PIC16F737-I Datasheet, PDF (131/276 Pages) Microchip Technology – 28/40/44-Pin, 8-Bit CMOS Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology

PIC16F7X7
FIGURE 10-27: BUS COLLISION DURING START CONDITION (SCL = 0)
SDA
SDA = 0, SCL = 1
TBRG
TBRG
SCL
SEN
BCLIF
Set SEN, enable Start
sequence if SDA = 1, SCL = 1
SCL = 0 before BRG time-out,
bus collision occurs. Set BCLIF.
S
‘0’
SSPIF ^{‘0’}
SCL = 0 before SDA = 0,
bus collision occurs. Set BCLIF.
Interrupt cleared
in software
‘0’
‘0’
FIGURE 10-28: BRG RESET DUE TO SDA ARBITRATION DURING START CONDITION
SDA
SDA = 0, SCL = 1
Set S
Less than TBRG
TBRG
SDA pulled low by other master.
Reset BRG and assert SDA.
Set SSPIF
SCL
SEN
BCLIF
S
SCL pulled low after BRG
time-out
Set SEN, enable Start
sequence if SDA = 1, SCL = 1
‘0’
S
SSPIF
SDA = 0, SCL = 1,
set SSPIF
Interrupts cleared
in software
 2004 Microchip Technology Inc.
DS30498C-page 129