Lpc2000

Hello,

How memory protect is usefull on LPC22xx parts? I see it useless! 
Anyone can change the BOOT pins to make the chip start from external 
FLASH to copy the internal FLASH contents!

Shouldn't memory protect disable BOOT pins?

Thanks,

Gus

Hello,

How memory protect is usefull on LPC22xx!!! Shouldn't memory protect 
disable the BOOT pins? Anyone can boot from external FLASH with 
simple software to read the internal flash!

Gus

Hi Gus,

I think they are disabled.
In the User's Manual which can be found here:
http://www.semiconductors.philips.com/acrobat_download/usermanuals/UM_LPC21XX_LPC22XX_2.pdf
On page 267 the flow chart shows that boot will be aborted if external
boot is selected and security signature is set. 

Cheers, Bob

--- In lpc2000@yahoogroups.com, "Gus" <gus_is_working@y...> wrote:

> 
> Hello,
> 
> How memory protect is usefull on LPC22xx parts? I see it useless! 
> Anyone can change the BOOT pins to make the chip start from external 
> FLASH to copy the internal FLASH contents!
> 
> Shouldn't memory protect disable BOOT pins?
> 
> Thanks,
> 
> Gus