18F2620 OSC Confusion

[mister_e]

wich crystal speed you have???

let's say 20MHZ.... So set config fuse to HS OSC at programming time and add
DEFINE OSC 20
at the top of your code

XT is for 4MHZ crystal only.

If you select INTROSC, on F2620 the default setting is...1 MHZ wich explain the 1/4 time speed you have. Default PBP xtal speed is 4MHZ.
to set internal Oscillator speed, write directly to OSCCON register.
OSCCON=%01100000 '=> set internal osc to 4MHZ
the above will fix your problem.

Be friend with this

Welcome to the forum and have fun!!!

[mister_e]

ooh i forget, you can't configure the internal USART to talk directly to the PC... you need MAX232 or else inverter. BUT you can use software command like SEROUT, SEROUT2 and use the inverted mode. Just use a resistor in serie will work.

[atillotson]

Thanks, Worked Like a Dream!
Ash