PIC16F882-I/SPQTP View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16F882-I/SPQTP

28/40/44-Pin Flash-Based, 8-Bit CMOS Microcontrollers

Microchip Technology 

PIC16F882/883/884/886/887

FIGURE 13-22: 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

Interrupt cleared

in software

‘0’

‘0’

FIGURE 13-23: 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

 2006-2012 Microchip Technology Inc.

DS41291G-page 209

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