Lpc2000

Ake Hedman, eurosource wrote:

>Tom Walsh wrote:
>
>  
>
>>Cable lengths are a problem with JTAG wigglers (JTAG in general, even
>>high end units could have that problem).  When using a wiggler on an
>>SA1100 project (also ARM), that anything more than 10inches (25cm) could
>>cause problems.
>>
>>Try a different computer, it may not be the cable length but a slow bit
>>on the parallel port?
>>
>>TomW
>>    
>>
>
>Thanks Tom appreciate that. My lab bench could really live without a 
>computer also on it ;-)  so I hope it will be possible to have a meter 
>of cable at least. Will try some configurations.
>
>  
>
IIRC, sometimes you have to put some caps to ground to keep signal ring 
/ overshoot down with longer cables (simple noise filter).  Other times, 
the caps get in the way and the cable works without them.

This was the primary reason I purchased an Abatron BDI2000..


TomW

>Cheers
>/Ake
>
>  
>


-- 
Tom Walsh - WN3L - Embedded Systems Consultant
http://openhardware.net, http://cyberiansoftware.com
"Windows? No thanks, I have work to do..."
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