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Encyclopedia > SuperH

The SuperHichem (or SH) is brandname of a certain microcontroller and microprocessor architecture. The SuperH is fundamentally a 32-bit load/store RISC architecture found in a large number of embedded systems. Image File history File links SuperH_logo. ... The integrated circuit from an Intel 8742, an 8-bit microcontroller that includes a CPU running at 12 MHz, 128 bytes of RAM, 2048 bytes of EPROM, and I/O in the same chip. ... A microprocessor (sometimes abbreviated µP) is a programmable digital electronic component that incorporates the functions of a central processing unit (CPU) on a single semiconducting integrated circuit (IC). ... The reduced instruction set computer, or RISC, is a microprocessor CPU design philosophy that favors a simpler set of instructions that all take about the same amount of time to execute. ... A router, an example of an embedded system. ...

Contents

History

The SuperH processor core family was first developed by Hitachi in the early 90's. Many microcontrollers and microprocessors were based on this architecture. It has been suggested that Hitachi Works be merged into this article or section. ...


Hitachi was developing a complete set of instruction set upward compatible CPU cores. Originally, the SH-1 and the SH-2 were used in the Sega Saturn and Sega 32X and then later in many other microcontrollers used in many other embedded applications. These cores use a 16-bit instruction set, though register length and data paths are 32-bit, which gave it an excellent code density. At the time, memory was very expensive. An instruction set, or instruction set architecture (ISA), describes the aspects of a computer architecture visible to a programmer, including the native datatypes, instructions, registers, addressing modes, memory architecture, interrupt and exception handling, and external I/O (if any). ... Die of an Intel 80486DX2 microprocessor (actual size: 12×6. ... The Sega Saturn ) is a 32-bit video game console, first released on November 22, 1994 in Japan, May 11, 1995 in North America and July 8, 1995 in Europe. ... This article or section does not cite its references or sources. ...


A few years later, the SH-3 core was added to this family of CPU cores extending the original cores mainly by another interrupt concept, a memory management unit (MMU) and a modified cache concept. The SH-3 core also got a DSP extension, then called SH-3-DSP core. With extended data paths for efficient DSP processing, special accumulators and a dedicated MAC-type DSP engine, this core was unifying the DSP and the RISC processor world. A derivative was also used with the original SH-2 core, then called SH-DSP. MMU, short for memory management unit, is a class of computer hardware components responsible for handling memory accesses requested by the CPU. Among the functions of such devices are the translation of virtual addresses to physical addresses (i. ... Digital signal processing (DSP) is the study of signals in a digital representation and the processing methods of these signals. ...


For the Sega Dreamcast, Hitachi was then developing the SH-4 architecture. This was a massive extension of the previous cores. Superscalar (2-way) instruction execution and a parallel vector floating point unit were the highlights of this architecture. This CPU core was then also used in many chipsets for embedded applications requiring a very high performance. SH-4 based standard chips were roughly introduced around 1998. The Dreamcast , code-named Dural, Dricas and Katana during development) is Segas fifth and final video game console and the successor to the Sega Saturn. ... It has been suggested that Hitachi Works be merged into this article or section. ... Simple superscalar pipeline. ... Parallel computing is the simultaneous execution of the same task (split up and specially adapted) on multiple processors in order to obtain results faster. ... A vector processor, or array processor, is a CPU design that is able to run mathematical operations on multiple data elements simultaneously. ... A floating point unit (FPU) is a part of a computer system specially designed to carry out operations on floating point numbers. ...


A bit later, Hitachi and ST Microelectronics formed the IP company SuperH, Inc which was going to license the SH-4 core to other companies and was developing the SH-5 architecture. The first move of SuperH into the 64-bit area. SuperH, Inc. sold the IP of these CPU cores. Hitachi may refer to: Hitachi (train) trains in Melbourne, Australia. ... Formerly SGS-Thomson, STMicroelectronics (abbreviated to ST in microchip designations) is a manufacturer of a wide variety of integrated circuits (ICs) and chipsets designed for GPS receivers, DBS receivers and DVD players, and biometric identification systems, among others. ... Patent holding companies are companies set up to administer and consolidate patents. ...


The SH-5 design supported two modes of operation. SHcompact mode is equivalent to the user-mode instructions of the SH-4 instruction set. SHmedia mode is very different, using 32-bit instructions with sixty-four 64-bit integer registers and SIMD instructions. In SHmedia mode the destination of a branch (jump) is loaded into a branch register separately from the actual branch instruction. This allows the processor to prefetch instructions for a branch without having to snoop the instruction stream. The combination of a compact 16-bit instruction encoding with a more powerful 32-bit instruction encoding is not unique to SH-5; recent ARM processors have a 16-bit Thumb mode, and MIPS processors have a MIPS-16 mode. However, SH-5 differs because its backward compatibility mode is the 16-bit encoding rather than the 32-bit encoding.-1... The ARM architecture (previously, the Advanced RISC Machine, and prior to that Acorn RISC Machine) is a 32-bit RISC processor architecture that is widely used in a number of embedded designs. ... A MIPS R4400 microprocessor made by Toshiba. ...


After that, the evolution of the SuperH architecture still continued. The latest evolutionary step happened around 2003 where the cores from SH-2 up to SH-4 were getting unified into a superscalar SH-X core which forms a kind of instruction set superset of the previous architectures.


