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PIC32MX Reference Clock

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strahd_von_zarovich

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Hi , i have PIC32MX460F512L , with my demo board everything works fine with the code below . Demo board has 8 MHz oscillator. But now i have to use 25 MHz crystall as a reference clock. There are lots of information in the clock section's datasheet, but i haven't read all of them yet . Can you give me the specifications for system clock = 80 MHz , peripheral=10 MHz using 25MHz crystall.

Code: 
#pragma config FNOSC = PRIPLL
#pragma config POSCMOD = EC


//#pragma config FPLLIDIV = DIV_2               
//#pragma config FPLLMUL = MUL_20               

//#pragma config FPLLODIV = DIV_1               
//#pragma config FPBDIV = DIV_8                 


#pragma config FWDTEN = OFF
#pragma config CP = OFF
#pragma config BWP = OFF
#pragma config PWP = OFF
 

You mean using a 25 MHz crystal for the primary oscillator? That's feasible when setting FPLLIDIV (/5) and PLLMULT (*16) respectively, but only if you don't need the USB module which requires an integer multiply of 4 MHz as clock input.
 

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