As with any feature on any device there can always be thigs that catch
you out. The interrupt on change feature works exactly like the
datasheet says it does.

Naturally, if you change the level of one of these pins (as an output),
the micro senses it and triggers and interrupt.....also read modify
write instructions can cause this effect.

There are similat gotchas in the use of anolog pins and TIMER1 for
example, it really is just a case of looking at what the application is
doing, and really trying to empathise with the micro to work out why
something is going wrong.

Btw. You have the REPLY TO address set in your email client to you. If
you clear this entry, it will still work for you, but this reply would
automatically go to the piclist, without me having to manually change
this. Olin really hates it when people do this ;-)

Regards, Kevin

> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@mitvma.mit.edu] On Behalf Of Nigel Duckworth
> Sent: 22 March 2002 17:01
> To: PICLIST@mitvma.mit.edu
> Subject: [PIC]: Is it ok to use 'portb interrupt on change'?
>
>
> I use 'portb interrupt on change' to wake a 16C621A from
> sleep in a four button hand-held remote control application
> running on two AAA cells, no problems so far.
>
> On Friday, March 22, 2002 4:34 PM, Carlos Ojea
> [SMTP:carlosojea@LEVELTELECOM.ES] wrote:
> > Hello :
> >
> > I know some people on this list are dissapointed with
> 'portb interrupt
> > on change' (RB4-RB7 in 18C452). I was thinking in (perhaps)
> use this
> > feature so I want to hear their thoughts.
> > Why I should avoid 'interrupt on change'?
> > Are there any problems?.
> > Maybe missing interrupts?
> >
> > Thank you all,
> > Carlos.
> >
> > --
> > http://www.piclist.com hint: To leave the PICList
> > mailto:piclist-unsubscribe-request@mitvma.mit.edu
>
> --
> http://www.piclist.com hint: To leave the PICList
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