h8s-2161b Renesas Electronics Corporation., h8s-2161b Datasheet - Page 420
h8s-2161b
Manufacturer Part Number
h8s-2161b
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2161B.pdf
(845 pages)
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Section 15 Serial Communication Interface (SCI and IrDA)
15.3.7
SSR is a register containing status flags of the SCI and multiprocessor bits for transfer. TDRE,
RDRF, ORER, PER, and FER can only be cleared.
Bit
7
6
5
Rev. 3.00 Mar 21, 2006 page 366 of 788
REJ09B0300-0300
Bit Name
TDRE
RDRF
ORER
Serial Status Register (SSR)
Initial Value
1
0
0
R/W
R/(W) *
R/(W) *
R/(W) *
Description
Transmit Data Register Empty
Indicates whether TDR contains transmit data.
[Setting conditions]
[Clearing conditions]
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]
The RDRF flag is not affected and retains its
previous value when the RE bit in SCR is cleared to
0.
Overrun Error
[Setting condition]
When the next data is received while RDRF = 1
[Clearing condition]
When 0 is written to ORER after reading
ORER = 1
When the TE bit in SCR is 0
When data is transferred from TDR to TSR and
TDR is ready for data write
When 0 is written to TDRE after reading
TDRE = 1
When a TXI interrupt request is issued allowing
the DTC to write data to TDR
RDRF = 1
When an RXI interrupt request is issued allowing
the DTC to read data from RDR
When 0 is written to RDRF after reading
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