L030010 wrote :

> current i am using a 10MHZ crystal with 4X step up, when i 
> implement spi what is the Fosc? is it 10Mhz or 40Mhz? pls advise

10 Mhz with the PLL disabled.
40 Mhz with the PLL enabled.

(If you with "4x step up" ment the PLL, it might be better
to simply call it "PLL"...)

Jan-Erik.



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