PIC17C752 MICROCHIP [Microchip Technology], PIC17C752 Datasheet - Page 162

• Manufacturer Part Number: PIC17C752
• Description: High-Performance 8-Bit CMOS EPROM Microcontrollers
• Manufacturer: MICROCHIP [Microchip Technology]

FIGURE 15-39: BUS COLLISION DURING START CONDITION (SCL = 0)
FIGURE 15-40: BRG RESET DUE TO SDA COLLISION DURING START CONDITION
DS30264A-page 162
S
BCLIF
SSPIF
SDA
SCL
SEN
S
SDA
SCL
SEN
BCLIF
SSPIF
SCL = 0 before BRG time out,
Bus collision occurs, Set BCLIF.
SDA goes low early.
Reset BRG and assert SDA
Set SEN, enable start
sequence if SDA = 1, SCL = 1
Set SEN, enable start
sequence if SDA = 1, SCL = 1
SDA = 0, SCL = 1
SDA = 0, SCL = 1
Set S, SSPIF
Less than T
T
BRG
SDA = 0, SCL = 1
Set S, SSPIF
BRG
Preliminary
S
T
T
BRG
BRG
SCL = 0 before SDA = 0,
Bus collision occurs, Set BCLIF.
Interrupts cleared
in software.
Interrupts cleared
in software.
1997 Microchip Technology Inc.