PIC18F452 vs PIC18F4520

barkerben · Joined: 19 Jan 2006 Posts: 22

Hi,

I have the student version of CCS for the PIC18F452. I've just realised my new PIC is a PIC18F4520.

Although my compiler was sold as locked to the former, are they similar enough that I can still program it, or do I need a new PIC :-(

Cheers,

Ben

Guest · Posted: Mon May 29, 2006 6:35 am

...it looks like the pinouts are the same for both IC's, so channging may not be too hard...

Ben

ckielstra · Joined: 18 Mar 2004 Posts: 3680 Location: The Netherlands

Be aware that the PIC18F4520 has a huge list of known hardware errata, especially when you want to do something with the SPI or CCP units these chips are troublesome. Have a look at the errata list.

I haven't checked the register files for both processors but my guess is that for simple programs you very likely will get away with compiling for the PIC18F452. For programs more complicated than blinking a led I recommend you buy the correct compiler/processor combination.

Tip: Have you tried asking for a sample?

Storic · Joined: 03 Dec 2005 Posts: 182 Location: Australia SA

I was not aware of the troublesome list, however I did go from a 4520 to a 4620 without any problems, (I needed to ROM space on my project).

ANdrew
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ckielstra · Joined: 18 Mar 2004 Posts: 3680 Location: The Netherlands