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Re: [lpc2000] Question: Secondary JTAG internals

2005-02-03 by Rod Moffitt

> Philips has stated, and my experience has been, that there is not a 
> sequencing issue on power up.  I suspect you've got something else going 
> on.  I've not used the secondary JTAG myself, but it does appear to 
> cause people no end of troubles.

I have been using the secondary JTAG on several different LPC2106 designs 
(with different revs of both the chip and boot-loader) since the summer of 
2004 and have not had a single problem.

On a side note. All of the designs had 1.8V regulators that fed off of the 
3.3V mains and only let the LPC2106 out of reset after the 1.8V was in 
spec and then only after a delay in the order of hundreds of milliseconds.

- Rod

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