Re: Using 74xx574 D FF to expand PIC outputs

From: Mike <nomtrxspam@xxxxxxxxxxx>
Date: Mon, 16 Jul 2007 16:41:40 -0400

<snip>

Start

BUF0 equ 0x30 ; - 0x33
ADDRESSBUFFER equ 0x40

Setup
bsf STATUS,5 ; set bank 1
movlw b'00000000'
movwf TRISA
movlw b'00000000'
movwf TRISB
bcf STATUS,5 ; set bank 0

clrf PORTA

clrf BUF0
clrf BUF0+1
clrf BUF0+2
clrf BUF0+3

Loop

I think you need to set the comparator config register (CMCON) to 0x07 (00000111) to disable the comparators.
The power on default is for the register is 0 which enables the comparators and configures A0-A3 analog
inputs.

Mike C

If there is no absolute truth then nothing can be known.
.

Follow-Ups:
- Re: Using 74xx574 D FF to expand PIC outputs
  - From: Peter S. May

References:
- Using 74xx574 D FF to expand PIC outputs
  - From: Peter S. May

Prev by Date: Re: 11kw 240vac 60(ish) hz 1 cyl diesel Generator "problem"
Next by Date: Re: electric meters
Previous by thread: Re: Using 74xx574 D FF to expand PIC outputs
Next by thread: Re: Using 74xx574 D FF to expand PIC outputs
Index(es):
- Date
- Thread