[time-nuts] Why these Crystal Frequencies?

Javier Herrero jherrero at hvsistemas.es
Thu Dec 15 02:37:04 EST 2011


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





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