Lpc2000

At 02:48 AM 12/19/05 +0000, jayasooriah wrote:
>--- In lpc2000@yahoogroups.com, Robert Adsett <subscriptions@a...> wrote:
> >
> > At 10:42 PM 12/18/05 +0000, jayasooriah wrote:
> > That's somewhat intriguing.  It's the first I've heard of any hint
>at all
> > that the parts can be programmed via a parallel programming algorithm
> > rather than only via JTAG and serial port.  In fact given what has been
> > revealed of the internals I would have said it was unlikely to be
> > possible.  Have you any Philips references?  I can find no mention
>on their
> > web site, indeed the closest I could find was a table that indicated
>that
> > parallel programming was not an option for any of the LPC family.
> >
> > Robert
>
>The Product Overview Edition 08/2005 says otherwise.  It is claimed to
>have been prepared by Philips Microcontroller Customer Technical
>Support Group.

I was hoping for something a little more substantive than the third party 
link to the site you already posted.

>Though I cannot find any parallel programming information for LPC2105
>in data sheet or user manual, Philips has confirmed to me (in email)
>that these parts can be parallel programmed.


Philips, you need to clarify this.  Can these parts be parallel programmed 
or not?  Is the literature on your site wrong or is the letter that was 
sent to Jaya wrong.  They cannot both be right.

>This prompted me to searched for parallel programming information for
>LPC series and found the product overview chart.
>
>I am not sure about others, but from what I learnt in the last couple
>of weeks in relation to: a) on-chip flash programming algorithm; b)
>parallel programming info; c) errata sheets for LPC2105; and d) source
>for the supplied boot loader code, it is now pretty clear to me why
>Philips has chosen to provide boot loader code so that they do not
>*have* to release the kind of information I discovered.

Well, don't just leave us hanging ;)

>However, the issue relating to code security is a pressing one and I
>cannot continue working on prototype designes for clients unless I
>know for sure that the embedded code is secure from preying eyes.

Well it certainly won't be in a 2105.

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/