Renesas H8S/2100 Series Hardware Manual page 400

Section 14 Serial Communication Interface (SCI)
• Bit Functions in Smart Card Interface Mode (when SMIF in SCMR = 1)
Bit Bit Name
7 TDRE
6 RDRF
5 ORER
4 ERS
Rev. 1.00 May 09, 2008 Page 374 of 954
REJ09B0462-0100
Initial Value R/W
1 R/(W)* Transmit Data Register Empty
0 R/(W)*
0 R/(W)*
0 R/(W)*
Description
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 condition]
When 0 is written to TDRE after reading TDRE = 1
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 condition]
When 0 is written to RDRF after reading RDRF = 1
The RDRF flag is not affected and retains its
previous value when the RE bit in SCR is cleared
to 0.
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
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