Thanks Tony for your reply, you are quite write about PORTC being the serial
port and the requirment of level shifting use a MAX chip. But what I was
after was information on burning a pic16c7x. The .HEX file required to burn
can be transfered via port B6 and B7. It's quite easy to do on the 16c84 but
I cant get it to work on the 74.

Any Ideas?
Phil
Cork
Ireland
----- Original Message -----
From: K|bek Tony <tony.kubek@FLINTAB.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Sunday, April 02, 2000 12:52 PM
Subject: Re: Implementing RS-232 serial with 16F876 UART


Hi,
Just a thought, ( don't know how much You know about comms. )

>Also, everything I have read only seems to mention using the Tx and Rx
>pins on Port C. Are connecting these pins to the opposite pins on a
serial
>port all that is needed? Is there no need for any RTS/CTS connections
etc?
>Thanks for your time and any help you can give. Below are the details
of
>my configuration. Please be patient as I have limited experience.

This sounds like You are trying to connect the RS232 pins from the
computer
directly to the PIC, is this the case ? then no go, You must use an
level shifter of some sorts to accomplish the 'correct' ( not that
sensitive )
voltage levels. For exemple any MAX232... I can supply you with some
options
if this is the case.
Secondly to answer Your question, you need to connect:

Pic:Rx -> Pc:Tx ( level shifter ! )
Pic:Tx -> Pc:Rx ( level shifter ! )
Pic:Gnd -> Pc:Gnd ( straight connection )

Assuming that no handshaking is used.

/Tony


Tony K|bek, Flintab AB
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E-mail: tony.kubek@flintab.com
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