PIC16C774T-I/SO View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16C774T-I/SO

28/40-Pin, 8-Bit CMOS Microcontrollers w/ 12-Bit A/D

Microchip Technology 

PIC16C77X

FIGURE 8-36: 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 8-37: 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.

DS30275B-page 92

Advance Information

 1999-2013 Microchip Technology Inc.

Share Link: