HD6433832S Datasheet, PDF (487/560 Pages) Renesas Technology Corp – single-chip microcomputers

SCSR1—Serial control/status register 1
Bit
Initial value
Read/Write
7
6
5
4
—
SOL ORER —
1
0
0
0
—
R/W R/(W)* —
H'A1
3
2
—
—
0
0
—
—
SCI1
1
0
—
STF
0
0
—
R/W
Start flag
0 Read
Write
1 Read
Write
Indicates that transfer is stopped
Invalid
Indicates transfer in progress
Starts a transfer operation
Overrun error flag
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
Extended data bit
0 Read SO₁ pin output level is low
Write SO₁ pin output level changes to low
1 Read SO₁ pin output level is high
Write SO₁ pin output level changes to high
Note: * Only a write of 0 for flag clearing is possible.
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