declaration of fraction of crystal frequenciy

[Yves]

Hello all,

Is it possible to declare a xtal value which is not an integer value. for example "Declare Xtal = 32.768"

Regards,

Yves

[trastikata]

Hi Yves,

As far as I know, you can't. You have to declare something else and recalculate your delays and/or timings accordingly. 

Oscillator Frequency Declare.
12-bit core device XTAL values:
Declare Xtal = 4, 8, 10, 12, 16, or 20.
Standard 14-bit core device XTAL values:
Declare Xtal = 3, 4, 7, 8, 10, 12, 14, 16, 19, 20, 22, or 24.
Enhanced 14-bit core device XTAL values:
Declare Xtal = 3, 4, 7, 8, 10, 12, 14, 16, 19, 20, 22, 24, 32, 48, or 64.
18F device XTAL values:
Declare Xtal = 3, 4, 7, 8, 10, 12, 14, 16, 19, 20, 22, 24, 25, 29, 32, 33, 40, 48, 64, 80, or 88.

The Xtal frequencies 3, 7, 14, 19 and 22 are for 3.58MHz, 7.2M Hz, 14.32MHz, 19.66MHz,
22.1184MHz and 29.2MHz respectively.

[Yves]

Tank you for your information. So does it means any other values mentioned above will not gives the proper timing. I was thinking about baud rates timing?

Yves

[trastikata]

So does it means any other values mentioned above will not gives the proper timing. I was thinking about baud rates timing?

Indeed they won't - they will affect any time related commands, like DelayMS. As for the baud rate - you can manually calculate and set-up the corresponding registers/values before start using the serial transfer commands.