PIC18F2221 MICROCHIP [Microchip Technology], PIC18F2221 Datasheet - Page 203

• Manufacturer Part Number: PIC18F2221
• Description: 28/40/44-Pin Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

FIGURE 17-29:
FIGURE 17-30:
© 2007 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
SDA pulled low by other master.
Reset BRG and assert SDA.
‘0’
‘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
Preliminary
SDA = 0, SCL = 1,
set SSPIF
T
Set SEN, enable Start
sequence if SDA = 1, SCL = 1
BRG
S
Set S
T
BRG
T
PIC18F4321 FAMILY
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’
DS39689E-page 201