Interrupt Request Register 0 (Irr0) - Renesas HD6417641 Hardware Manual

Section 10 Interrupt Controller (INTC)
10.3.5

Interrupt Request Register 0 (IRR0)

IRR0 is an 8-bit register that indicates interrupt requests from external input pins IRQ7 to IRQ0.
This register is initialized to H'00 by a power-on reset or manual reset, but is not initialized in
standby mode.
Bit Bit Name
7 IRQ7R
6 IRQ6R
5 IRQ5R
4 IRQ4R
3 IRQ3R
2 IRQ2R
1 IRQ1R
0 IRQ0R
Rev. 4.00 Sep. 14, 2005 Page 228 of 982
REJ09B0023-0400
Initial
Value R/W Description
0 R/W IRQn Interrupt Request
0 R/W Indicates whether there is interrupt request input to the
IRQn pin. When edge-detection mode is set for IRQn,
0 R/W
an interrupt request is cleared by writing 0 to the IRQnR
0 R/W
bit after reading IRQnR = 1.
When level-detection mode is set for IRQn, an interrupt
0 R/W
request is set/cleared by only 1/0 input to the IRQn pin.
0 R/W
0 R/W
IRQnR
0 R/W
0: No interrupt request input to IRQn pin
1: Interrupt request input to IRQn pin
n = 0 to 7