PIC16C73A datasheet(2/4 Pages) MICROCHIP

Part #	PIC16C73A

Description	Errata Sheet for Rev. B PIC16C73A Silicon

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Manufacturer	MICROCHIP [Microchip Technology]

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2 / 4 page

DS30390C/73A/B1E1-page 2

PIC16C73A

4.

Module: SSP

When the SPI is using Timer2/2 as the clock source,

a shorter-than-expected SCK pulse may occur on

the first bit of the transmitted/received data.

Example:

Work Around

To avoid producing the short pulse, turn off Timer2

and clear the TMR2 register, load the SSPBUF with

the data to transmit, and then turn Timer2 back on.

Example Code:

BSF

STATUS, RP0

;Bank 1

LOOP BTFSS SSPSTAT, BF

;Data received?

;(Xmit complete?)

GOTO

LOOP

;No

BCF

STATUS, RP0

;Bank 0

MOVF

SSPBUF, W

;W = SSPBUF

MOVWF RXDATA

;Save in user RAM

MOVF

TXDATA, W

;W = TXDATA

BCF

T2CON, TMR2ON

;Timer2 off

CLR

TMR2

;Clear Timer2

MOVWF SSPBUF

;Xmit New data

BSF

T2CON, TMR2ON

;Timer2 on

SD0

SCK

Write SSPBUF

bit0=1 bit1=0 bit2=1 . . . .

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