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Chapter 8
Interrupt/Exception Processing Function
Preliminary User’s Manual U15839EE1V0UM00
(2)
Restore
Recovery from an exception trap is carried out by the DBRET instruction. By executing the DBRET
instruction, the CPU carries out the following processing and controls the address of the restored
PC.
(1) Loads the restored PC and PSW from DBPC and DBPSW.
(2) Transfers control to the address indicated by the restored PC and PSW.
Figure 8-25 illustrates the restore processing from an exception trap.
Figure 8-25:
Restore Processing from Exception Trap
DBRET instruction
PC
PSW
DBPC
DBPSW
Jump to address of restored PC
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