Datasheet

PIC16C77X
DS30275B-page 92 Advance Information  1999-2013 Microchip Technology Inc.
FIGURE 8-36: BUS COLLISION DURING START CONDITION (SCL = 0)
FIGURE 8-37: 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
T
BRG
T
BRG
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
T
BRG
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
Timeout
Set SSPIF
'0'
774.book Page 92 Tuesday, January 29, 2013 12:02 PM