Datasheet

PIC17C7XX
DS30289C-page 172  1998-2013 Microchip Technology Inc.
FIGURE 15-36: BUS COLLISION DURING START CONDITION (SCL = 0)
FIGURE 15-37: BRG RESET DUE TO SDA COLLISION 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.
TBRG
TBRG
SDA = 0, SCL = 1
BCLIF
S
SSPIF
Interrupts cleared
in software.
Bus collision occurs, Set BCLIF.
SCL = 0 before BRG time-out,
'0'
'0'
'0'
'0'
SDA
SCL
SEN
Set S
Set SEN, enable START
sequence if SDA = 1, SCL = 1.
Less than T
BRG
TBRG
SDA = 0, SCL = 1
BCLIF
S
SSPIF
S
Interrupts cleared
in software.
Set SSPIF.
SDA = 0, SCL = 1
SDA pulled low by other master.
Reset BRG and assert SDA.
SCL pulled low after BRG
Time-out.
Set SSPIF
'0'