RX610 Group
20. Serial Communications Interface (SCI)
R01UH0032EJ0120 Rev.1.20
Page 624 of 1006
Feb 20, 2013
20.2.7
Serial Status Register (SSR)
Note:
Some bits in SSR have different functions in serial communications interface mode and smart card interface
mode.
(1) Serial Communications Interface Mode (SMIF in SCMR = 0)
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
FER
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
FER
Framing Error Flag
0: No framing error occurred
1: A framing error has occurred
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)
Indicates completion of transmission.
[Setting conditions]
•
Clearing of the SCR.TE bit to 0 (disabling serial transmission operations)
•
The TDR is not updated at the time of transmission of the tail-end bit of a character being transmitted
[Clearing condition]
•
Writing of further data for transmission to the TDR
When the TEND flag is cleared by writing the data for transmission to the TDR, read the TEND flag and check that it has
actually been cleared to 0.
Summary of Contents for RX600 Series
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