Renesas H8S/2100 Series, Hardware Manual

Page: 119 / 1024

Section 5 Interrupt Controller
Rev. 1.00 Apr. 28, 2008 Page 93 of 994
REJ09B0452-0100
5.3.4 IRQ Sense Control Registers (ISCR16H, ISCR16L, ISCRH, ISCRL)
The ISCR registers select the source that generates an interrupt request at pins
IRQ15
to
IRQ0
or
pins
ExIRQ15
to
ExIRQ6
.
•
ISCR16H
Bit Bit Name Initial Value R/W Description
7
6
IRQ15SCB
IRQ15SCA
0
0
R/W
R/W
5
4
IRQ14SCB
IRQ14SCA
0
0
R/W
R/W
3
2
IRQ13SCB
IRQ13SCA
0
0
R/W
R/W
1
0
IRQ12SCB
IRQ12SCA
0
0
R/W
R/W
IRQn Sense Control B
IRQn Sense Control A
BA
00: Interrupt request generated at low level of
IRQn
or
ExIRQn
input
01: Interrupt request generated at falling edge of
IRQn
or
ExIRQn
input
10: Interrupt request generated at rising edge of
IRQn
or
ExIRQn
input
11: Interrupt request generated at both falling and
rising edges of
IRQn
or
ExIRQn
input
(n = 15 to 12)
Note: The
IRQn
or
ExIRQn
pin is selected by IRQ
sense port select register 16 (ISSR16).