HD6413007F20 Datasheet, PDF (471/798 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

13. Serial Communication Interface
13.2.7 Serial Status Register (SSR)
SSR is an 8-bit register containing multiprocessor bit values, and status flags that indicate the
operating status of the SCI.
Bit
Initial value
Read/Write
7
6
5
4
3
2
TDRE RDRF ORER FER/ERS PER TEND
1
0
0
0
0
1
R/(W)*¹ R/(W)*¹ R/(W)*¹ R/(W)*¹ R/(W)*¹ R
1
MPB
0
R
0
MPBT
0
R/W
Multiprocessor
bit transfer
Value of multiprocessor
bit to be transmitted
Multiprocessor bit
Stores the received
multiprocessor bit
value
Transmit end*²
Status flag indicating end of
transmission
Parity error
Status flag indicating detection of a
receive parity error
Framing error (FER)/Error signal status (ERS)*²
Status flag indicating detection of a receive framing
error, or flag indicating detection of an error signal
Overrun error
Status flag indicating detection of a receive overrun error
Receive data register full
Status flag indicating that data has been received and stored in RDR
Transmit data register empty
Status flag indicating that transmit data has been transferred from
TDR into TSR and new data can be written in TDR
Notes: 1. Only 0 can be written, to clear the flag.
2. Function differs between the normal serial communication interface and
the smart card interface.
Rev.5.00 Sep. 12, 2007 Page 441 of 764
REJ09B0396-0500