Lpc2000

Leon Heller <leon.heller@...> wrote:    ----- Original Message ----- 
From: "jk jlkj" <njad2002@...>
To: <lpc2000@yahoogroups.com>
Sent: Monday, March 27, 2006 7:20 AM
Subject: Re: [lpc2000] JTAG problem


> Is there any method to identify whether the JTAG inputs of LPC have been 
> damaged.

Please don't 'top-post'!

You could write a little program that configures them as inputs, and outputs 
them to another few bits. Load the program using the RS-232 boot facility 
and test the inputs by tying them high and low at the JTAG connector, whilst 
monitoring the outputs. That should work. I didn't bother and just removed 
the chip with some ChipQuik and replaced it - it took me about 30 minutes.
   
  Thanks Leon. What should i do exactly? I am using LPC2214, and here the GPIO and JTAG share the same pins. I would like to know whether it would be sufficient to test the GPIO functionality to ascertain whether JTAG is working.
   
  OR
   
  Should i configure the pins to be used as JTAG and then program the pins hign and low.
   
  Regards,
  Jerome
   
   
   
   
   
   
  


				
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