Datasheet

 2010-2012 Microchip Technology Inc. DS41452C-page 221
PIC16(L)F1516/7/8/9
FIGURE 21-34: BUS COLLISION DURING START CONDITION (SCL = 0)
FIGURE 21-35: 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
TBRG
TBRG
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 TBRG
TBRG
SDA = 0, SCL = 1
BCLIF
S
SSPIF
S
Interrupts cleared
by software
set SSPIF
SDA = 0, SCL = 1,
SCL pulled low after BRG
time-out
Set SSPIF
’0’
SDA pulled low by other master.
Reset BRG and assert SDA.
Set SEN, enable Start
sequence if SDA =
1, SCL = 1