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Chapter 7
Interrupt/Exception Processing Function
User’s Manual U16580EE3V1UD00
7.2.3 Non-maskable interrupt status flag (NP)
The NP flag is a status flag that indicates that non-maskable interrupt (NMI) processing is under
execution.
This flag is set when a NMI interrupt has been acknowledged, and masks all interrupt requests and
exceptions to prohibit multiple interrupts from being acknowledged.
Figure 7-4:
Non-maskable Interrupt Status Flag (NP)
7.2.4 Edge Detection Function
The behaviour of the non-maskable interrupt (NMI) can be specified by the interrupt mode register 0
(INTM0). The valid edge of the external NMI pin input can be specified by the ESN0 and ESN1 bits.
The INTM0 register can be read/written in 8-bit or 1-bit units.
Figure 7-5:
NMI Edge Detection Specification: Interrupt Mode Register 0 (INTM0)
31
8 7 6 5
4
3 2 1 0
After reset
00000020H
PSW
0 0 0 0 0 0 0 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
NP
EP ID SAT CY OV S Z
NP
NMI Servicing Status
0
No NMI interrupt servicing
1
NMI interrupt currently servicing
After reset:
00H
R/W
Address:
FFFFF880H
7
6
5
4
3
2
1
0
INTM0
ES21
ES20
ES11
ES10
ES01
ES00
ESN1
ESN0
ESN1
ESN0
Valid Edge Specification of NMI pin input
0
0
Falling edge
0
1
Rising edge
1
0
Setting prohibited
1
1
Both, rising and falling edges
Summary of Contents for MuPD70F3187
Page 6: ...6 Preface User s Manual U16580EE3V1UD00 ...
Page 16: ...16 User s Manual U16580EE3V1UD00 ...
Page 28: ...28 User s Manual U16580EE3V1UD00 ...
Page 32: ...32 User s Manual U16580EE3V1UD00 ...
Page 84: ...84 Chapter 2 Pin Functions User s Manual U16580EE3V1UD00 MEMO ...
Page 144: ...144 Chapter 3 CPU Functions User s Manual U16580EE3V1UD00 MEMO ...
Page 312: ...312 Chapter 9 16 Bit Timer Event Counter P User s Manual U16580EE3V1UD00 MEMO ...
Page 534: ...534 Chapter 11 16 bit Timer Event Counter T User s Manual U16580EE3V1UD00 ...
Page 969: ...969 Chapter 20 Port Functions User s Manual U16580EE3V1UD00 MEMO ...
Page 970: ...970 Chapter 20 Port Functions User s Manual U16580EE3V1UD00 ...
Page 976: ...976 Chapter 22 Internal RAM Parity Check Function User s Manual U16580EE3V1UD00 MEMO ...
Page 984: ...984 Chapter 23 On Chip Debug Function OCD User s Manual U16580EE3V1UD00 MEMO ...
Page 1006: ...1006 Chapter 24 Flash Memory User s Manual U16580EE3V1UD00 MEMO ...
Page 1036: ...1036 Chapter 27 Recommended Soldering Conditions User s Manual U16580EE3V1UD00 MEMO ...
Page 1046: ...1046 Appendix A Index User s Manual U16580EE3V1UD00 MEMO ...
Page 1052: ...1052 User s Manual U16580EE3V1UD00 ...
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