PIC18LF452 Microchip Technology, PIC18LF452 Datasheet - Page 163

• Manufacturer Part Number: PIC18LF452
• Description: (PIC18LFxx2) Enhanced FLASH Microcontrollers
• Manufacturer: Microchip Technology

FIGURE 15-27:
FIGURE 15-28:
2002 Microchip Technology Inc.
SDA
SCL
SEN
S
BCLIF
SSPIF
S
BCLIF
SSPIF
SDA
SCL
SEN
BUS COLLISION DURING START CONDITION (SCL = 0)
BRG RESET DUE TO SDA ARBITRATION DURING START CONDITION
’0’
’0’
SDA pulled low by other master.
Reset BRG and assert SDA.
SCL = 0 before BRG time-out,
bus collision occurs. Set BCLIF.
Set SEN, enable START
sequence if SDA = 1, SCL = 1
Less than T
BRG
SDA = 0, SCL = 1
SDA = 0, SCL = 1
SDA = 0, SCL = 1
Set SSPIF
T
Set SEN, enable START
sequence if SDA = 1, SCL = 1
BRG
S
Set S
T
BRG
T
BRG
Set SSPIF
SCL = 0 before SDA = 0,
bus collision occurs. set BCLIF
SCL pulled low after BRG
Time-out
Interrupt cleared
in software
Interrupts cleared
in software
’0’
’0’
PIC18FXX2
’0’
DS39564B-page 161