UPD17073 NEC, UPD17073 Datasheet - Page 71

• Manufacturer Part Number: UPD17073
• Description: 4-BIT SINGLE-CHIP MICROCONTROLLER WITH HARDWARE FOR DIGITAL TUNING SYSTEM
• Manufacturer: NEC

11.3.2 Operations of interrupt stack
are necessary, therefore, they must be saved through program.
Figure 11-7 illustrates the operations of the interrupt stack.
When multiplexed interrupts have been accepted, the first contents saved to the stack are popped. If these contents
(a) If interrupt level does not exceed 1
(b) If interrupt level exceeds 1
Application
Interrupt A
(BANK1)
of V
DD
Undefined
BANK1
Figure 11-7. Operations of Interrupt Stack
Interrupt A
Interrupt B
(BANK1)
(BANK0)
BANK1
BANK0
RETI
RETI
BANK1
BANK0
RETI
BANK0
PD17072,17073
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