Datasheet

V850ES/JG3 CHAPTER 19 INTERRUPT/EXCEPTION PROCESSING FUNCTION
R01UH0015EJ0300 Rev.3.00 Page 663 of 870
Sep 30, 2010
(2) Restoration
Restoration from a debug trap is executed with the DBRET instruction.
With the DBRET instruction, the CPU performs the following steps and transfers control to the address of the
restored PC.
<1> The restored PC and PSW are read from DBPC and DBPSW.
<2> Control is transferred to the fetched address of the restored PC and PSW.
Caution DBPC and DBPSW can be accessed only during the interval between the execution of the
DBTRAP instruction and the DBRET instruction.
The processing format for restoration from a debug trap is shown below.
Figure 19-14. Processing Format of Restoration from Debug Trap
DBRET instruction
PC
PSW
DBPC
DBPSW
Jump to address of restored PC