Yahoo Groups archive

Lpc2000

Index last updated: 2026-04-28 23:31 UTC

Message

Re: LPC22xx Flash Copy Protection

2005-06-01 by tom_laffey

Hi,

My guess is that you are looking for a CPU for a secure (financial?) 
application.  I worked on a platform a few years ago that stored off-
chip programs and data in an encrypted form and then decrypted pages 
into internal RAM as needed.  Quite a bit of "infrastructure" is 
required to do this sort of thing.  And you might want an ARM9 instead 
of an ARM7.  

To do this now, I'd be looking for an implemenation using 
ARM's "TrustZone" and "SecureCore" technology.  I haven't yet seen this 
in generally available silicon.

Regards,

Tom

--- In lpc2000@yahoogroups.com, "mirax_ua" <mirax_ua@y...> wrote:
> Hello ppl,
> Those processors don't have any flash copy protection, do they? As 
> long as there is some executable code in external memory and that is 
> what external flash is meant for. You can hook up some of you code 
> into external flash that will read the contents of internal flash and 
> give it away via say serial interface. What protection are we talking 
> about here?
> Acctually, I couldn't find any 32-bit processor that has both 
external 
> memory bus and internal flash with read protection.

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.