PIC18F45J10 FAMILY
FIGURE 16-27:
BUS COLLISION DURING START CONDITION (SCLx = 0)
SDAx = 0, SCLx = 1
TBRG
TBRG
SDAx
Set SEN, enable Start
sequence if SDAx = 1, SCLx = 1
SCLx
SEN
SCLx = 0before SDAx = 0,
bus collision occurs. Set BCLxIF.
SCLx = 0before BRG time-out,
bus collision occurs. Set BCLxIF.
BCLxIF
Interrupt cleared
in software
S
‘0’
‘0’
‘0’
‘0’
SSPxIF
FIGURE 16-28:
BRG RESET DUE TO SDAx ARBITRATION DURING START CONDITION
SDAx = 0, SCLx = 1
Set S
Set SSPxIF
Less than TBRG
TBRG
SDAx pulled low by other master.
Reset BRG and assert SDAx.
SDAx
SCLx
S
SCLx pulled low after BRG
time-out
SEN
Set SEN, enable Start
sequence if SDAx = 1, SCLx = 1
‘0’
BCLxIF
S
SSPxIF
Interrupts cleared
in software
SDAx = 0, SCLx = 1,
set SSPxIF
© 2009 Microchip Technology Inc.
DS39682E-page 189
MICROCHIP [ MICROCHIP ]
