TCA6408A-Q1 Datasheet, PDF (17/40 Pages) Texas Instruments – Low-Voltage 8-Bit I2C and SMBus I/O Expander With Interrupt Output

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Functional Block Diagrams (continued)
TCA6408A-Q1
SCPS234 – SEPTEMBER 2016
Data From
Shift Register
Data From
Shift Register
Write Configuration
Pulse
Write Pulse
Configuration
Register
DQ
FF
C_K Q
Read Pulse
Data From
Shift Register
Write Polarity Pulse
DQ
FF
C_K Q
Output
Port
Register
Output Port
Register Data
V _CCP
Q1
Input
Port
Register
DQ
FF
C_K Q
DQ
FF
C_K Q
Polarity
Inversion
Register
P0 to P7
Q2
ESD Protection Diode
GND
Input Port
Register Data
To INT
Polarity
Register Data
Copyright © 2016, Texas Instruments Incorporated
On power up or reset, all registers return to default values.
Figure 22. Simplified Schematic of P0 to P7
Copyright © 2016, Texas Instruments Incorporated
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