2
2-5
Rev.1.0
CPU
2.3 Control Registers
2.3.2 Condition Bit Register: CBR (CR1)
The Condition Bit Register (CBR) is created as a separate register from the PSW by extracting the
Condition bit (C) from it. The value written to the PSW C bit is reflected in this register. This register
is a read-only register (writes to this register by "MVTC" instruction are ignored).
2.3.3 Interrupt Stack Pointer: SPI (CR2)
User Stack Pointer: SPU (CR3)
The Interrupt Stack Pointer (SPI) and User Stack Pointer (SPU) hold the current address of the
stack pointer. These registers can be accessed as general-purpose register R15. In this case,
whether R15 is used as SPI or as SPU depends on the PSW's Stack Mode (SM) bit.
2.3.4 Backup PC: BPC (CR6)
The Backup PC (BPC) is a register used to save the value of the Program Counter (PC) when an
EIT occurs. Bit 31 is fixed to 0.
When an EIT occurs, the value held in the PC immediately before the EIT occurred or the value of
the next instruction is set in this register. When the "RTE" instruction is executed, the saved value
is returned from the BPC to the PC. However, the two low-order bits of the PC when thus returned
are always fixed to "00" (control always returns to word boundaries.)
BPC
BPC
0
31(LSB)
0(MSB)
SPI
SPI
SPU
SPU
0(MSB)
0(MSB)
31(LSB)
31(LSB)
CBR
0(MSB)
31(LSB)
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 C
Содержание 32172
Страница 20: ... This is a blank page 16 ...
Страница 21: ...1 1 Overview 1 2 Block Diagram 1 3 Pin Functions 1 4 Pin Layout CHAPTER 1 CHAPTER 1 OVERVIEW ...
Страница 44: ...1 1 24 Rev 1 0 This is a blank page Overview 1 4 Pin Layout ...
Страница 58: ...2 2 14 Rev 1 0 This is a blank page CPU 2 6 Data Formats ...
Страница 122: ...4 4 26 Rev 1 0 This is a blank page EIT 4 13 Precautions on EIT ...
Страница 200: ...7 7 6 Rev 1 0 This is a blank page RESET 7 4 Precautions to Be Taken Immediately after Reset ...
Страница 240: ...8 8 40 Rev 1 0 This is a blank page INPUT OUTPUT PORTS AND PIN FUNCTIONS 8 5 Precautions on Input Output Ports ...
Страница 298: ...9 9 58 Rev 1 0 This is a blank page DMAC 9 4 Precautions on Using DMAC ...
Страница 416: ...10 10 118 Rev 1 0 This is a blank page INPUT OUTPUT TIMERS 10 6 TOM Output Related 16 bit Timers ...
Страница 658: ...14 14 16 Rev 1 0 REAL TIME DEBUGGER RTD 14 4 Typical Connection with the Host This is a blank page ...
Страница 718: ...16 16 16 Rev 1 0 This is a blank page D A CONVERTERS 16 3 Functional Description of the D A Converters ...
Страница 766: ...18 18 22 Rev 1 0 WAIT CONTROLLER 18 3 Typical Operation of the Wait Controller This is a blank page ...
Страница 776: ...19 19 10 Rev 1 0 RAM BACKUP MODE 19 4 Exiting RAM Backup Mode Wakeup This is a blank page ...
Страница 777: ...CHAPTER 20 CHAPTER 20 OSCILLATION CIRCUIT 20 1 Oscillator Circuit 20 2 Clock Generator Circuit ...
Страница 782: ...20 20 6 Rev 1 0 OSCILLATION CIRCUIT 20 2 Clock Generator Circuit This is a blank page ...
Страница 856: ...23 23 26 Rev 1 0 This is a blank page ELECTRICAL CHARACTERISTICS 23 6 AC Characteristics ...
Страница 857: ...24 1 A D Conversion Characteristics CHAPTER 24 CHAPTER 24 STANDARD CHARACTERISTICS ...
Страница 859: ...Appendix 1 1 Dimensional Outline Drawing APPENDIX 1 APPENDIX 1 MECHANICAL SPECIFICATIONS ...
Страница 861: ...Appendix 2 1 M32R E Instruction Processing Time APPENDIX 2 APPENDIX 2 INSTRUCTION PROCESSING TIME ...
Страница 865: ...Appendix 3 1 Precautions about Noise APPENDIX 3 APPENDIX 3 PRECAUTIONS ABOUT NOISE ...