Section 6 Interrupt Controller (INTC)
Rev. 3.00 Sep. 27, 2007 Page 93 of 758
REJ09B0243-0300
6.3.1
Interrupt Control Register 0 (ICR0)
ICR0 is a 16-bit register that sets the input signal detection mode of the external interrupt input pin
NMI and indicates the input signal level on the NMI pin.
Bit:
Initial value:
R/W:
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Note:
The initial value is 1 when the level on the NMI pin is high, and 0 when the level on the pin is low.
*
*
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
R
R
R
R
R
R
R
R/W
R
R
R
R
R
R
R
R
NMIL
-
-
-
-
-
-
NMIE
-
-
-
-
-
-
-
-
Bit Bit
Name
Initial
Value
R/W Description
15 NMIL
*
R
NMI Input Level
Indicates the state of the signal input to the NMI pin.
This bit can be read to determine the NMI pin level. This
bit cannot be modified.
0: State of the NMI input is low
1: State of the NMI input is high
14 to 9
All
0
R
Reserved
These bits are always read as 0. The write value should
always be 0.
8
NMIE
0
R/W
NMI Edge Select
0: Interrupt request is detected on the falling edge of the
NMI input
1: Interrupt request is detected on the rising edge of the
NMI input
7 to 0
All
0
R
Reserved
These bits are always read as 0. The write value should
always be 0.
Содержание SH7124 R5F7124
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