ARM7

Last updated

ARM7
General information
Designed by ARM Holdings
Architecture and classification
Instruction set ARM (32-bit) (ARMv3)
ARM7T
Architecture and classification
Instruction set ARM (32-bit),
Thumb (16-bit) (ARMv4T)
ARM7EJ-S
Mobiwire N169-20 N1 - board - Mediatek MT6261MA-6571.jpg
Architecture and classification
Instruction set ARM (32-bit),
Thumb (16-bit),
Jazelle (8-bit) (ARMv5TEJ)

ARM7 is a group of 32-bit RISC ARM processor cores licensed by ARM Holdings for microcontroller use. [1] The ARM7 core family consists of ARM700, ARM710, ARM7DI, ARM710a, ARM720T, ARM740T, ARM710T, ARM7TDMI, ARM7TDMI-S, ARM7EJ-S. The ARM7TDMI and ARM7TDMI-S were the most popular cores of the family.

Contents

ARM7 cores were released from 1993 to 2001. [1]

Overview

This generation introduced the Thumb 16-bit instruction set providing improved code density compared to previous designs. The most widely used ARM7 designs implement the ARMv4T architecture, but some implement ARMv3 or ARMv5TEJ. ARM7TDMI has 37 registers (31 GPR and 6 SPR). All these designs use a Von Neumann architecture,[ citation needed ] thus the few versions containing a cache do not separate data and instruction caches.

Some ARM7 cores are obsolete. One historically significant model, the ARM7DI [2] is notable for having introduced JTAG based on-chip debugging; the preceding ARM6 cores did not support it. The "D" represented a JTAG TAP for debugging; the "I" denoted an ICEBreaker debug module supporting hardware breakpoints and watchpoints, and letting the system be stalled for debugging. Subsequent cores included and enhanced this support.

It is a versatile processor designed for mobile devices and other low power electronics. This processor architecture is capable of up to 130 MIPS on a typical 0.13 μm process. The ARM7TDMI processor core implements ARM architecture v4T. The processor supports both 32-bit and 16-bit instructions via the ARM and Thumb instruction sets.

ARM licenses the processor to various semiconductor companies, which design full chips based on the ARM processor architecture.

ARM license

ARM Holdings neither manufactures nor sells CPU devices based on its own designs, but rather licenses the processor architecture to interested parties. ARM offers a variety of licensing terms, varying in cost and deliverables. To all licensees, ARM provides an integratable hardware description of the ARM core, as well as complete software development toolset and the right to sell manufactured silicon containing the ARM CPU.

Silicon customization

Integrated device manufacturers (IDM) receive the ARM Processor IP as synthesizable RTL (written in Verilog). In this form, they have the ability to perform architectural level optimizations and extensions. This allows the manufacturer to achieve custom design goals, such as higher clock speed, very low power consumption, instruction set extensions, optimizations for size, debug support, etc. To determine which components have been included in a particular ARM CPU chip, consult the manufacturer datasheet and related documentation.

Cores

YearARM7 Cores
1993ARM700
1994ARM710
1994ARM7DI
1994ARM7TDMI
1995ARM710a
1997ARM710T
1997ARM720T
1997ARM740T
2001ARM7TDMI-S
2001ARM7EJ-S

The original ARM7 was based on the earlier ARM6 design and used the same ARMv3 instruction set. The ARM710 variant was used in a CPU module for the Acorn Risc PC, and the first ARM based System on a Chip designs ARM7100 and ARM7500 used this core.

ARM7TDMI

The ARM7TDMI (ARM7 + 16 bit Thumb + JTAG Debug + fast Multiplier + enhanced ICE) processor implements the ARMv4 instruction set. It was licensed for manufacture by an array of semiconductor companies. In 2009, it was one of the most widely used ARM cores, and is found in numerous deeply embedded system designs. It was used in the popular video game console Game Boy Advance.