Today, the SuperH CPU cores, architecture and products are with Renesas Technology, a merger of the Hitachi and Mitsubishi semiconductor groups. See further details under Renesas. Renesas Technology Corporation ) is a Japanese semiconductor manufacturer. ...


Models

The family of SuperH CPU cores include:

  • SH-1 - used in microcontrollers for deeply embedded applications (CD-ROM drives, major appliances, etc)
  • SH-2 - used in microcontrollers with higher performance requirements, also used in automotive such as engine control units or in networking applications
  • SH-DSP - initially developed for the mobile phone market, used later in many consumer applications requiring DSP performance for JPEG compression etc
  • SH-3 - used for mobile and handheld applications, strong in Windows CE applications and market for many years in the car navigation market
  • SH-3-DSP - used mainly in multimedia terminals and networking applications, also in printers and fax machines
  • SH-4 - used whenever high performance is required such as car multimedia terminals, video game consoles, or set-top boxes
  • SH-5 - used in high-end multimedia applications
  • SH-X - mainstream core used in various flavours (with/without DSP or FPU unit) in engine control unit, car multimedia equipment, set-top boxes or mobile phones
  • SH-Mobile - SuperH Mobile Application Processor; designed to offload application processing from the baseband LSI, this is a solution to ease system development and realise significant performance improvement.


The SuperH cores are supported worldwide by many RTOS and tool vendors. The CD-ROM (an abbreviation for Compact Disc Read-Only Memory (ROM)) is a non-volatile optical data storage medium using the same physical format as audio compact discs, readable by a computer with a CD-ROM drive. ... A major appliance is a large machine which accomplishes some routine housekeeping task, which includes purposes such as cooking, food preservation, or cleaning, whether in a household, institutional, commercial or industrial setting. ... An Engine Control Unit (ECU) also know as Engine Management System (EMS) is an electronic system which controls various aspects of an internal combustion engines operation. ... In computing, JPEG (pronounced JAY-peg; IPA: ) is a commonly used standard method of compression for photographic images. ... video game consoles A video game console is an interactive entertainment computer. ... The term set-top box (STB) describes a device that connects to a television and some external source of signal, and turns the signal into content then displayed on the screen. ... A real-time operating system (RTOS) is a class of operating system intended for real-time applications. ...


Distinctions

  • Scalability
  • Cost efficient
  • Optimised for embedded applications
  • High performance

See Also

Debuggers

An editor has expressed a concern that the subject of the article does not satisfy the notability guideline or one of the following guidelines for inclusion on Wikipedia: Biographies, Books, Companies, Fiction, Music, Neologisms, Numbers, Web content, or several proposals for new guidelines. ...

RTOS

A Real Time Operating System or RTOS is an operating system that has been developed for real-time applications. ... eCos (embedded Configurable operating system) is an open source, royalty-free, real-time operating system intended for embedded systems and applications which need only one process. ... RTEMS (Real-Time Executive for Multiprocessor Systems) is a free open source real-time operating system designed for embedded systems. ...

External links

  • Renesas SuperH - Products, Tools, Manuals, App.Notes, Information

Linux for SuperH

Linux distributions for SuperH It has been suggested that Linux be merged into this article or section. ...

NetBSD on SuperHichem Jornada Linux Mobility Edition (Jlime for short) is a Linux distribution aimed for the HP Jornada platform . ... The Hewlett-Packard Company (NYSE: HPQ), commonly known as HP, is a very large, global company headquartered in Palo Alto, California, United States. ... The Gentoo Linux operating system (pronounced ) is a Linux distribution named after the Gentoo penguin. ... T2 is a flexible Open Source System Development Environment (SDE) that allows the automated creation of Operating System with bleeding edge technology. ... NetBSD is a freely redistributable, open source version of the Unix-like BSD computer operating system. ...

OpenBSD on SuperH OpenBSD is a freely available Unix-like computer operating system descended from Berkeley Software Distribution (BSD), a Unix derivative developed at the University of California, Berkeley. ...

v  d  e
RISC
Power Architecture · ARM architecture · DEC Alpha · Atmel AVR · MIPS architecture · PA-RISC · Parallax Propeller · PIC microcontroller · SPARC · SuperH · XAP processor · I960 · Motorola 88000

  Results from FactBites:
 
SuperH - Wikipedia, the free encyclopedia (293 words)
The SuperH (or SH) is a microprocessor architecture.
The SuperH core is RISC based and found in a large number of embedded systems.
The SuperH family was first developed by Hitachi as the successor to the H8 Family and the design was outsourced to the newly-formed SuperH Inc., owned by Hitachi and ST Microelectronics.
redhat.com | Red Hat and SuperH Develop Open Source Tools for New 64 Bit Processors (958 words)
The SuperH architecture, including the new 64 bit SH-5 core architecture, will be supported by the Red Hat Embedded Linux developer suite enabling developers to gain access to the latest software upgrades as they become available and to Red Hat Open Source Support.
Currently SuperH, Inc is seeking partners to license its high-performance, low-cost, power efficient SH-4 core, which is targeted at the next generation PDA market, the set-top-box sector, the games console sector and the automotive sector.
Looking to the future SuperH, Inc. will develop all subsequent SuperH cores to the open market, including the development of the soon to be launched 64-bit SH-5 processor as well as future SH-6 and SH-7 cores, due to be unveiled over the next two years.
  More results at FactBites »

 
 

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