I already said a quiet doah! to myself after sending this.
Having spent more than a little while simulating it I of all people
should remember a 628 has a PWM module... and yes it is simply
a brilliant gem of a micro.

James
caska@virtualbreadboard.com

-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Byron A Jeff
Sent: Tuesday, June 25, 2002 12:17 AM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [PIC]: Serial timing dilemma


On Mon, Jun 24, 2002 at 10:47:12AM +1000, James Caska wrote:
> I suppose if you have already moved to the 628 its probably not practical,
> but I imagine you could quite likely use the 877 PWM with a low frequency
> setting to generate a nice consistant pulsestream and then update the
> frequency each time you receive a new serial packet. You might need to
keep
> track of how many output pulses the PWM has actually made to synchronise
> with your serial input data but then the serial stream would be less time
> critical.

It's imminently practical. The 628 has the same 10 bit PWM module as the
877.

Another reason why it's the cream of the crop when it comes to 18/20 pin
PICs.

BAJ

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