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Re: [lpc2000] Flashless LPC2210, flash download?

2006-03-30 by Robert Adsett

At 10:07 AM 3/30/06 +0200, Dominic Rath wrote:
>you can't use the ISP protocol to program an external flash. On the 2210/20
>it's only possible to transfer code to target RAM. Philips can't know how
>your external memory wants to be programmed.

Well, you could use the serial ISP to bootstrap the programming routines 
into RAM.  That's how some serial ISPs work even for internal flash.  The 
ST10 as an example loads something like 16 bytes from the serial port to a 
fixed memory location and then jumps to it.  The serial ISP process is a 
set of step loading larger programs into RAM until you have one that can 
handle the flash programming.  It's a lot more straightforward than I just 
made it sound.

Robert

" 'Freedom' has no meaning of itself.  There are always restrictions,   be 
they legal, genetic, or physical.  If you don't believe me, try to chew a 
radio signal. "  -- Kelvin Throop, III
http://www.aeolusdevelopment.com/

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