M32R

Microcontroller architecture

The M32R is a 32-bit RISC instruction set architecture (ISA) developed by Mitsubishi Electric for embedded microprocessors and microcontrollers. The ISA is now owned by Renesas Electronics Corporation, and the company designs and fabricates M32R implementations. M32R processors are used in embedded systems such as Engine Control Units, digital cameras and PDAs. The ISA was supported by Linux and the GNU Compiler Collection but was dropped in Linux kernel version 4.16.^[1]^[2] GCC removed support for this architecture in the GCC 12.1 release.^[3]

References

^ Simon Sharwood (3 April 2018). "Linux 4.16 arrives, erases eight CPUs and keeps melting Meltdown". theregister.co.uk. Situation Publishing. Archived from the original on 3 April 2018. Retrieved 3 April 2018.
^ "[GIT PULL] arch: remove obsolete architecture ports" . Retrieved 2024年02月20日.
^ GCC (15 Jun 2023). "GCC 12 Release Series: Changes, New Features, and Fixes". gcc.gnu.org. Situation Publishing. Archived from the original on 15 Jun 2023. Retrieved 15 Jun 2023.

v t e Reduced instruction set computer (RISC) architectures
Origins	IBM 801 Berkeley RISC Stanford MIPS
Development active	Analog Devices Blackfin ARC ARM AVR eSi-RISC LatticeMico8, LatticeMico32 MIPS OpenRISC Power ISA Renesas M32R, SuperH, V850 RISC-V SPARC Sunway Unicore Xilinx MicroBlaze, PicoBlaze
Development discontinued	Alpha AMD Am29000 Apollo PRISM Atmel AVR32 Clipper CR16 CRISP DEC PRISM Intel i860, i960 META MIPS-X Motorola 88000, M·CORE PA-RISC ROMP

Main

4-bit	Am2900 COP400 MARC4 PPS-4 S1C6x TLCS-47 TMS1000 μCOM-4
8-bit	6800 68HC05 68HC08 68HC11 S08 RS08 6502 65C134 65C265 MELPS 740 78K 8048 8051 XC800 AVR COP8 H8 PIC10/12/16/17/18 ST6/ST7 STM8 Z8 Z80 eZ80 Rabbit 2000 TLCS-870
16-bit	65C816 68HC12/16 80186 C166 CR16/C H8S MSP430 PIC24/dsPIC R8C RL78 TLCS-900 Z8000
32-bit	Am29000 ARC ARM Cortex-M EFM32 LPC SAM STM32 XMC ARM Cortex-R AVR32 CRX FR FR-V H8SX M32R MN103 68000 ColdFire PIC32 PowerPC MPC5xx Propeller SuperH TLCS-900 TriCore V850 RX Xtensa Z80000
64-bit	ARC ARM Cortex-R PowerPC64

Interfaces

Programming	In-circuit serial programming (ICSP) In-system programming (ISP) Program and Debug Interface (PDI) High-voltage serial programming (HVSP) High voltage parallel programming (HVPP) Bootloader ROM aWire
Debugging	Nexus (standard) Joint Test Action Group (JTAG) debugWIRE (Atmel) In-circuit debugging (ICD) In-circuit emulator (ICE) In-target probe (ITP)

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