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I2C Registers
I2CMSA[
Current
0]
State
R/S
BURST
0
0
0
0
1
0
1
1
1
Idle
1
1
1
0
0
1
1
(1)
An X in a table cell indicates the bit can be 0 or 1.
226
2
Inter-Integrated Circuit (I
C) Interface
Table 7-6. Write Field Decoding for I2CMCS[6:0]
I2CMCS[6:0]
QCCMD
HS
ACK
(1)
0
0
0
X
0
0
0
X
1
0
0
X
1
0
0
X
0
0
0
0
0
1
0
0
0
1
0
0
0
0
0
0
0
0
0
1
1
0
0
0
1
0
0
0
1
0
0
1
0
0
1
0
1
0
1
0
0
0
0
1
0
0
0
1
Copyright © 2019, Texas Instruments Incorporated
STOP
START
RUN
START condition followed by TRANSMIT (master
0
1
1
goes to Master Transmit state).
START condition followed by a TRANSMIT and STOP
1
1
1
condition (master remains in Idle state).
START condition followed by N FIFO-serviced
0
1
0
TRANSMITs (master goes to Master Transmit state).
START condition followed by N FIFO-serviced
1
1
0
TRANSMITs and STOP condition (master remains in
Idle state).
START condition followed by RECEIVE operation with
0
1
1
negative ACK (master goes to Master Receive state).
Quick Command (Send). After Quick Command is
1
1
1
executed, the master returns to Idle state.
Quick Command (Receive). After Quick Command is
1
1
1
executed, the master returns to Idle state.
START condition followed by RECEIVE and STOP
1
1
1
condition (master remains in Idle state).
START condition followed by RECEIVE (master goes
0
1
1
to Master Receive state).
START condition followed by N FIFO-serviced
RECEIVE operations with a negative ACK on the last
0
1
0
RECEIVE operation (master goes to Master Receive
state).
START condition followed by N FIFO-serviced
RECEIVE operations with a negative ACK on the last
1
1
0
RECEIVE and STOP condition (master remains in
Idle state).
START condition followed by N FIFO-serviced
0
1
0
RECEIVE operations (master goes to Master Receive
state).
START/RUN condition where master byte is sent with
no ACK; followed by High-Speed transmit Operation.
0
1
1
All subsequent transfers are carried out using normal
transmit commands.
RUN/BURST condition where master byte is sent with
0
0
0
no ACK; followed by High-Speed Burst transmit
Operation.
1
1
1
Illegal
1
1
0
Illegal
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SWRU543 – January 2019
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