Datasheet

SCL
Start Condition
Data 1 Valid
SDA
Write to Port
Data Out
From Port
R/W ACK From Slave
ACK From Slave
ACK From Slave
1 98765432
Data 1
101 1S 01 A1 A0 0 A 0000000 A A P
t
pv
Data to PortCommand ByteSlave Address
SCL
SDA
Data to
Register
Start Condition R/W ACK From Slave ACK From Slave ACK From Slave
1 98765432
Data1/001 1S 01 A1 A0 0 A 1000000 A A P
Data to RegisterCommand ByteSlave Address
PCA9538
www.ti.com ................................................................................................................................................ SCPS126E – SEPTEMBER 2006 – REVISED JUNE 2008
Figure 6. Write to Output Port Register
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Figure 7. Write to Configuration or Polarity Inversion Registers
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Product Folder Link(s): PCA9538