8-bit MicrocontrollersのトピックRe: How to Add the protection to internal Flash ??

How to Add the protection to internal Flash ??

Harlen_CHen — Fri, 03 Jul 2009 08:31:41 GMT

Hello,

We use the MC908GT16 for 3 years. Currently, we find the internal flash to be changed. The program can not run correctly. Originally, we dont add the protection to the internal Flash. We want to know:

1. How to add protection to the entire Flash?

2. If protection , We can read the program of Flash? How to read?

3. If protection, the Flash can be re-program ?

Best regards

harlen

Re: How to Add the protection to internal Flash ??

OmarAI — Fri, 03 Jul 2009 09:36:42 GMT

I've read your post but can't understand it completely....can you be more specific?

Re: How to Add the protection to internal Flash ??

peg — Fri, 03 Jul 2009 10:20:35 GMT

Hello Harlen,

What you want can be achieved by using Flash block protection.

See section 4.4.6 of the manual. Maybe look at the GT16A manual for a better description.

You just programme NVPROT with the appropriate value and that's it. ($BE)

This only provides protection from internal access.

When you connect via a BDM adapter the software will un-protect the flash so it may be then modified.

Note that this un-protecting can only be done through the BDM.

If still not clear on this perhaps you can narrow down your area of concern.