Appendix 2
INSTRUCTION PROCESSING TIME
Appendix 2.1 M32R/E Instruction Processing Time
Appendix 2-3
Rev.1.0
The following shows the number of memory access cycles in IF and MEM stages. Shown here are
the minimum number of cycles required for memory access. Therefore, these values do not always
reflect the number of cycles required for actual memory or bus access.
In write access, for example, although the CPU finishes the MEM stage by only writing to the write
buffer, this operation actually is followed by a write to memory. Depending on the memory or bus
state before or after the CPU requested a memory access, the instruction processing may take
more time than the calculated value.
■
R (read cycle)
Cycles
When existing in instruction queue ............................................................................. 1
When reading internal resource (ROM, RAM) ............................................................ 1
When reading internal resource (SFR)(byte, halfword) .............................................. 2
When reading internal resource (SFR)(word) ............................................................. 4
When reading external memory (byte, halfword) ........................................................ 5 (Note)
When reading external memory (word) ....................................................................... 9 (Note)
When successively fetching instructions from external memory ................................. 8 (Note)
■
W (write cycle)
Cycles
When writing to internal resource (RAM) .................................................................... 1
When writing to internal resource (SFR)(byte, halfword) ............................................ 2
When writing to internal resource (SFR)(word) ........................................................... 4
When writing to external memory (byte, halfword) ...................................................... 4 (Note)
When writing to external memory (word) .................................................................... 8 (Note)
Note: This applies for external access with one wait cycle. (When the 32171 accesses external
circuits, it requires at least one wait cycle inserted.)
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 ...