PIC16F684

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m (Configuring I/O)

Revision as of 16:52, 11 July 2006

Contents

Overview

For a complete list of features, see this printout from the datasheet.

IMPORTANT: See PIC16F684 Registers for detailed information on registers.

Pinout

Pic16f684 pinout.png
Description of Pinout Labels
Label Description
V_{DD}\, + 5 V
V_{SS}\, Ground
V_{REF}\, External Voltage Reference
RA\#/RC\#\, PORTA/PORTC Programmable I/O
AN\#\, A/D Channel
INT\, External Interrupt Input
P1A/B/C/D\, PWM Output

Initialization

Configuring I/O

INIT_IO	
	BANK0
	CLRF 		PORTA 			;Init PORTA - initially set to LOW
	MOVLW 	B'000101'			;Set RA<0> as input
	MOVWF 		TRISA 			;	and set RA<5:1>
								;	as outputs
	BANK1
	CLRF 		PORTC 			;Init PORTC - initially set to LOW
	MOVLW 	B'000000'			;Set RC<5:0> as outputs
	MOVWF 		TRISC

	CLRF		ANSEL			;Set all pins initially to digital I/O
	MOVLW	B'000001'
	MOVWF		ANSEL			;Set AN<0> (RA<0>) to Analog input
								;	RA<5:1> remain digital I/O
	RETURN

Setting Up for PWM Output

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