Datasheet

Section 4 Exception Handling
Rev. 4.00 Sep 27, 2006 page 110 of 1130
REJ09B0327-0400
4.4 Trap Instruction
Trap instruction exception handling starts when a TRAPA instruction is executed. Trap instruction
exception handling can be executed at all times in the program execution state.
The TRAPA instruction fetches a start address from a vector table entry corresponding to a vector
number from 0 to 3, as specified in the instruction code.
Table 4.3 shows the status of CCR and EXR after execution of trap instruction exception handling.
Table 4.3 Status of CCR and EXR after Trap Instruction Exception Handling
CCR EXR
Interrupt Control Mode I UI I2 to I0 T
01———
111——
Legend:
1: Set to 1
0: Cleared to 0
—: Retains value prior to execution.