![Hitachi H8/3008 Hardware Manual Download Page 591](http://html.mh-extra.com/html/hitachi/h8-3008/h8-3008_hardware-manual_140473591.webp)
575
SSR—Serial Status Register
H'FFFB4
SCI0
Bit
Initial value
Read/Write
1
R/(W)
*
7
TDRE
0
R/(W)
*
6
RDRF
0
R/(W)
*
5
ORER
0
R/(W)
*
4
FER/ERS
0
R/(W)
*
3
PER
1
R
2
TEND
0
R
1
MPB
0
R/W
0
MPBT
Transmit end (for serial communication interface)
0
Multiprocessor bit transfer
0
1
Multiprocessor bit value in transmit data is 0
Multiprocessor bit value in transmit data is 1
Multiprocessor bit
0
1
Multiprocessor bit value in receive data is 0
Multiprocessor bit value in receive data is 1
[Clearing conditions]
Read TDRE when TDRE = 1, then write 0 in TDRE.
[Setting conditions]
• Reset or transition to standby mode
• TE is cleared to 0 in SCR.
• TDRE is 1 when last bit of 1-byte serial character is
transmitted.
Parity error
0
1
[Clearing conditions] • Reset or transition to standby mode
• Read PER when PER = 1, then write 0 in PER.
[Setting condition]
Parity error (parity of receive data does not match parity
setting of O/
E
bit in SMR)
Framing error (for serial communication interface)
0
[Clearing conditions]
• Reset or transition to standby mode
• Read FER when FER = 1, then write 0 in FER.
[Setting condition]
Framing error (stop bit is 0)
Error signal status (for smart card interface)
0
[Clearing conditions]
• Reset or transition to standby mode
• Read ERS when ERS = 1, then write 0 in ERS.
[Setting condition]
A low error signal is received.
1
1
Overrun error
0
[Clearing conditions]
• Reset or transition to standby mode
• Read ORER when ORER = 1, then write 0 in ORER.
[Setting condition]
Overrun error (reception of the next serial data ends when RDRF = 1)
1
Receive data register full
0
[Clearing conditions]
• Reset or transition to standby mode
• Read RDRF when RDRF = 1, then write 0 in RDRF.
[Setting condition]
Serial data is received normally and transferred from RSR to RDR.
1
Transmit data register empty
Note:
*
Only 0 can be written, to clear the flag.
0
[Clearing conditions] • Read TDRE when TDRE = 1, then write 0 in TDRE.
[Setting conditions]
• Reset or transition to standby mode
• TE is 0 in SCR.
• Data is transferred from TDR to TSR, enabling new data to be written in TDR
1
1
Transmit end (for smart card interface)
0
[Clearing conditions]
Read TDRE when TDRE = 1, then write 0 in TDRE.
[Setting conditions]
• Reset or transition to standby mode
• TE is cleared to 0 in SCR and FER/ERS is cleared to 0.
• TDRE is 1 and FER/ERS is 0 (normal transmission)
2.5 etu* (when GM = 0) or 1.0 etu (when GM = 1) after
1-byte serial character is transmitted.
1
Note:
*
etu: Elementary time unit (time required to transmit one bit)
Summary of Contents for H8/3008
Page 1: ...Hitachi 16 Bit Microcomputer H8 3008 Hardware Manual ADE 602 221 Rev 1 0 9 14 00 Hitachi Ltd ...
Page 4: ......
Page 17: ...xii ...
Page 70: ...54 ...
Page 114: ...98 ...
Page 154: ...138 ...
Page 314: ...298 ...
Page 412: ...396 ...
Page 496: ...480 ...