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83
Bits 7 and 6—Reserved: These bits can be written and read, but they do not enable or disable
interrupts.
Bits 5 to 0—IRQ
5
to IRQ
0
Enable (IRQ5E to IRQ0E): These bits enable or disable
IRQ
5
to IRQ
0
interrupts.
Bits 5 to 0
IRQ5E to IRQ0E Description
0
IRQ
5
to IRQ
0
interrupts are disabled
(Initial value)
1
IRQ
5
to IRQ
0
interrupts are enabled
5.2.5
IRQ Sense Control Register (ISCR)
ISCR is an 8-bit readable/writable register that selects level sensing or falling-edge sensing of the
inputs at pins
IRQ
5
to
IRQ
0
.
Bit
Initial value
Read/Write
7
—
0
R/W
These bits select level sensing or falling-edge
sensing for IRQ to IRQ interrupts
6
—
0
R/W
5
IRQ5SC
0
R/W
4
IRQ4SC
0
R/W
3
IRQ3SC
0
R/W
2
IRQ2SC
0
R/W
1
IRQ1SC
0
R/W
0
IRQ0SC
0
R/W
5
0
IRQ to IRQ sense control
5
0
Reserved bits
ISCR is initialized to H'00 by a reset and in hardware standby mode.
Bits 7 and 6—Reserved: These bits can be written and read, but they do not select level or
falling-edge sensing.
Bits 5 to 0—IRQ
5
to IRQ
0
Sense Control (IRQ5SC to IRQ0SC): These bits select whether
interrupts IRQ
5
to IRQ
0
are requested by level sensing of pins
IRQ
5
to
IRQ
0
, or by falling-edge
sensing.
Bits 5 to 0
IRQ5SC to IRQ0SC Description
0
Interrupts are requested when
IRQ
5
to
IRQ
0
inputs are low
(Initial value)
1
Interrupts are requested by falling-edge input at
IRQ
5
to
IRQ
0
Содержание H8/3008
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