upd70f3017ay Renesas Electronics Corporation., upd70f3017ay Datasheet - Page 118

• Manufacturer Part Number: upd70f3017ay
• Description: V850/sa1tm 32-/16-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

5.3.3 Priorities of maskable interrupts
being serviced. Multiple interrupts can be controlled by priority levels.
programmable priority levels which are specified by the interrupt priority level specification bit (xxPRn). When two or
more interrupts having the same priority level specified by xxPRn 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.
customizes interrupt requests into eight levels by setting the priority level specification flag.
when multiple interrupts are to be used, clear the ID flag to ‘‘0’’ beforehand (for example, by placing the EI instruction
into the interrupt servicing program) to set the interrupt enabled mode.
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The V850/SA1 provides multiple interrupt servicing in which an interrupt is acknowledged while another interrupt is
There are two types of priority level control: control based on the default priority levels, and control based on the
Note that when an interrupt request is acknowledged, the ID flag of the PSW is automatically set to ‘‘1’’. Therefore,
Remark
xx: Identification name of each peripheral unit (refer to Table 5-2)
n:
For more information, refer to Table 5-1 Interrupt Source List.
Number of each peripheral unit (refer to Table 5-2)
CHAPTER 5 INTERRUPT/EXCEPTION PROCESSING FUNCTION
User’s Manual U12768EJ4V1UD
Programmable priority control