h8s-2111b Renesas Electronics Corporation., h8s-2111b Datasheet - Page 275
h8s-2111b
Manufacturer Part Number
h8s-2111b
Description
Renesas 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2111B.pdf
(582 pages)
- Current page: 275 of 582
- Download datasheet (4Mb)
12.3.7
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
4
Bit Name
TDRE
RDRF
ORER
FER
Serial Status Register (SSR)
Initial
Value
1
0
0
0
R/W
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]
•
[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]
•
[Clearing condition]
•
Framing Error
[Setting condition]
•
[Clearing condition]
•
In 2-stop-bit mode, only the first stop bit is checked.
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 serial reception ends normally and receive
data is transferred from RSR to RDR
When the next data is received while RDRF = 1
When 0 is written to ORER after reading ORER = 1
When the stop bit is 0
When 0 is written to FER after reading FER = 1
When 0 is written to RDRF after reading RDRF = 1
Rev. 1.00, 05/04, page 241 of 544
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