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Chapter 5
Interrupt Controller (INTC)
Preliminary User’s Manual U17566EE1V2UM00
(1)
Acknowledgment of maskable interrupts in service program
Service program of maskable interrupt or exception
(2)
Generation of exception in service program
Service program of maskable interrupt or exception
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• EIPC saved to memory or register
• EIPSW saved to memory or register
• EI instruction (interrupt acknowledgment enabled)
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Higher priority maskable interrupt
acknowledgment
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• DI instruction (interrupt acknowledgment disabled)
• Saved value restored to EIPSW
• Saved value restored to EIPC
• RETI instruction
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• EIPC saved to memory or register
• EIPSW saved to memory or register
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• TRAP instruction
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TRAP/exception acknowledgment
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• Saved value restored to EIPSW
• Saved value restored to EIPC
• RETI instruction
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