[How to] Pic24EP256 output Crystal or FPLLO freq. on a pin

[pieter]

[Fonky]

/ With the fuses above:
// Crystal = 8 mHz
// Pll multiplies clock to 128 mHz
// Output the CRYSTAL frequency or the FPLLO clock on Pin C8:
//
// REFOCON=0x3700; // CRYSTAL frequency to output as ref frequency registers div128
// REFOCON=0xB700; // measure freq on pin C8 with scope and multiply with 128 to get the crystal freq.
// or
REFOCON=0x2C00; // FPLLO clock div4096
REFOCON=0xAC00; // measure freq on pin C8 with scope and multiply with 4096 to get the FPLLO freq.
RP56=0x31; // set reference clock output on pin C8
//
while (TRUE) // main routine
{
RESTART_WDT(); // reset watchdog
delay_ms(500);
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Kick