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Chapter 7
Interrupt/Exception Processing Function
User’s Manual U16580EE3V1UD00
7.2 Non-maskable
Interrupt
A non-maskable interrupt request is acknowledged unconditionally, even when interrupts are in the
interrupt disabled (DI) status. A NMI is not subject to priority control and takes precedence over all the
other interrupts.
A non-maskable interrupt request is input from the NMI pin. When the valid edge specified by ESN0,
ESN1 bits of the interrupt mode register 0 (INTM0) is detected at the NMI pin, the interrupt occurs.
While the service program of the non-maskable interrupt is being executed (PSW.NP = 1), the
acknowledgment of another non-maskable interrupt request is held pending. The pending NMI is
acknowledged after the original service program of the non-maskable interrupt under execution has
been terminated (by the RETI instruction). Note that if two or more NMI requests are input during the
execution of the service program for a NMI, the number of NMIs that will be acknowledged after
PSW.NP is cleared to 0 is only one.
Remark:
PSW.NP: The NP bit of the PSW register.
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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