PCA9505 NXP [NXP Semiconductors], PCA9505 Datasheet - Page 16

• Manufacturer Part Number: PCA9505
• Description: 40-bit I2C-bus I/O port with RESET, OE and INT
• Manufacturer: NXP [NXP Semiconductors]

Fig 11. Write to the 5 output ports
Fig 12. Write to a specific output port
SDA
write to port
data out from port
OE is LOW to observe a change in the outputs.
If more than 5 bytes are written, previous data are overwritten.
OE is LOW to observe a change in the outputs.
Two, three, or four adjacent banks can be programmed by using the Auto-Increment feature (AI = 1) and change at the corresponding output port becomes effective at
each acknowledge.
S
START condition
0 1 0 0 A2 A1 A0 0
slave address
acknowledge
from slave
R/W
A
SDA
write to port
data out from port
AI = 1
1 0 0 0 1 0 0 0
S
START condition
command register
0 1 0 0 A2 A1 A0 0
output bank
register bank 0
is selected
slave address
acknowledge
from slave
acknowledge
from slave
A
R/W
DATA BANK 0
A
acknowledge
AI 0 0 0 1 D2 D1 D0 A
from slave
A
t
v(Q)
DATA BANK 1
acknowledge
acknowledge
from slave
from slave
data valid
bank 0
A
DATA BANK X
DATA BANK 2
acknowledge
from slave
data valid
acknowledge
bank 1
from slave
A
A
A
DATA BANK 3
t
v(Q)
P
STOP
condition
acknowledge
from slave
002aab497
data valid
data X
bank 2
valid
A
DATA BANK 4
acknowledge
from slave
data valid
bank 3
condition
STOP
A
P
002aab496
data valid
bank 4