TCA6416 Datasheet, PDF (12/31 Pages) Texas Instruments – LOW-VOLTAGE 16-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS

TCA6416
LOW-VOLTAGE 16-BIT I²C AND SMBus I/O EXPANDER
WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS
SCPS153 – DECEMBER 2007
www.ti.com
SCL
123456789
I0.x
I1.x
I0.x
I1.x
SDA
S
0
1
0
0
0
0
AD
DR
1
A
Data 1 1 A
Data 2
A
Data 3
A
Data 4
1P
Read From
Port 0
Data Into
Port 0
Read From
Port 1
Data Into
Port 1
INT
R/W Acknowledge
From Slave
Acknowledge
From Master
Acknowledge
From Master
Acknowledge
From Master
No Acknowledge
From Master
t_iv
t_ir
A. Transfer of data can be stopped at any time by a Stop condition. When this occurs, data present at the latest
acknowledge phase is valid (output mode). It is assumed that the command byte previously has been set to 00 (read
Input Port register).
B. This figure eliminates the command byte transfer, a restart, and slave address call between the initial slave address
call and actual data transfer from P port (see Figure 8).
Figure 9. Read Input Port Register
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