Datasheet

V850ES/JG3 CHAPTER 15 ASYNCHRONOUS SERIAL INTERFACE A (UARTA)
R01UH0015EJ0300 Rev.3.00 Page 471 of 870
Sep 30, 2010
15.6.8 Reception errors
Errors during a receive operation are of three types: parity errors, framing errors, and overrun errors. Data reception
result error flags are set in the UAnSTR register and a reception complete interrupt request signal (INTUAnR) is output
when an error occurs.
It is possible to ascertain which error occurred during reception by reading the contents of the UAnSTR register.
Clear the reception error flag by writing 0 to it after reading it.
• Receive data read flow
START
No
INTUAnR signal
generated?
Error occurs?
END
Yes
No
Yes
Error processing
Read UAnRX register
Read UAnSTR register
Caution When an INTUAnR signal is generated, the UAnSTR register must be read to check for errors.
• Reception error causes
Error Flag Reception Error Cause
UAnPE Parity error Received parity bit does not match the setting
UAnFE Framing error Stop bit not detected
UAnOVE Overrun error Reception of next data completed before data was read from receive buffer