PIC18F6620 Microchip, PIC18F6620 Datasheet - Page 195

• Manufacturer Part Number: PIC18F6620
• Description: Microcontroller
• Manufacturer: Microchip

FIGURE 17-27:
FIGURE 17-28:
 2004 Microchip Technology Inc.
SDA
SCL
SEN
BCLIF
S
SSPIF
S
BCLIF
SSPIF
SDA
SCL
SEN
PIC18F6520/8520/6620/8620/6720/8720
BUS COLLISION DURING START CONDITION (SCL = 0)
BRG RESET DUE TO SDA ARBITRATION DURING START CONDITION
‘0’
SDA pulled low by other master.
Reset BRG and assert SDA.
‘0’
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’
‘0’
DS39609B-page 193