Renesas H8S/2111B Network Card User Manual


 
Rev. 1.00, 05/04, page 72 of 544
5.3.4 IRQ Sense Control Registers (ISCRH, ISCRL)
The ISCR registers select the source that generates an interrupt request at pins IRQ7 to IRQ0.
ISCRH
Bit Bit Name
Initial
Value
R/W Description
7
6
IRQ7SCB
IRQ7SCA
0
0
R/W
R/W
5
4
IRQ6SCB
IRQ6SCA
0
0
R/W
R/W
3
2
IRQ5SCB
IRQ5SCA
0
0
R/W
R/W
1
0
IRQ4SCB
IRQ4SCA
0
0
R/W
R/W
IRQn Sense Control B
IRQn Sense Control A
00: Interrupt request generated at low level of IRQn
input
01: Interrupt request generated at falling edge of IRQn
input
10: Interrupt request generated at rising edge of IRQn
input
11: Interrupt request generated at both falling and
rising edges of IRQn input
(n = 7 to 4)
ISCRL
Bit Bit Name
Initial
Value R/W Description
7
6
IRQ3SCB
IRQ3SCA
0
0
R/W
R/W
5
4
IRQ2SCB
IRQ2SCA
0
0
R/W
R/W
3
2
IRQ1SCB
IRQ1SCA
0
0
R/W
R/W
1
0
IRQ0SCB
IRQ0SCA
0
0
R/W
R/W
IRQn Sense Control B
IRQn Sense Control A
00: Interrupt request generated at low level of IRQn
input
01: Interrupt request generated at falling edge of IRQn
input
10: Interrupt request generated at rising edge of IRQn
input
11: Interrupt request generated at both falling and
rising edges of IRQn input
(n = 3 to 0)