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UPD17072 Datasheet(PDF) 71 Page - NEC

Part # UPD17072
Description  4-BIT SINGLE-CHIP MICROCONTROLLER WITH HARDWARE FOR DIGITAL TUNING SYSTEM
PDF  226 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD17072 Datasheet(HTML) 71 Page - NEC

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µPD17072,17073
71
11.3.2 Operations of interrupt stack
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
are necessary, therefore, they must be saved through program.
Figure 11-7. Operations of Interrupt Stack
Undefined
BANK1
Application
of VDD
Interrupt A
(BANK1)
RETI
Interrupt A
(BANK1)
Interrupt B
(BANK0)
RETI
RETI
(a) If interrupt level does not exceed 1
(b) If interrupt level exceeds 1
BANK1
BANK1
BANK0
BANK0
BANK0



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