RX610 Group
20. Serial Communications Interface (SCI)
R01UH0032EJ0120 Rev.1.20
Page 627 of 1006
Feb 20, 2013
(2) Smart Card Interface Mode (SMIF in SCMR = 1)
TEND
Addresses: SCI0.SSR 0008 8244h, SCI1.SSR 0008 824Ch, SCI2.SSR 0008 8254h, SCI3.SSR 0008 25Ch,
SCI4.SSR 0008 8264h, SCI5.SSR 0008 826Ch, SCI6.SSR 0008 8274h
b7
b6
b5
b4
b3
b2
b1
b0
Value after reset:
1
0
0
0
0
1
0
0
TDRE
RDRF
ORER
ERS
PER
—
—
x: Undefined
Bit
Symbol
Bit Name
Function
R/W
b0, b1
Reserved
These bits are read as 0. The write value should be 0.
R/W
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: When data is transferred from RDR
1: When data has been received normally, and transferred from
RSR to RDR
R/W
*
2
b7
TDRE
Transmit Data Empty Flag
0: When data is transferred to TDR
1: When data is transferred from TDR to TSR
R/W
*
2
Notes: 1. Only 0 can be written to this bit, to clear the flag.
2. Write 1 when writing is necessary.
SSR is a register containing status flags of the SCI.
TEND Flag (Transmission 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 SCR.TE bit = 0 (disabling serial transmission operations) and ERS flag = 0
•
When a specified period has elapsed after the latest transmission of one 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]
•
Writing further data for transmission to the TDR register