5
0
6
0
6
0
DR
AD
7
AD
DR
7
R/W
R/W
8
0
8
0
9
A
acknowledge
from slave
9
A
acknowledge
from slave
0
0
0
0
command byte
0
command byte
0
0
0
0
0 1/0 1/0 1/0
0
1
0
A
acknowledge
from slave
A
acknowledge
from slave
0.7
MSB
data to port 0
data to register
DATA 0
DATA 0
t
v(Q)
0.0 A
LSB
acknowledge
from slave
A
acknowledge
from slave
1.7
DATA 0 VALID
MSB
data to port 1
data to register
DATA 1
DATA 1
t
v(Q)
1.0
LSB
A
acknowledge
from slave
A
acknowledge
from slave
DATA 1 VALID
STOP
condition
P
STOP
condition
P
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