"John A. Craft" wrote:
>
> I got one of the aforementioned BGMicro Trimble GPS receivers.  The
> documentation indicates the serial ports being "TTL Level", Using one of
> the MAX chips it talks to the computer just fine.
>
> If I want to talk to the USART port of a 16C63, what's needed?  Can I hook
> directly?  Seems strange to hook a MAX to the pic and a MAX to the GPS.....

I've done this with a pair of simple transistor invertors
for year without any problems. Use the RTS line for the
supply for the two transistors, and a zener to limit the
voltage going to the PIC.

This suggestion of mine always triggers a load of smart
asses who want to complicate matters with loads of
electronics.

Take it away, guys... ;)

--
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