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