Datasheet

 2013 Microchip Technology Inc. DS22331A-page 177
MCP19111
FIGURE 27-26: BUS COLLISION DURING START CONDITION (SCL = 0)
FIGURE 27-27: BRG RESET DUE TO SDA ARBITRATION DURING START CONDITION
SDA
SCL
SEN
bus collision occurs. Set BCLIF.
SCL = 0 before SDA = 0,
Set SEN, enable Start
sequence if SDA = 1, SCL = 1
T
BRG
T
BRG
SDA = 0, SCL = 1
BCLIF
S
SSPIF
Interrupt cleared
by software
bus collision occurs. Set BCLIF.
SCL = 0 before BRG time-out,
’0’’0’
’0’’0’
SDA
SCL
SEN
Set S
Less than T
BRG
T
BRG
SDA = 0, SCL = 1
BCLIF
S
SSPIF
S
Interrupts cleared
by software
set SSPIF
SDAx = 0, SCL = 1,
SCLx pulled low after BRG
time-out
Set SSPIF
’0’
SDA pulled low by other master.
Reset BRG and assert SDAx.
Set SEN, enable Start
sequence if SDA = 1, SCL = 1