Lpc2000

Charles,

Reset threshold for that device is 2.93V for 3.3V(as standard for TI
supervisors)which is too low for ARM processors (3.0V min). I am not
sure about 1.8V threshold- did you try this with LPC211x?

Regards,
Miodrag

--- In lpc2000@yahoogroups.com, "charlesgrenz" <charles.grenz@s...> wrote:
> 
> Miodrag,
> 
> Try a Texas Instruments TPS3306-20-Q1. It resets with a 100ms pulse.
> There are also other versions that have a reset of different values.
> 
> regards,
> Charles
> 
> 
> --- In lpc2000@yahoogroups.com, "maestral64" <maestral64@y...> wrote:
> > 
> > --- In lpc2000@yahoogroups.com, Shannon Holland <holland@l...> wrote:
> > > The Microchip MCP120T is really easy to use. digikey has them in
> stock, 
> > > they have an open drain reset output so they are really easy to 
> > > interface to existing circuits (just don't for get the pullup!).
> > > 
> > > Shannon
> > > 
> > > On Jun 6, 2004, at 12:51 PM, itsjustimpossible wrote:
> > > 
> > > > Hi
> > > > We have just received the IAR LPC2106 eval board, and are having
> > > > trouble with power-up resets. I am using the NOHAU PSU that came
> > > > with our other eval board which doesn't have a particularly fast
> > > > rise-time.
> > > >
> > > > I need to lay a board out, but can anyone recommend a decent reset
> > > > device that they have used. MAXIM do some good ones but their lead
> > > > time can be very long.
> > > >
> > > > cheers
> > > > Simon
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > Yahoo! Groups Links
> > > >
> > > >
> > > >
> > > >
> > > >Yes, Microchip has few more devices like MCP809/810 and you caln
> > also find ON SEMI MAX809TTR.
> > My problem is that I would like to use 'faster' reset, with reset
> > delay time up to 100ms. By datasheet 2114 needs min 10 ms. For
> > Microchip circuit time delay is 140 ms min, up to 0.5 sec(!) max.
> > Any idea/recomendation? Again, I am little bit sceptical to use rC
> > circuit reset in professional stand-alone application.
> > 
> > Regards,
> > Miodrag