Datasheet

SDA
SCL
Data Line
Stable;
Data Valid
Change
of Data
Allowed
Data Output
by Transmitter
SCL From
Master
Start
Condition
S
1 2 8 9
Data Output
by Receiver
Clock Pulse for
Acknowledgment
NACK
ACK
TCA9554
www.ti.com SCPS233A –NOVEMBER 2011–REVISED MARCH 2012
Figure 4. Bit Transfer
Figure 5. Acknowledgment on the I
2
C Bus
Table 2. Interface Definition
BIT
BYTE
7 (MSB) 6 5 4 3 2 1 0 (LSB)
I
2
C slave address L H L L A2 A1 A0 R/W
Px I/O data bus P7 P6 P5 P4 P3 P2 P1 P0
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