Lpc2000

I know the I/O pins are 5V tolerant, does that also mean that the
other devices connected to them are also 5V tolerant?  I want to use a
5V RS232 transceiver instead of a 3.3V one.  The 5V transceivers are
much cheaper than the 3.3V ones.

Thanks,

Vern

Em Ter 21 Fev 2006 15:13, deliconn escreveu:
> I know the I/O pins are 5V tolerant, does that also mean that the
> other devices connected to them are also 5V tolerant?  I want to use a
> 5V RS232 transceiver instead of a 3.3V one.  The 5V transceivers are
> much cheaper than the 3.3V ones.
>
> Thanks,
>
> Vern
>
I am using here a MAX232 attached to a LPC2106. The MAX232 runs at 5V and I 
founded no problems, the 3.3V from the LPC TX is enough to run the MAX232 and 
the 5V RX from MAX232 causes no problem in the LPC. I tryed some speeds, but 
now I am working at 115200. I did ISP too, without problems.
I tryed also 75176 to run RS485 at 5V, and worked fine too.