Lpc2000

Check the link below for more details on "JTAG Interface Connection":
http://www.segger.com/jlink.html

I haven't experienced any blue screens while using Jlink. However, 
without using the pull-ups/downs the J-link sometimes doesn't 
respond at all. In the worst case, EWARM shuts down by itself, and 
gives me this send report pop-up window. But ever since implementing 
the resistors, JLINK works perfectly. 

So, are u using pull-ups & pull downs for required JTAG port pins on 
your board? J-Link can work without them, but things will be much 
safer if u use them.

Hope this helps,
Leighton


--- In lpc2000@yahoogroups.com, "k b shah \(lascaux\)" <kbshah@l...> 
wrote:
> Guys,
> That was my suspect i.e. my board is bad, but I have tried same 
JLINK with other board from ATMEL -- AT91SAM7 series , result is 
same. I have same trouble. Infect my colleague who has another 
JLINK, has same issue ...also . He spent 3 days worth of time to 
find out this issue.... since every time you cycle power, the 
program can break in the interrupt, otherwise,  can not break in the 
interrupt when there is a breakpoint in interrupt routine.
> I do not think it is the issue with my phytech or Atmel board from 
my colleague.
> More like a issue with  JLINK.
> k b 
>   ----- Original Message ----- 
>   From: Robert Adsett 
>   To: lpc2000@yahoogroups.com 
>   Sent: Monday, March 14, 2005 10:20 PM
>   Subject: Re: [lpc2000] Re: Segger / IAR J-Link JTAG and Blue 
Screen of Death
> 
> 
>   At 06:51 PM 3/14/05 -0500, k b shah \(lascaux\) wrote:
>   >I  have check reset signal going to CPU --- it does not go 
to '0' state 
>   >i.e. it changes its level  from 3V  -- Normally high to 2V and 
then back 
>   >to 3V...
> 
>   That sounds like a hardware fault.  Either with the board or the 
>   J-link.  It's acting as if the reset from the J-link is trying 
to pull it 
>   down but can't sink enough current.  Either the pullup on the 
reset is too 
>   strong or the reset on the J-Link is not able to sink reasonable 
current or 
>   there's a bad ground connection or ....
> 
>   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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