Lpc2000

Hi,

IIRC, you need to drive TCK at less than 1/6th the system clock speed
for the -S variants, so try ~1MHz for the JTAG clock speed. 

Try http://www.arm.com/support/ARM7TDMI-S.html.

Might help, who knows?

--
Paul Curtis, Rowley Associates Ltd  http://www.rowley.co.uk
CrossWorks for MSP430, ARM, and (soon) Atmel AVR processors  

> -----Original Message-----
> From: theeuwke [mailto:theeuwke@...] 
> Sent: 03 November 2004 16:01
> To: lpc2000@yahoogroups.com
> Subject: [lpc2000] Re: Ashling EVBA 2194 and Multi-ICE
> 
> 
> 
> Ok, I parral soldert a resistor of 1k on it, so it's a little 
> bit less than 1k now, but still no luck, i am suspecting my 
> settings of the majic:
> - ARM7TDMI (LPC2106)
> - Little Endian
> - Starup Connection mode: Intrusive (reset and stop processor)
> - Sense target on VREF
> - JTAG Clock speed = 10 (CPU runs at 14,476mhz)
> - Target Reset causes JTAG RESET = "unchecked"
> - Reset Target using Reset output signal = unchecked
> - Drive TRST* Signal = unchecked
> 
> --- In lpc2000@yahoogroups.com, "Hugh O'Keeffe" <hugh.okeeffe@a...>
> wrote:
> > 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@c...]
> > 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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