[time-nuts] Pictic II mods

Chuck Harris cfharris at erols.com
Sat Jul 3 01:02:19 UTC 2010


The PIC's internal silicon clock is better than 1% over the entire industrial
voltage and temperature range.  They are accurate enough.

-Chuck Harris

Bob Camp wrote:
> Hi
>
> I believe he's using the internal clock on the PIC. It's not super accurate,
> so running a lot of data can be an issue.
>
> Bob
>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of Stanley Reynolds
> Sent: Friday, July 02, 2010 3:41 PM
> To: time-nuts at febo.com
> Subject: [time-nuts] Pictic II mods
>
> Looking at Richard's code in PICTICII.ASM :
>
>     bsf     TXSTA,BRGH            ;set USART hi speed mode
>     movlw D'51'                         ;set async rate at 9600 baud (51. for
> 8
> MHz int, BRGH=1)
>     movwf SPBRG
>
> Then '25' would be 19,200 baud
> and '12' would be 38,400 baud
>
> Need to test this but could be a way to get more data out.
>
> Stanley




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