NEC V850E/Dx3 Preliminary User's Manual page 223

Interrupt Controller (INTC)
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Figure 5-12 Exception trap processing
(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 5-13 illustrates the restore processing from an exception trap.
Figure 5-13 Restore processing from exception trap
Preliminary User's Manual U17566EE1V2UM00
Exception trap (ILGOP) occurs
DBPC
DBPSW
PSW.NP
PSW.EP
CPU processing
PSW.ID
PC
Exception processing
DBRET instruction
PC DBPC
PSW DBPSW
Jump to address of restored PC
Chapter 5
restored PC
PSW
1
1
1
00000060H
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