Interrupt Control Register 0 (Icr0) - Renesas HD6417641 Hardware Manual

10.3.2

Interrupt Control Register 0 (ICR0)

ICR0 is a register that sets the input signal detection mode of external interrupt input pin NMI, and
indicates the input signal level at the NMI pin. This register is initialized to H'0000 or H'8000 by a
power-on reset or manual reset, but is not initialized in standby mode.
Bit Bit Name
15 NMIL

14 to 9
8 NMIE

7 to 0
1 when NMI input is high, 0 when NMI input is low.
Note: *
Initial
Value R/W Description
0/1* R NMI Input Level
Sets the level of the signal input at the NMI pin. This bit
can be read from to determine the NMI pin level. This
bit cannot be modified.
0: NMI input level is low
1: NMI input level is high
All 0 R Reserved
These bits are always read as 0. The write value should
always be 0.
0 R/W NMI Edge Select
Selects whether the falling or rising edge of the
interrupt request signal on the NMI pin is detected.
0: Interrupt request is detected on falling edge of NMI
1: Interrupt request is detected on rising edge of NMI
All 0 R Reserved
These bits are always read as 0. The write value should
always be 0.
Section 10 Interrupt Controller (INTC)
input
input
Rev. 4.00 Sep. 14, 2005 Page 225 of 982
REJ09B0023-0400