Datasheet

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PCA9539_PCA9539R All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved. Product data sheet Rev. 8 — 26 November 2014 11 of 38 NXP Semiconductors
PCA9539; PCA9539R
16-bit I
2
C-bus and SMBus low power I/O port with interrupt and reset
Fig 10. Write to output port registers
1101A1A00AS1
START condition R/W acknowledge
from slave
002aad725
A
SCL
SDA A
write to port
data out
from port 0
P
t
v(Q)
987654321
command byte
data to port 0
DATA 0
slave address
00000100
STOP
condition
0.00.7
acknowledge
from slave
acknowledge
from slave
data to port 1
DATA 1 1.01.7
A
data out
from port 1
t
v(Q)
DATA VALID
Fig 11. Write to configuration registers
1101A1A00AS1
START condition R/W
acknowledge
from slave
002aad726
A
SCL
SDA A P
987654321
command byte
data to register
DATA 0
slave address
00001100
STOP
condition
LSBMSB
acknowledge
from slave
acknowledge
from slave
data to register
DATA 1
LSBMSB
A