PC to EUART on pic 16F688

[Archangel]

I'm transmitting 5 bytes of data at a time. Decimal 0,0,1,127,128. The data goes from a UART on a netburner card to the RX pin on a 16F688. About 50% of the time I get a USART Overrun error. In addition, the pic chip sometimes restarts up showing a buffer error.

2 things come to mind about these problems, I have experienced with serial backpack using very much the same code. Send your data Open True not driven true and make sure there is a pullup resistor on the Hserin Rx pin so it is in a logic High state at boot.