PIC18F67J11T-I Datasheet, PDF (280/466 Pages) Microchip Technology – 64/80-Pin, High-Performance, 1-Mbit Flash Microcontrollers

PIC18F87J11 FAMILY
FIGURE 20-29: BUS COLLISION DURING START CONDITION (SCLx = 0)
SDAx = 0, SCLx = 1
SDAx
TBRG
TBRG
SCLx
Set SEN, Enable Start
Sequence if SDAx = 1, SCLx = 1
SEN
BCLxIF
SCLx = 0 Before BRG Time-out,
Bus Collision Occurs; Set BCLxIF
S
‘0’
SSPxIF ‘0’
SCLx = 0 Before SDAx = 0,
Bus Collision Occurs; Set BCLxIF.
Interrupt Cleared
in Software
‘0’
‘0’
FIGURE 20-30: BRG RESET DUE TO SDAx ARBITRATION DURING START CONDITION
SDAx = 0, SCLx = 1
Less than TBRG
Set S
TBRG
SDAx SDAx Pulled Low by Other Master;
Reset BRG and Assert SDAx
Set SSPxIF
SCLx
SEN
BCLxIF
S
SCLx Pulled Low After BRG
Time-out
Set SEN, Enable Start
Sequence if SDAx = 1, SCLx = 1
‘0’
S
SSPxIF
SDAx = 0, SCLx = 1,
Set SSPxIF
Interrupts Cleared
in Software
DS39778E-page 280
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