Lpc2000

I want to confirm that there is a potential problem with our EVBA7 board
that may prevent operation with the ARM Multi-ICE.
 
The problem is due to the rise-time of RST line which enables the
EmbeddedICE on the LPC2000 device. Due to the use of an incorrect resistor
value on our EVBA7 board the EmbeddedICE interface may not be enabled when
working with Multi-ICE (Ashling tools have an internal pull-up, hence, do
not have this problem).
 
The fix is to replace R39 on the EVBA7 board (10K) with a 1K resistor.
 



Hugh @  <http://www.ashling.com/support/lpc2000/>
http://www.ashling.com/support/lpc2000/ 

 
 

-----Original Message-----
From: David [mailto:daver@...] 
Sent: 12 August 2004 21:27
To: lpc2000@yahoogroups.com
Subject: [lpc2000] Re: Ashling EVBA 2194 and Multi-ICE


--- In lpc2000@yahoogroups.com, Pauric Doherty <pauric_doherty@y...>
wrote:
> All,
> 
> Has anybody got the ARM Multi-ICE unit and ARM Multi-ICE Server version
> 2.2.5 to connect to an Ashling EVBA7 evaluation board with an
adaptor board
> FA-EVBA7-64 and LPC2194 chip.
> 
> I've posted this message before and have found out that it is possible
> (thanks Milos) but I would like to know if anyone has actually got
the above
> situation to work. I've read all the documentation regarding jumper
settings
> and Multi-ICE debugging but have still to figure out what I'm doing
wrong.
> 
> Thanks in advance for any help
> It really is appreciated
> 
> Regards,
> Pauric

We have the same evaluation board with the 2294 processor.

We attempted to use the Wiggler to debug the board but
to no avail. After many waveforms and looking at the
schematics, we determined that the RST line was rising
more slowly than TRST. This meant that the TRST line was
trying to reset the JTAG state machine when the processor
was still in reset.

Our solution was to put a 1K resister in parallel to RST.
The resister on the board R39 (10K) could also be replaced
but we didn't want to solder the board.

The people at Macraigor were VERY helpful in helping us
narrow down the problem. Thanks to Macraigor!

Regards,
Dave





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