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Chapter 7
Interrupt/Exception Processing Function
User’s Manual U16580EE3V1UD00
7.3.3 Priorities of maskable interrupts
The V850E/PH2 provides multiple interrupt servicing in which an interrupt is acknowledged while
another interrupt is being serviced. Multiple interrupts can be controlled by priority levels.
There are two types of priority level control: control based on the default priority levels, and control
based on the programmable priority levels that are specified by the interrupt priority level specification
bit (PRn) of the interrupt control register (PICn). When two or more interrupts having the same priority
level specified by the PRn bit are generated at the same time, interrupts are serviced in order
depending on the priority level allocated to each interrupt request type (default priority level)
beforehand. For more information, refer to
Table 7-1, “Interrupt/Exception Source List,” on
. The programmable priority control customizes interrupt requests into eight levels by setting
the priority level specification flag.
Note that when an interrupt request is acknowledged, the ID flag of PSW is automatically set to 1.
Therefore, when multiple interrupts are to be used, clear the ID flag to 0 beforehand (for example, by
placing the EI instruction in the interrupt service program) to set the interrupt enable mode.
Remark:
n = 0 to 105 (number of interrupt)
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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