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User’s Manual U11969EJ3V0UM00
109
CHAPTER 5 INTERRUPT/EXCEPTION PROCESSING FUNCTION
5.3.1 Operation
If a maskable interrupt occurs, the CPU performs the following processing, and transfers control to a handler routine:
(1) Saves the restored PC to EIPC.
(2) Saves the current PSW to EIPSW.
(3) Writes an exception code to the lower half-word of ECR (EICC).
(4) Sets the ID bit of PSW and clears the EP bit.
(5) Loads the corresponding handler address to the PC, and transfers control.
Figure 5-5 illustrates how the maskable interrupts are processed.
Содержание V854 UPD703006
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