RX610 Group
20. Serial Communications Interface (SCI)
R01UH0032EJ0120 Rev.1.20
Page 628 of 1006
Feb 20, 2013
PER Flag (Parity Error Flag)
Indicates that a parity error has occurred during reception in asynchronous mode and the reception ends abnormally.
[Setting condition]
•
When a parity error is detected during reception
Although receive data when the parity error occurs is transferred to RDR, no RXI interrupt request occurs. Note that
when the PER flag is being set to 1, the subsequent serial reception cannot be performed. In clock synchronous
mode, serial transmission also cannot continue.
[Clearing condition]
•
When a 0 is written to PER after reading PER = 1 (After writing a 0 to it, read the PER bit and check that it has
actually been cleared to 0.)
Even when the RE bit in SCR is cleared to 0 (which indicates that serial reception is disabled), the PER flag is not
affected and retains its previous value.
ERS Flag (Error Signal Status Flag)
[Setting condition]
•
When a low error signal is sampled
[Clearing condition]
•
When a 0 is written to ERS after reading ERS = 1
ORER Flag (Overrun Error Flag)
Indicates that an overrun error has occurred during reception and the reception ends abnormally.
[Setting condition]
•
When the next data is received before receive data is read from RDR
In RDR, the receive data prior to an overrun error occurrence is retained, but data received following the overrun
error occurrence is lost. When the ORER flag is set to 1, subsequent serial reception cannot be performed.
[Clearing condition]
•
When a 0 is written to ORER after reading ORER = 1 (After writing a 0 to it, read the ORER bit and check that it
has actually been cleared to 0.)
Even when the RE bit in SCR is cleared to 0, the ORER flag is not affected and retains its previous value.
RDRF Bit (Receive Data Full Flag)
Indicates whether RDR has received data.
[Setting condition]
•
When data has been received normally, and transferred from RSR to RDR
[Clearing condition]
•
When data is transferred from RDR.
Summary of Contents for RX600 Series
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