252
Chapter 7
Interrupt/Exception Processing Function
User’s Manual U16580EE3V1UD00
7.5 Exception
Trap
An exception trap is an interrupt that is requested when the illegal execution of an instruction takes
place. In the V850E/PH2, an illegal opcode trap (ILGOP: Illegal Opcode Trap) is considered as an
exception trap.
7.5.1 Illegal opcode definition
The illegal instruction has an opcode (bits 10 to 5) of 111111B, a sub-opcode (bits 26 to 23) of 1000B to
1111B, and a sub-opcode (bit 16) of 0B. An exception trap is generated when an instruction applicable
to this illegal instruction is executed.
Figure 7-22:
Illegal Opcode
Caution:
Caution Since it is possible that this instruction may be assigned to an illegal opcode
in the future, it is recommended that it not be used.
Remark:
x: don’t care
(1)
Operation
If an exception trap occurs, the CPU performs the following processing, and transfers control to
the handler routine.
<1> Saves the restored PC to DBPC.
<2> Saves the current PSW to DBPSW.
<3> Sets the PSW.NP, PSW.EP, and PSW.ID bits.
<4> Sets the handler address (00000060H) corresponding to the exception trap to the PC, and
transfers control.
Figure 7-23 illustrates the processing of the exception trap.
15
16
23 22
× × × × × ×
0
×
×
×
×
×
×
×
×
×
×
1
1
1
1
1
1
×
×
×
×
×
27 26
31
0
4
5
10
11
0
1
0
1
0
1
1
1
to
Summary of Contents for V850E/PH2
Page 6: ...6 Preface User s Manual U16580EE3V1UD00...
Page 16: ...16 User s Manual U16580EE3V1UD00...
Page 28: ...28 User s Manual U16580EE3V1UD00...
Page 32: ...32 User s Manual U16580EE3V1UD00...
Page 84: ...84 Chapter 2 Pin Functions User s Manual U16580EE3V1UD00 MEMO...
Page 144: ...144 Chapter 3 CPU Functions User s Manual U16580EE3V1UD00 MEMO...
Page 192: ...192 Chapter 5 Memory Access Control Function PD70F3187 only User s Manual U16580EE3V1UD00 MEMO...
Page 312: ...312 Chapter 9 16 Bit Timer Event Counter P User s Manual U16580EE3V1UD00 MEMO...
Page 534: ...534 Chapter 11 16 bit Timer Event Counter T User s Manual U16580EE3V1UD00...
Page 969: ...969 Chapter 20 Port Functions User s Manual U16580EE3V1UD00 MEMO...
Page 970: ...970 Chapter 20 Port Functions User s Manual U16580EE3V1UD00...
Page 976: ...976 Chapter 22 Internal RAM Parity Check Function User s Manual U16580EE3V1UD00 MEMO...
Page 984: ...984 Chapter 23 On Chip Debug Function OCD User s Manual U16580EE3V1UD00 MEMO...
Page 1006: ...1006 Chapter 24 Flash Memory User s Manual U16580EE3V1UD00 MEMO...
Page 1036: ...1036 Chapter 27 Recommended Soldering Conditions User s Manual U16580EE3V1UD00 MEMO...
Page 1046: ...1046 Appendix A Index User s Manual U16580EE3V1UD00 MEMO...
Page 1052: ...1052 User s Manual U16580EE3V1UD00...
Page 1053: ......