Datasheet

PCA9548A All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 5 — 31 March 2014 11 of 30
NXP Semiconductors
PCA9548A
8-channel I
2
C-bus switch with reset
7.5 Bus transactions
Data is transmitted to the PCA9548A control register using the Write mode as shown in
Figure 12
.
Data is read from PCA9548A using the Read mode as shown in Figure 13.
Fig 12. Write control register
Fig 13. Read control register
002aab205
B7 B6 B5 B4 B3 B2 B1 B01 1 0 A2 A1 A0 0 AS 1 A P
slave address
START condition R/W acknowledge
from slave
acknowledge
from slave
control register
SDA
STOP condition
002aab206
B7 B6 B5 B4 B3 B2 B1 B01 1 0 A2 A1 A0 1 AS 1 NA P
slave address
START condition R/W acknowledge
from slave
no acknowledge
from master
control register
SDA
STOP condition
last byte