4
4-19
Rev.1.0
EIT
4.9 Interrupt Handling
[EIT Processing]
(1) Saving the SM, IE, and C bits
The PSW Register SM, IE, and C bits are saved to the backup bits-BSM, BIE, and BC.
BSM
←
SM
BIE
←
IE
BC
←
C
(2) Updating the SM, IE, and C bits
The PSW Register SM, IE, and C bits are updated in the manner shown below.
SM
←
0
IE
←
0
C
←
0
(3) Saving the PC
The contents of the PC Register (always on word boundary) are saved to the BPC
Register.
(4) Branching to the EIT vector entry
Control branches to a user space address H'0000 0080. However, when in flash E/W
enable mode, control jumps to the beginning of the internal RAM (address H'0080 4000).
(For details, refer to Section 6.5, "Programming the Internal Flash Memory.") This is the
last operation in hardware preprocessing performed by the M32R/E.
(5) Branching from the EIT vector entry to the user-created handler
The M32R/E executes the BRA instruction written at the EIT vector entry address H'0000
0080 by the user, thereby branching to the start address of the user-created handler. At
the beginning of the user-created EIT handler, the BPC and PSW Registers and the
necessary general-purpose registers must first be saved to the stack.
(6) Returning from the EIT handler
At the end of the EIT handler, restore the general-purpose registers and the BPC and
PSW Registers from the stack and execute the RTE instruction. Then hardware
postprocessing will be performed automatically.
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 ...