243
Chapter 7
Interrupt/Exception Processing Function
User’s Manual U16580EE3V1UD00
7.3.7 Maskable interrupt status flag (ID)
The ID flag is bit 5 of the PSW and controls the maskable interrupt’s operating state, and stores control
information regarding enabling or disabling of interrupt requests.
Figure 7-14:
Maskable interrupt status flag (ID)
Note:
Interrupt disable flag (ID) function
•
This flag is set to 1 by the DI instruction and reset to 0 by the EI instruction. Its value is also
modified by the RETI instruction or LDSR instruction when referencing the PSW.
•
Non-maskable interrupt and exceptions are acknowledged regardless of this flag. When a
maskable interrupt is acknowledged, the ID flag is automatically set to 1 by hardware.
•
The interrupt request generated during the acknowledgement disabled period (ID = 1) can
be acknowledged when the IFn bit of the interrupt control register PICn is set to 1, and the
ID flag is reset to 0.
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
ID
Maskable Interrupt Servicing Specification
Note
0
Maskable interrupt request acknowledgment enabled
1
Maskable interrupt request acknowledgment disabled (pending)
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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