r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 326

• Manufacturer Part Number: r8a77850anbg
• Description: Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

10. Interrupt Controller (INTC)
(11) NMI Flag Control Register (NMIFCR)
NMIFCR is a 32-bit readable and conditionally writable register that has an NMI flag (NMIFL
bit). The NMIFL bit is automatically set to 1 when an NMI interrupt is detected by the INTC.
Writing 0 to the NMIFL bit clears it.
The value of the NMIFL bit does not affect acceptance of the NMI by the CPU. Although an NMI
request detected by the INTC is cleared when the CPU accepts the NMI, the NMIFL bit is not
cleared automatically. Even if 0 is written to the NMIFL bit before the NMI request is accepted by
the CPU, the NMI request is not canceled.
Rev.1.00 Jan. 10, 2008 Page 296 of 1658
REJ09B0261-0100
Initial value:
Initial value:
Bit
31
30 to 17 —
R/W:
R/W:
Bit:
Bit:
Name
NMIL
NMIL
31
15
⎯
R
R
x
0
30
⎯
14
⎯
R
R
0
0
Initial
Value
x
All 0
29
⎯
13
⎯
R
R
0
0
28
12
⎯
⎯
R
R
0
0
27
11
⎯
⎯
R
R
0
0
R/W
R
R
26
10
⎯
⎯
R
R
0
0
Description
NMI Input Level
Indicates the level of the signal input to the NMI pin;
that is, this bit is read to determine the level on the NMI
pin. This bit cannot be modified.
0: The low level is being input to the NMI pin
1: The high level is being input to the NMI pin
Reserved
These bits are always read as 0. The write value
should always be 0.
25
⎯
⎯
R
R
0
9
0
24
⎯
⎯
R
R
0
8
0
23
⎯
⎯
R
R
0
7
0
22
⎯
⎯
R
R
0
6
0
21
⎯
⎯
R
R
0
5
0
20
⎯
⎯
R
R
0
4
0
19
⎯
⎯
R
R
0
3
0
18
⎯
⎯
R
R
0
2
0
17
⎯
⎯
R
R
0
1
0
NMIFL
R/(W)
16
⎯
R
0
0
0