h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 131

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

5.2.4
The ISCR registers are 16-bit readable/writable registers that select rising edge, falling edge, or
both edge detection, or level sensing, for the input at pins IRQ5 to IRQ0.
The ISCR registers are initialized to H'0000 by a reset and in hardware standby mode.
Bits 15 to 12—Reserved: These bits are always read as 0, and should only be written with 0.
Bits 11 to 0: IRQ5 Sense Control A and B (IRQ5SCA, IRQ5SCB) to IRQ0 Sense Control A and
B (IRQ0SCA, IRQ0SCB)
IRQ5SCB to
IRQ0SCB
0
1
Bit
Initial value
R/W
Bit
Initial value
R/W
ISCRH
ISCRL
IRQ Sense Control Registers H and L (ISCRH, ISCRL)
Bits 11 to 0
:
:
:
:
:
:
IRQ5SCA to
IRQ0SCA
0
1
0
1
IRQ3SCB
R/W
R/W
15
—
0
7
0
IRQ3SCA
R/W
R/W
14
—
0
6
0
Description
Interrupt request generated at IRQ5 to IRQ0 input low level
Interrupt request generated at falling edge of IRQ5 to IRQ0 input
Interrupt request generated at rising edge of IRQ5 to IRQ0 input
Interrupt request generated at both falling and rising edges of
IRQ5 to IRQ0 input
IRQ2SCB
R/W
R/W
13
—
0
5
0
IRQ2SCA
R/W
R/W
12
—
0
4
0
Rev. 5.00 Sep 22, 2005 page 105 of 1136
IRQ5SCB
IRQ1SCB
R/W
R/W
11
0
3
0
IRQ5SCA
IRQ1SCA
Section 5 Interrupt Controller
R/W
R/W
10
0
2
0
IRQ4SCB
IRQ0SCB
R/W
R/W
REJ09B0257-0500
9
0
1
0
(initial value)
IRQ4SCA
IRQ0SCA
R/W
R/W
8
0
0
0