TCA9555_16 Datasheet, PDF (20/46 Pages) Texas Instruments – Low-Voltage 16-Bit I2C and SMBus I/O Expander with Interrupt Output and Configuration Registers

TCA9555
SCPS200D – JULY 2009 – REVISED JULY 2016
Programming (continued)
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Master controls SDA line
Slave controls SDA line
Device (Slave) Address (7 bits)
Register Address 0x02 (8 bits)
Data Byte to Register 0x02 (8 bits)
S 0 1 0 0 A2 A1 A0 0 A 0 0 0 0 0 1 0 0 A D7 D6 D5 D4 D3 D2 D1 D0 A P
START
R/W=0 ACK
ACK
Figure 27. Write to the Polarity Inversion Register
ACK STOP
SCL
123 456 78 9
Slave Address
Command Byte
Data to Port 0
SDA _{S 0 1 0 0 A2 A1 A0 0 A 0 0 0 0 0 0 1 0 A} 0.7
Data 0
Start Condition
Write to Port
R/W Acknowledge
From Slave
Acknowledge
From Slave
Data to Port 1
0.0 A 1.7
Data 1
Acknowledge
From Slave
1.0 A P
Data Out from Port 0
Data Out from Port 1
t_pv
Figure 28. Write to Output Port Registers
Data Valid
t_pv
20
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