Lpc2000

--- In lpc2100@yahoogroups.com, "Hugh O'Keeffe" <hugh.okeeffe@a...> wrote:
> Ashling have seen problems with the secondary debug port as well.
> Sometimes it works, sometimes it doesn't. We have been able to
> debug/flash via the secondary port, however, not consistently and
> reliably. From a recent batch of twenty of our EVBA7 boards we had five
> secondary debug failures. We are confident we are doing the right thing
> and that it is not a tool issue (we have reproduced the problem with ARM
> MultiICE as well).
>  
> 
> Hugh @ http://www.ashling.com/support/lpc2100/  
>  
>  
>  -----Original Message-----
> From: Jim Beagley [mailto:jim5272@h...] 
> Sent: 21 January 2004 00:59
> To: lpc2100@yahoogroups.com
> Subject: [lpc2100] Re: Secondary JTAG problem. -> succesfull solution
> 
> 
> 
> Using the Primary for program, and then switching to secondary for
> debug works fine. Attempting to program in Secondary mode fails at
> every attempt, and only serves to corrupt the currently flashed
> program, after which the primary port is required to aleviate the
> problem. 

The following points out that that the secondary JTAG is *only*
intended for debugging:

http://www.semiconductors.philips.com/acrobat/applicationnotes/AN10255_1.pdf

Leon