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SCSR1—Serial control status register 1
H'A1
SCI1
Bit
Initial value
Read/Write
7
—
1
—
6
SOL
0
R/W
5
ORER
0
R/(W)
4
—
1
—
3
—
1
—
0
STF
0
R/W
2
—
1
—
1
MTRF
0
R
Extension data bit
Overrun error flag
*
Start flag
0
Transfer operation stopped
Invalid
Transfer operation in progress
Starts transfer operation
1
Read
Write
Read
Write
Note:
*
Only a write of 0 for flag clearing is possible.
0
Clearing conditions:
After reading ORER = 1, cleared by writing 0 to ORER
1
Setting conditions:
When an external clock is used and the clock is input
after transfer is completed
0
SO
1
output level is low
Changes SO
1
output to low level
SO
1
output level is high
Changes SO
1
output to high level
1
Read
Write
Read
Write
Tail mark transmission flag
0
Idle state, or 8-bit/16-bit data transfer in progress
1
Tail mark transmission in progress
Summary of Contents for H8/3935
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