It the an easy way to calculte the PR2 value? I don't understand how this " PR2 = 0x3837; // 0x3839 is the Hexadecimal value of the PR2 = 14393 which we calculated for 1second." was calculated. Also...

It the an easy way to calculte the PR2 value? I don't understand how this "PR2 = 0x3837; // 0x3839 is the Hexadecimal value of the PR2 = 14393 which we calculated for 1second."was calculated. Also FCY, FOSC and FRC its that a set value or its whatever we want to set to. I am using a PIC24HJ32GP202 and C for programing.