Datasheet

SCL
SDA
INT
Start
Condition
R/W
ReadFrom
Port
DataInto
Port
Stop
Condition
ACKFrom
Master
NACKFrom
Master
ACKFrom
Slave
DataFromPort
Slave Address DataFromPort
1 9
R
765432
00
1
S
00
0
AD
DR
1
A
Data1 Data4
A NA P
Data2 Data3 Data4
Data5
INT iscleared
byReadfromPort
Stopnotneeded
toclear INT
t
ph
t
ps
t
ir
t
iv
TCA6416A
www.ti.com SCPS194A –MAY 2009–REVISED NOVEMBER 2009
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 10).
Figure 11. Read Input Port Register
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