
719
SEMR0—Serial Extended Mode Register 0
H'FDF8
SCI0
7
SSE
0
R/W
6
—
Unde-
fined
—
5
—
Unde-
fined
—
4
—
Unde-
fined
—
3
ABCS
0
R/W
0
ACS0
0
R/W
2
ACS2
0
R/W
1
ACS1
0
R/W
Bit
Initial value
R/W
Asynchronous Base Clock Select
SCI0 Select Enable
SCI0 select function disabled
SCI0 select function enabled
When PG1/IRQ7 pin input = 1, TxD0 goes to high-impedance state and SCK0 clock
input is fixed high
0
1
0
1
SCI0 operates on base clock with frequency of 16 times transfer rate
SCI0 operates on base clock with frequency of 8 times transfer rate
Asynchronous Clock Source Select 2 to 0
External clock input
115.152 kbps average transfer rate
(for = 10.667 MHz only) is selected (SCI0 operates
on base clock with frequency of 16 times transfer rate)
460.606 kbps average transfer rate
(for = 10.667 MHz only) is selected (SCI0 operates on
base clock with frequency of 8 times transfer rate)
Reserved
TPU clock input (AND of TIOCA1 and TIOCA2)
115.196 kbps average transfer rate (for = 16 MHz only)
is selected (SCI0 operates on base clock with frequency
of 16 times transfer rate)
460.784 kbps average transfer rate (for = 16 MHz only)
is selected (SCI0 operates on base clock with frequency
of 16 times transfer rate)
720 kbps average transfer rate (for = 16 MHz only)
is selected (SCI0 operates on base clock with frequency
of 8 times transfer rate)
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Reserved Bits
Write 0 to these bits