HD6432621 Hitachi, HD6432621 Datasheet - Page 135

• Manufacturer Part Number: HD6432621
• Description: (HD64F262x 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
I
1
1
CCR
UI
—
—
I2 to I0
—
—
EXR
T
—
0
91