UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 558

• Manufacturer Part Number: UPD784026
• Description: 16/8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

20.7 MASKABLE INTERRUPT ACKNOWLEDGMENT OPERATION
is cleared (0). When processing is performed by macro service, the interrupt is acknowledged and processed by macro
service immediately. In the case of vectored interrupt and context switching, an interrupt is acknowledged in the interrupt
enabled state (when the IE flag is set (1)) if the priority of that interrupt is one for which acknowledgment is permitted.
the priority specification flag is acknowledged. If the interrupts have the same priority specified, they are acknowledged
in accordance with their default priorities.
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A maskable interrupt can be acknowledged when the interrupt request flag is set (1) and the mask flag for that interrupt
If maskable interrupt requests are generated simultaneously, the interrupt for which the highest priority is specified by
A pending interrupt is acknowledged when a state in which it can be acknowledged is established.
The interrupt acknowledgment algorithm is shown in Figure 20-10.
CHAPTER 20 INTERRUPT FUNCTIONS