Appendix B Internal I/O Registers
Rev.3.00 Jul. 19, 2007 page 476 of 532
REJ09B0397-0300
SCSR1—Serial control/status register 1
H'A1
SCI1
(H8/3857 Group only)
Bit
Initial value
Read/Write
7
⎯
1
⎯
6
SOL
0
R/W
5
ORER
0
R/(W)
4
⎯
0
⎯
3
⎯
0
⎯
0
STF
0
R/W
2
⎯
0
⎯
1
⎯
0
⎯
Extended data bit
Overrun error flag
0
Read
1
*
Start flag
0
Indicates that transfer is stopped
Invalid
1
Read
Write
Read
Write
Indicates transfer in progress
Starts a transfer operation
Note: Only a write of 0 for flag clearing is possible.
*
0
[Clearing condition]
After reading 1, cleared by writing 0
1
[Setting condition]
Set if a clock pulse is input after transfer
is complete, when an external clock is used
SO pin output level is low
1
Write
SO pin output level changes to low
1
Read
SO pin output level is high
1
Write
SO pin output level changes to high
1
Summary of Contents for F-ZTAT H8 Series
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Page 194: ...7 RAM Rev 3 00 Jul 19 2007 page 168 of 532 REJ09B0397 0300...
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