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Rev.1.0
1.1 Overview
1.1.1 M32R Family CPU Core
(1) Uses the RISC architecture
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The 32172/32173 are 32-bit, RISC single-chip microcomputers built around the M32R family
CPU core (hereafter referred to as the "M32R") and incorporating flash memory, RAM, and
various other peripheral functions... all integrated into a single chip.
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The M32R uses the RISC architecture. Memory accesses are performed using Load and Store
instructions, and various arithmetic operations are executed using register-to-register
operating instructions. The M32R internally has sixteen 32-bit general-purpose registers and a
total of 83 discrete instructions.
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In addition to Load and Store instructions, the M32R supports compound instructions such as
Load & Address Update and Store & Address Update. These instructions are useful for
speeding up data transfers.
(2) 5-stage pipelined processing
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The M32R uses 5-stage pipelined instruction processing consisting of Instruction Fetch,
Decode, Execute, Memory Access, and Write Back. Not just load and store instructions or
register-to-register operation instructions, compound instructions such as Load & Address
Update and Store & Address Update also are executed in one cycle.
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Instructions are entered into the execution stage in the order they are fetched, but this does not
always mean that the first instruction entered is executed first. If the execution of a load or store
instruction entered earlier is delayed by one or more wait cycles inserted in memory access, a
register-to-register operation instruction entered later may be executed before said load or
store instruction. By using "out-of-order-completion" like this, the M32R controls instruction
execution without wasting clock cycles.
(3) Compact instruction code
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Instructions of the M32R come in either a 16-bit instruction or a 32-bit instruction format. Use of
the 16-bit instruction format especially helps to reduce the code size of a program.
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Some 32-bit instructions can branch directly to a location 32 Mbytes forward or backward from
the currently executed instruction address. The availability of such instructions makes
programming easier than for architectures with segmented address spaces.
Overview
1.1 Overview
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 ...