What is theabsolutely minimal hardware to run BLINK with a PIC18F4620?

[LinkMTech]

I would also try changing LED1 variable assignment to:

LED1 VAR LATB.0 ' Assign name "LED1" to LATB.0 on pin 33

[Demon]

Isn't 1K on the LED a bit high?

I usually have 330R.

Robert

[BrianT]

1k with high brightness LEDs is plenty.

I think the problem is a missing register definition somewhere but I can't find it.

Cheers
BrianT

[Archangel]

Hi Brian,
I would guess it's something in the default configs that is/are? at odds with your code, better to hand code the configs so you know what you have.
DEFINE OSC ??

[Ioannis]

Bit 7 of OSCCON, should not be a zero?

Ioannis

[spcw1234]

bit 7 only matters if using sleep

add led1=0 near the beginning of your code

You should also define the osc to 08

[aratti]

Try

OSCCON = %01111000
OSCTUNE = %01000000
DEFINE OSC 32

I use "INTIO2" but your setting should make no difference if you don't use osc pins as digital in/out.

Cheers

Al.

[BrianT]

Thanks for the tip. I tried LATB.0 and it makes no difference.