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Chapter 7
Interrupt/Exception Processing Function
User’s Manual U16580EE3V1UD00
7.4 Software
Exception
A software exception is generated when the CPU executes the TRAP instruction, and is always
accepted.
For details of the instruction function, refer to the
V850 Family User’s Manual Architecture.
7.4.1 Operation
If a software exception occurs, the CPU performs the following processing, and transfers control to the
handler routine:
<1> Saves the current PC to EIPC.
<2> Saves the current PSW to EIPSW.
<3> Writes an exception code to the lower 16 bits (EICC) of ECR (interrupt source).
<4> Sets the EP and ID bits of PSW.
<5> Loads the handler address (00000040H or 00000050H) of the software exception routine in the
PC, and transfers control.
The processing of a software exception is shown below.
Figure 7-19:
Software Exception Processing
Note:
TRAP instruction format: TRAP vector (the vector is a value from 0 to 1FH.)
The handler address is determined by the TRAP instruction’s operand (vector). If the vector is 0 to 0FH,
it becomes 00000040H, and if the vector is 10H to 1FH, it becomes 00000050H.
TRAP instruction
EIPC
EIPSW
ECR.EICC
PSW.EP
PSW.ID
PC
restored PC
PSW
exception code
1
1
handler address
CPU processing
Exception processing
Note
Summary of Contents for MuPD70F3187
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 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 ...
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