[time-nuts] Why these Crystal Frequencies?

Steve . iteration69 at gmail.com
Thu Dec 15 02:42:23 EST 2011


adding to the sub ordinate: 32.768khz is a common resonator / crystal
frequency for Real Time Clocks.  Note this is not time-nut RTC

My general rule of thumb is that anything that will cleanly divide by 2 (a
binary number) can be use for time applications with little or no work in
either hardware or software.

Steve

On Thu, Dec 15, 2011 at 2:37 AM, Javier Herrero <jherrero at hvsistemas.es>wrote:

> A lot of them are derivatives of the 2.4576 UART baud rate gen:
>
>  9.8304 = 2.4576 * 4
>>
> 14.7456 = 2.4576 * 6
>
>  19.6608 = 2.4576 * 8
>>
>> 22.1184 = 2.4576 * 9
>>
>
>  24.567 = 2.4576 * 10
>>
>>  That is the reason why I've used some of them (14.7456MHz and
> 19.6608MHz) for clocking the HC11 variants with 4 and 5MHz internal clock
> (long ago... :) ).
>
> Regards,
>
> Javier
>
>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>



More information about the time-nuts mailing list