HD6432646 Hitachi, HD6432646 Datasheet - Page 131

• Manufacturer Part Number: HD6432646
• Description: (HD64F264x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

4.5
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 4-4 shows the status of CCR and EXR after execution of trap instruction exception
handling.
Table 4-4
Interrupt Control Mode
0
2
Legend
1: Set to 1
0: Cleared to 0
—: Retains value prior to execution.
Trap Instruction
Status of CCR and EXR after Trap Instruction Exception Handling
1
1
I
CCR
UI
—
—
I2 to I0
—
—
EXR
—
T
0
97