Section 12 Serial Communication Interface (SCI)
Rev. 3.00 Mar. 14, 2006 Page 394 of 804
REJ09B0104-0300
Bit Bit
Name
Initial
Value R/W Description
5 ORER
0 R/(W)
*
Overrun
Error
Indicates that an overrun error has occurred during
reception and the reception ends abnormally.
[Setting condition]
•
When the next serial reception is completed while
RDRF = 1
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. Note that, in clocked synchronous mode,
serial transmission also cannot continue.
[Clearing condition]
•
When 0 is written to ORER after reading ORER = 1
(When the CPU is used to clear this flag by writing 0
while the corresponding interrupt is enabled, be sure
to read the flag after writing 0 to it.)
Even when the RE bit in SCR is cleared, the ORER
flag is not affected and retains its previous value.
4 ERS 0 R/(W)
*
Error Signal Status
[Setting condition]
•
When a low error signal is sampled
[Clearing condition]
•
When 0 is written to ERS after reading ERS = 1
(When the CPU is used to clear this flag by writing 0
while the corresponding interrupt is enabled, be sure
to read the flag after writing 0 to it.)
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