Lpc2000

At 05:57 PM 2/28/04 -0500, you wrote:
>At 03:27 PM 2/28/04 +0000, you wrote:
>
> >Now, the schematic for my MCB2100 board shows pretty much the exact same
> >circuit as listed under RTS_DTR.DOC in the files section. I doubt it's
> >an actual circuit problem, since there's no electrical connection
> >between the DTR/RTS stuff and the RD/TD stuff, so I guess it's probably
> >a problem with the layout of the board or something - but if anyone else
> >has a board that does the DTR/RTS thing, could they possibly try maxing
> >out the RS232 port while watching the actual /RST and P0.14 lines with a
> >scope, to see what they can find?
>
>I should have a couple of boards coming in a few days.  I'll take a look.

I've had a chance to do some preliminary testing.  Other than an extra 
inversion on some pins and some mechanical fit issues I've had no 
problems.  I'm using FETs rather than transistors but I've seen only a 
little noise (~20mV with 60mV spikes at a 1.25MHz period) on the gates 
presumably from the level translators switching supply.

I've still got some testing to do, different speeds etc.., and I want to 
replace the patched in through hole caps with proper smt ones but it looks 
like it will be fine.

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