UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 573

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

Last Macro Service Request
Other Interrupt Request
Macro Service Request
Figure 20-18 Operation at End of Macro Service When VCIE = 0
Main Routine
Main Routine
EI
EI
Last Macro
Service Request
CHAPTER 20 INTERRUPT FUNCTIONS
Processing of Other Interrupt
Processing of Interrupt Request
due to End of Macro Service
Macro Service Processing
Macro Service Processing
Processing of Interrupt Request
due to End of Macro Service
Macro Service Processing
At the end of macro service
(MSC = 0), an interrupt
request is generated and
acknowledged.
If the last macro service is
performed when the
interrupt due to the end of
macro service cannot be
acknowledged while other
interrupt processing is being
executed, etc., that interrupt
is held pending until it can
be acknowledged.
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