Re: [openwince-list] The meaning of the JTAG TRST pin?

[Marcel T. <ma...@te...>]

On Wed, Jul 20, 2005 at 03:31:01PM -0700, Jeff Carr wrote:
> The thing I never realized is that JTAG ports also have a TRST pin; but

TRST pin is optional. The chip should work without it, but if it is present,
then some things are simpler.

> I don't even have this pin on my cable! I guess the Xilinx parts are
> smart, they don't need you to assert this point for the part to be
> programmed.
> 
> But, my powerpc board does have a TRST pin on it's jtag port. I tried to
> hook up my DLC5 cable and hoped I could identify the powerpc chip. I
> would have been happy to see that work! Alas, it didn't. I wonder what
> the TRST pin does then?

Please use google to search info about TRST signal on JTAG port.

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