Lpc2000

> It is "by definition" possible to program the device through JTAG.
> However, Paul brought up the most important issue, compatibility 
over
> a longer periode of time. If Philips does not publish the direct
> programming sequence, they might have a good reason for it, one 
being
> that changes can be made to the actual programming mechanism 
without
> changing anything in the Programming Interface. 
> 
> I would HIGHLY recommend to use the internal routines provided by 
the
> bootloader for ease of use as much as for avoiding future trouble 
in
> case the mechanism actually changes. 
> 
> Being an embedded developer as well as involved with customer 
support
> some times, I know that we all want to know HOW things work in 
detail
> but sometimes it is time not well spent to dig into issues that can
> only make live harder. 
> 
> On a side note, I don't try to figure out the exact procedures 
used by
> the BIOS of my PC if I program something in Visual C++  :-)
> 
> Cheers, Bob.


You right. But by chance I can erase the bootloader. I found in our 
russian forum what one embedder erased the bootloader when he 
downloaded a big file ( > 128 kB) to LPC21xx through the flash 
bootloader. I don't know is it possible? But theoretically it is 
possible :(

When I will have free time, I will disassemble the Philips 
bootloader. Maybe I will find a technique of working with flash 
memory  without IAP.

BR, Konstantin.