UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 572

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

20.8.4 Operation at End of Macro Service
service ends when the processing has been performed the specified number of times (when the macro service counter
(MSC) reaches 0). Either of two operations may be performed at this point, as specified by the VCIE bit (bit 7) of the macro
service mode register for each macro service.
(1) When VCIE bit is 0
532
In macro service, processing is performed the number of times specified during execution of another program. Macro
In this mode, an interrupt is generated as soon as the macro service ends. Figure 20-18 shows an example of macro
service and interrupt acknowledgment operations when the VCIE bit is 0.
This mode is used when a series of operations end with the last macro service processing performed, for instance.
It is mainly used in the following cases:
• Asynchronous serial interface receive data buffering (INTSR/INTSR2)
• A/D conversion result fetch (INTAD)
• Compare register update as the result of a match between a timer register and the compare register (INTC00/
• Timer/counter capture register read due to edge input to the INTPn pin (INTP0/INTP1/INTP2/INTP3)
INTC01/INTC10/INTC11/INTC20/INTC21/INTC30)
CHAPTER 20 INTERRUPT FUNCTIONS