Lpc2000

----- Original Message ----- 
From: "jk jlkj" <njad2002@...>
To: <lpc2000@yahoogroups.com>
Sent: Monday, March 27, 2006 12:07 PM
Subject: Re: [lpc2000] JTAG problem


>
>
> 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.


The former, I'm not sure if the latter will work.

Leon
--
Leon Heller, G1HSM
leon.heller@...
http://www.geocities.com/leon_heller