Hello,

I'm having trouble getting the USART mode of the SCC on the 16C65A/JW to
function properly in receive mode. I have the 16C65A hooked up to 5VDC power
and I am using a 9.8304MHz Crystal with two 15pF caps attached in the normal
manner. I am also using the MAX233 serial level converter to interface with
an RS232 on my PC. I wrote example code on the 16C65A which sent a capital
letter A continuously at 38400 baud. It worked fine. I then tried to make a
loop-back program which would receive a character and then immediately send
back the same character. If the character I try has a LSB of 0, it always
works. If it has an LSB of 1, it only works about 80% of the time, otherwise
I get an incorrect character which appears to be the same every time for
that particular input character. If I do a harware loopback ( connect the
wire coming from the MAX233 to the rxd pin on the PIC to the wire going from
the txd pin on the PIC to the MAX233), all chars work fine, so it isnt my
serial port, serial code on the PC, or serial level converter that is the
problem. I have attached my example code for the loopback.
        This problem occurs even if I send one char per sec ( still at 38400
baud, I mean I just hit a key per second ).

PLEASE HELP! Thanks, Sean

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