Datasheet

Section 13 Serial Communication Interface (SCI)
Rev. 3.00 Sep. 28, 2009 Page 264 of 710
REJ09B0384-0300
• Bit Functions in Smart Card Interface Mode (when SMIF in SCMR = 1)
Bit Bit Name
Initial
Value
R/W Description
7 TDRE 1 R/(W)*
1
Transmit Data Register Empty
Indicates whether TDR contains transmit data.
[Setting conditions]
• When the TE bit in SCR is 0
• When data is transferred from TDR to TSR, and TDR
can be written to.
[Clearing conditions]
• When 0 is written to TDRE after reading TDRE = 1
• When a TXI interrupt request is issued allowing DTC to
write data to TDR
6 RDRF 0 R/(W)*
1
Receive Data Register Full
Indicates that receive data is stored in RDR.
[Setting condition]
• When serial reception ends normally and receive data
is transferred from RSR to RDR
[Clearing conditions]
• When 0 is written to RDRF after reading RDRF = 1
• When an RXI interrupt request is issued allowing DTC
to read data from RDR
The RDRF flag is not affected and retains its previous
value when the RE bit in SCR is cleared to 0.
5 ORER 0 R/(W)*
1
Overrun Error
[Setting condition]
When the next serial reception is completed while RDRF =
1
[Clearing condition]
When 0 is written to ORER after reading ORER = 1
4 ERS 0 R/(W)*
1
Error Signal Status
[Setting condition]
When a low error signal is sampled
[Clearing condition]
When 0 is written to ERS after reading ERS = 1