PIC16C717-I/SS View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16C717-I/SS

18/20-Pin, 8-Bit CMOS Microcontrollers with 10/12-Bit A/D

Microchip Technology 

PIC16C717/770/771

FIGURE 9-33: BUS COLLISION DURING START CONDITION (SCL = 0)

SDA

SDA = 0, SCL = 1

TBRG

TBRG

SCL

Set SEN, enable start

sequence if SDA = 1, SCL = 1

SEN

BCLIF

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.

Interrupts cleared

in software.

’0’

’0’

FIGURE 9-34: BRG RESET DUE TO SDA COLLISION 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 ’0’

s

SCL pulled low after BRG

Timeout

Set SEN, enable start

sequence if SDA = 1, SCL = 1

S

SSPIF

SDA = 0, SCL = 1

Set SSPIF

Interrupts cleared

in software.

© 1999 Microchip Technology Inc.

Advanced Information

DS41120A-page 105

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