Lpc2000

I didn't have a 5V voltage in my board, so I used MAX3232, which is the 
3.3V version of MAX232. There is an ST3232 also, which is equivalent. 
You can use that chip if you think that 5V is your problem (this might 
also save you some 5V circuitry).

Guille

--- In lpc2000@yahoogroups.com, Rob Jansen <rob@m...> wrote:
>
> Gus,
> > On my board I have LPC2138 connected to MAX232 running at 5V. I had 
> > problems with UART until I added a 4.7K resistor in series. and the 
> > voltage high on it now is 2.3V
> >
> > Are the pins real 5V tolerant? The data sheet says UART RX is 5V 
> > tolerant!!!
> >   
> I had a MAX232 running at 5V connected to an LPC2106, no series 
resistors.
> No problems at all running at 115200 Baud.
> 
> Regards,
> 
>     Rob
>