> 155.2 kbs

I assume you mean 115.2, not 155.2!

> w/o external components

The PIC is TTL level. In addition, the built in UART's output is inverted.
This means you need some kind of converter/external components if you intend
to use the internal UART to talk to a PC or anything like that.

You can go with a direct TTL connection to another device that has inverted
TTL signals, like another PIC.

> half duplex receive and transmit

This helps performance wise.

> this clear things up?

Clear as mud.

Bob Ammerman
RAm Systems
(contract development of high performance, high function, low-level
software)

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