R01UH0823EJ0100 Rev.1.00
Page 277 of 1823
Jul 31, 2019
RX23W Group
15. Interrupt Controller (ICUb)
15.2.8
IRQ Control Register i (IRQCRi) (i = 0, 1, and 4 to 7)
Only change the settings of this register while the corresponding interrupt request enable bit is prohibiting the interrupt
request (IENj bit in IERm (m = 02h to 1Fh, j = 0 to 7) is 0). After changing the setting, clear the IR flag in IRn before
setting the interrupt enable bit. However, when the change is to the low level, the IR flag does not require clearing.
IRQMD[1:0] Bits (IRQ Detection Sense Select)
These bits select the interrupt detection sensing method of IRQi pin.
For the external pin interrupt detection setting, see
section 15.4.8, External Pin Interrupts
Address(es): ICU.IRQCR0 0008 7500h, ICU.IRQCR1 0008 7501h, ICU.IRQCR4 0008 7504h to ICU.IRQCR7 0008 7507h
b7
b6
b5
b4
b3
b2
b1
b0
—
—
—
—
IRQMD[1:0]
—
—
Value after reset:
0
0
0
0
0
0
0
0
Bit
Symbol
Bit Name
Description
R/W
b1, b0
—
Reserved
These bits are read as 0. The write value should be 0.
R/W
b3, b2
IRQ Detection Sense
Select
b3 b2
0 0: Low level
0 1: Falling edge
1 0: Rising edge
1 1: Rising and falling edges
R/W
b7 to b4
—
Reserved
These bits are read as 0. The write value should be 0.
R/W