PIC18F4550 to 18F4553 Comm Issue?

[Demon]

I wouldn't be surprised if either the bootloader or the Pickit 3 was overriding your config fuses.

But I've never used either.

Robert

[tumbleweed]

The thing that isn't the same is the 4550 is programmed with a boot loader

You probably should have mentioned that in post #1.

Most bootloaders won't allow you to reprogram the CONFIG section (since that will likely break the bootloader), while the PICkit3 will load whatever you've set in the hex file.

[ShaneMichael]

I defiantly would have mentioned Pickit vs bootloader if I thought that would have anything to do it. I thought they would program what ever I had configured. Sounds like that may not be how the boot loader works though? Good to know.

Thanks

[tumbleweed]

It depends on the bootloader you're using... some will, some won't, so it's worth checking.

It's usually a good idea NOT to allow the config to be reprogrammed. For example, if you goof up/change the osc setting you can easily turn your board into a brick.