93
Chapter 3
CPU Functions
User’s Manual U16580EE3V1UD00
(6)
Exception/debug trap status saving registers (DBPC, DBPSW)
There are two exception/debug trap status saving registers, DBPC and DBPSW.
Upon occurrence of an exception trap or debug trap, the contents of the program counter (PC) are
saved to DBPC, and the program status word (PSW) contents are saved to DBPSW.
The contents saved to DBPC consist of the address of the next instruction after the instruction
executed when an exception trap or debug trap occurs.
Bits 31 to 26 of DBPC and bits 31 to 8 of DBPSW are reserved (fixed to 0) for future function
expansion.
Figure 3-8:
Exception/Debug Trap Status Saving Registers (DBPC, DBPSW)
The values of DBPC and DBPSW are restored to PC and PSW during execution of the DBRET
instruction.
(7)
CALLT base pointer (CTBP)
The CALLT base pointer (CTBP) is used to specify CALLT table start address and generate target
addresses (bit 0 is fixed to 0).
Bits 31 to 26 are reserved (fixed to 0) for future function expansion.
Figure 3-9:
CALLT Base Pointer (CTBP)
31
26 25
0
After reset
0xxxxxxxH
(x: Undefined)
DBPC
0 0 0 0 0 0
(PC contents)
31
8 7
0
After reset
000000xxH
(x: Undefined)
DBPSW
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
(PSW contents)
31
26 25
1 0
After reset
0xxxxxxxH
(x: Undefined)
CTBP
0 0 0 0 0 0
(Base address)
0
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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