Lpc2000

On Friday 23 December 2005 15:43, Felix wrote:
> 3) How ever -- Philips did not comment on my previous statement ---
> IS THERE a way to reprogram BOOT on CPR enabled devices w/o erasing
> all sectors? (by using boot update procedure with patched boot)
>   If there is such possibility -- then i consider this CRP unsecure,
> and  not effective enough.
> Dixi.
>
Bootloader update works by using ISP to load the supplied .hex file into RAM 
and executing it there. Because 'Write to RAM' is disabled when CRP is 
enabled, the bootloader can't be updated until the flash has been erased. 
When CRP is enabled, only all user sectors can be erased, so it isn't 
possible to erase sector 0 while preserving the content of the other sectors.
The LPCs are save in that regard.

Dominic