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Chapter 7
Interrupt/Exception Processing Function
User’s Manual U16580EE3V1UD00
7.2.1 Operation
If a non-maskable interrupt is generated, the CPU performs the following processing, and transfers
control to the handler routine:
(1) Saves the restored PC to FEPC.
(2) Saves the current PSW to FEPSW.
(3) Writes exception code 0010H to the higher half-word (FECC) of ECR.
(4) Sets the NP and ID bits of the PSW and clears the EP bit.
(5) Sets the handler address (00000010H) corresponding to the non-maskable interrupt to the PC,
and transfers control.
The processing configuration of a non-maskable interrupt is shown in Figure 7-1.
Figure 7-1:
Processing Configuration of Non-Maskable Interrupt
Non-maskable interrupt
request
FEPC
Restored PC
FEPSW
PSW
ECR.FECC
Exception
code
PSW.NP
1
PSW.EP
0
PSW.ID
1
PC
NMI-Handler
address
0
PSW.NP
INTC
acknowledgement
CPU processing
1
Interrupt service
Interrupt request pending
NMI input
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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