h8s-2172 Renesas Electronics Corporation., h8s-2172 Datasheet - Page 99

• Manufacturer Part Number: h8s-2172
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family H8s-2100 Series
• Manufacturer: Renesas Electronics Corporation.

5.3.4
The ISCR registers select the source that generates an interrupt request at pins IRQ7 to IRQ0.
The IRQ7 to IRQ0 pins can be switched to input pins by setting the IRQ sense port select register
(ISSR).
• ISCRH
• ISCRL
Bit
7
6
5
4
3
2
1
0
Bit
7
6
5
4
3
2
1
0
Bit Name
IRQ7SCB
IRQ7SCA
IRQ6SCB
IRQ6SCA
IRQ5SCB
IRQ5SCA
IRQ4SCB
IRQ4SCA
Bit Name
IRQ3SCB
IRQ3SCA
IRQ2SCB
IRQ2SCA
IRQ1SCB
IRQ1SCA
IRQ0SCB
IRQ0SCA
IRQ Sense Control Registers H, L (ISCRH, ISCRL)
Initial
Value
0
0
0
0
0
0
0
0
Initial
Value
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
(n = 7 to 4)
(n = 3 to 0)
Description
IRQn Sense Control B
IRQn Sense Control A
00: Interrupt request generated at low level of IRQn
01: Interrupt request generated at falling edge of IRQn
10: Interrupt request generated at rising edge of IRQn
11: Interrupt request generated at both falling and rising
Description
IRQn Sense Control B
IRQn Sense Control A
00: Interrupt request generated at low level of IRQn
01: Interrupt request generated at falling edge of IRQn
10: Interrupt request generated at rising edge of IRQn
11: Interrupt request generated at both falling and rising
input
input
input
edges of IRQn input
input
input
input
edges of IRQn input
Rev. 2.00, 03/04, page 67 of 534