Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 17 ASYNCHRONOUS SERIAL INTERFACE C (UARTC)
R01UH0042EJ0500 Rev.5.00 Page 750 of 1513
Aug 12, 2011
• Reception error causes
Error Flag Reception Error Cause
UCnPE Parity error Received parity bit does not match the setting
UCnFE Framing error Stop bit not detected
UCnOVE Overrun error Reception of next data completed before data was read from receive buffer
When reception errors occur, perform the following procedures depending upon the kind of error.
• Parity error
If false data is received due to problems such as noise in the reception line, discard the received data and retransmit.
• Framing error
A baud rate error may have occurred between the reception side and transmission side or the start bit may have
been erroneously detected. Since this is a fatal error for the communication format, check the operation stop in the
transmission side, perform initialization processing each other, and then start the communication again.
• Overrun error
Since the next reception is completed before reading receive data, 1 frame of data is discarded. If this data was
needed, do a retransmission.
Caution If a receive error interrupt occurs during continuous reception, read the contents of the UCnSTR
register must be read before the next reception is completed, then perform error processing.