upd70f3402 Renesas Electronics Corporation., upd70f3402 Datasheet - Page 422

• Manufacturer Part Number: upd70f3402
• Description: 32-/16-bit Single-chip Microcontroller With Can Interface
• Manufacturer: Renesas Electronics Corporation.

When a reception errors occur, perform the following procedures depending upon the type of error:
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Caution:
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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.
If a receive error interrupt occurs during continuous reception, read the contents of
the UAnSTR register must be read before the next reception is completed, then per-
form error processing.
Chapter 12 Asynchronous Serial Interface A (UARTA)
User’s Manual U16702EE3V2UD00