M-V850E-IA4 Renesas Electronics America, M-V850E-IA4 Datasheet - Page 685

• Manufacturer Part Number: M-V850E-IA4
• Description: KIT EVAL V850E IA4 UPD70F3186
• Manufacturer: Renesas Electronics America

Specifications of M-V850E-IA4

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Default priority
a > b > c
Interrupt request a (level 2)
Interrupt request b (level 1)
Interrupt request c (level 1)
Caution To perform multiple interrupt servicing, the values of the EIPC and EIPSW registers must be
Remarks 1. a to c in the figure are assumed names given to interrupt request signals for the sake of
Figure 17-7. Example of Servicing Interrupt Request Signals Generated Simultaneously
2. The default priority in the figure indicates the relative priority between two interrupt request
saved before executing the EI instruction. When returning from multiple interrupt servicing,
restore the values of EIPC and EIPSW after executing the DI instruction.
explanation.
signals.
Main routine
CHAPTER 17 INTERRUPT/EXCEPTION PROCESSING FUNCTION
EI
User’s Manual U16543EJ4V0UD
Servicing of interrupt request b
Servicing of interrupt request c
Servicing of interrupt request a
.
.
Interrupt request b and c are
acknowledged first according to
their priorities.
Because the priorities of b and c are
the same, b is acknowledged first
according to the default priority.
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