Renesas SH7641 - Manual (Page 277)

Section 10 Interrupt Controller (INTC)
Rev. 4.00 Sep. 14, 2005 Page 227 of 982
REJ09B0023-0400
10.3.4 Interrupt Control Register 3 (ICR3)
ICR3 is a 16-bit register that specifies the detection mode for external interrupt input pins
IRQ7
and
IRQ6 individually: rising edge, falling edge, high level, or low level. This register is
initialized to H'0000 by a power-on reset or manual reset, but is not initialized in standby mode.
Bit Bit Name
Initial
Value R/W
Description
15 to 4  All 0 R Reserved
These bits are always read as 0. The write value should
always be 0.
3
2
1
0
IRQ71S
IRQ70S
IRQ61S
IRQ60S
0
0
0
0
R/W
R/W
R/W
R/W
IRQn Sense Select
These bits select whether interrupt request signals
corresponding to pins
IRQ7 and IRQ6 are detected by
a rising edge, falling edge, high level, or low level.
Bit 2n+1 Bit 2n
IRQn1S IRQn0S
0 0 : Interrupt request is detected at the
falling edge of
IRQn input
0 1 : Interrupt request is detected at the
rising edge of
IRQn input
1 0 : Interrupt request is detected on low
level of
IRQn input
1 1 : Interrupt request is detected on high
level of
IRQn input
n = 6 and 7