TCA9546A Datasheet, PDF (13/31 Pages) Texas Instruments – Low Voltage 4-Channel I2C and SMBus Switch with Reset Function

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Programming (continued)
TCA9546A
SCPS205A – APRIL 2014 – REVISED FEBRUARY 2015
Data Output
by Transmitter
Data Output
by Receiver
NACK
ACK
SCL From
Master
S
Start
Condition
1
2
8
Figure 10. Acknowledgment on the I²C Bus
9
Clock Pulse for ACK
Data is transmitted to the TCA9546A control register using the write mode shown in Figure 11.
Slave Address
Control Register
SDA ^{S 1 1 1 0 A2 A1 A0 0 A X X X X B3 B2 B1 B0 A P}
Start Condition
R/W ACK From Slave
ACK From Slave Stop Condition
Figure 11. Write Control Register
Data is read from the TCA9546A control register using the read mode shown in Figure 12.
Slave Address
Control Register
SDA S 1 1 1 _{0 A2 A1 A0} 1 A _{0 0 0 0 B3 B2 B1 B0 NA} P
Start Condition
R/W ACK From Slave
NACK From Master Stop Condition
Figure 12. Read Control Register
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