Renesas RX Series

R01UH0823EJ0100 Rev.1.00 Page 984 of 1823
Jul 31, 2019
RX23W Group 33. Serial Communications Interface (SCIg, SCIh)
(2) Smart Card Interface Mode (SCMR.SMIF = 1)
Note 1. Only 0 can be written to this bit, to clear the flag. To clear this flag, confirm that the flag is 1 and then set it to 0.
Note 2. Write 1 when writing is necessary.
TEND Flag (Transmit End Flag)
With no error signal from the receiving side, this bit is set to 1 when further data for transfer is ready to be transferred to
the TDR register.
[Setting conditions]
 When the SCR.TE bit = 0 (serial transmission is disabled)
When the SCR.TE bit is changed from 0 to 1, the TEND flag is not affected and retains the value 1.
 When a specified period has elapsed after the latest transmission of 1 byte, the ERS flag is 0, and the TDR register
is not updated
The set timing is determined by register settings as listed below.
When SMR.GM = 0 and SMR.BLK = 0, 12.5 etu after the start of transmission
When SMR.GM = 0 and SMR.BLK = 1, 11.5 etu after the start of transmission
When SMR.GM = 1 and SMR.BLK = 0, 11.0 etu after the start of transmission
When SMR.GM = 1 and SMR.BLK = 1, 11.0 etu after the start of transmission
[Clearing condition]
 When transmit data are written to the TDR register while the SCR.TE bit is 1
When setting the TEND flag to 0 to complete the interrupt handling, refer to
section 15.4.1.2, Operation of
Status Flags for Level-Detected Interrupts
.
Address(es): SMCI1.SSR 0008 A024h, SMCI5.SSR 0008 A0A4h, SMCI8.SSR 0008 A104h, SMCI12.SSR 0008 B304h
b7 b6 b5 b4 b3 b2 b1 b0
TDRE RDRF ORER ERS PER TEND MPB MPBT
Value after reset:
10000100
Bit Symbol Bit Name Description R/W
b0 MPBT Multi-Processor Bit Transfer This bit should be set to 0 in smart card interface mode. R/W
b1 MPB Multi-Processor This bit is not used in smart card interface mode. It should be set
to 0.
R
b2 TEND Transmit End Flag 0: A character is being transmitted.
1: Character transfer has been completed.
R
b3 PER Parity Error Flag 0: No parity error occurred
1: A parity error has occurred
R/(W)
*
1
b4 ERS Error Signal Status Flag 0: Low error signal not responded
1: Low error signal responded
R/(W)
*
1
b5 ORER Overrun Error Flag 0: No overrun error occurred
1: An overrun error has occurred
R/(W)
*
1
b6 RDRF Receive Data Full Flag 0: No valid data is held in the RDR register
1: Received data is held in the RDR register
R/(W)
*
2
b7 TDRE Transmit Data Empty Flag 0: Data to be transmitted is held in the TDR register
1: No data is held in the TDR register
R/(W)
*
2