Lpc2000

Hello,

a while ago Tsvetan from Olimex posted a message that he had problems
if the 3.3V supply came up earlier than the 1.8V, another post was
excatly the opposite that 3.3V first worked but 1.8V first did not.
Our problem is that the hardware we are using either one works. If
3.3V is up first it works, if 1.8V is first same thing. 

We would like to look into a hardware that shows such a power on
sequence problem to make sure we fix it if it needs fixing.

Your inputs on this forum as well as e-mail to
micro.support@... would be greatly appreciated.

Regards, Robert

At 06:12 PM 3/15/04 +0000, you wrote:
>Hello,
>
>a while ago Tsvetan from Olimex posted a message that he had problems
>if the 3.3V supply came up earlier than the 1.8V, another post was
>excatly the opposite that 3.3V first worked but 1.8V first did not.
>Our problem is that the hardware we are using either one works. If
>3.3V is up first it works, if 1.8V is first same thing.
>
>We would like to look into a hardware that shows such a power on
>sequence problem to make sure we fix it if it needs fixing.

Have you had any insight into this since this post?  One reason I'm asking 
is that I may have finally (and accidentally) reproduced it.  I had two 
boards that I was testing that showed the problem.  One wouldn't program at 
all and the other was starting only intermittently.  In both cases the flux 
around the JTAG connector was not properly cleaned.  After cleaning up the 
problem disappeared.

Robert

" 'Freedom' has no meaning of itself.  There are always restrictions,
be they legal, genetic, or physical.  If you don't believe me, try to
chew a radio signal. "

                         Kelvin Throop, III