Texas Instruments licensed the ARM7TDMI, which was designed into the Nokia 6110, the first ARM-powered GSM phone. [3] This led to the popular series of Nokia phones using the processor, including the 3210 and 3310. [4]

The ARM7TDMI-S variant is the synthesizable core.

ARM7EJ-S

MediaTek MT3337V - ARM7EJ-S processor ITracker mini0806-S - GPS antenna - MTK MT3337V-0384.jpg
MediaTek MT3337V – ARM7EJ-S processor

The ARM7EJ-S (ARM7 + Enhanced + Jazelle - Synthesizable) is a version of the ARM7 implementing the ARMv5TE instruction set originally introduced with the more powerful ARM9E core.

Chips

Yamaha AICA sound processor in Dreamcast game console NAOMI Yamaha AICA Super Intelligent Sound Processor.jpg
Yamaha AICA sound processor in Dreamcast game console

ARM7TDMI or ARM7TDMI-S core

Unreferenced ARM7 core

The Make Controller Kit with an Atmel AT91SAM7X256 (ARM) microcontroller Mck glamor 320.jpg
The Make Controller Kit with an Atmel AT91SAM7X256 (ARM) microcontroller

Notable uses

See also

Related Research Articles

<span class="mw-page-title-main">Microcontroller</span> Small computer on a single integrated circuit

A microcontroller or microcontroller unit (MCU) is a small computer on a single integrated circuit. A microcontroller contains one or more CPUs along with memory and programmable input/output peripherals. Program memory in the form of NOR flash, OTP ROM, or ferroelectric RAM is also often included on the chip, as well as a small amount of RAM. Microcontrollers are designed for embedded applications, in contrast to the microprocessors used in personal computers or other general-purpose applications consisting of various discrete chips.

ARM is a family of RISC instruction set architectures (ISAs) for computer processors. Arm Holdings develops the ISAs and licenses them to other companies, who build the physical devices that use the instruction set. It also designs and licenses cores that implement these ISAs.

<span class="mw-page-title-main">AVR microcontrollers</span> Family of microcontrollers

AVR is a family of microcontrollers developed since 1996 by Atmel, acquired by Microchip Technology in 2016. These are modified Harvard architecture 8-bit RISC single-chip microcontrollers. AVR was one of the first microcontroller families to use on-chip flash memory for program storage, as opposed to one-time programmable ROM, EPROM, or EEPROM used by other microcontrollers at the time.

SuperH is a 32-bit reduced instruction set computing (RISC) instruction set architecture (ISA) developed by Hitachi and currently produced by Renesas. It is implemented by microcontrollers and microprocessors for embedded systems.

JTAG is an industry standard for verifying designs of and testing printed circuit boards after manufacture.

<span class="mw-page-title-main">TMS320</span> Series of Digital Signal Processor chips

TMS320 is a blanket name for a series of digital signal processors (DSPs) from Texas Instruments. It was introduced on April 8, 1983, through the TMS32010 processor, which was then the fastest DSP on the market.

Atmel ARM-based processors are microcontrollers and microprocessors integrated circuits, by Microchip Technology, that are based on various 32-bit ARM processor cores, with in-house designed peripherals and tool support.

<span class="mw-page-title-main">AVR32</span>

AVR32 is a 32-bit RISC microcontroller architecture produced by Atmel. The microcontroller architecture was designed by a handful of people educated at the Norwegian University of Science and Technology, including lead designer Øyvind Strøm and CPU architect Erik Renno in Atmel's Norwegian design center.

ARM9 is a group of 32-bit RISC ARM processor cores licensed by ARM Holdings for microcontroller use. The ARM9 core family consists of ARM9TDMI, ARM940T, ARM9E-S, ARM966E-S, ARM920T, ARM922T, ARM946E-S, ARM9EJ-S, ARM926EJ-S, ARM968E-S, ARM996HS. ARM9 cores were released from 1998 to 2006 and they are no longer recommended for new IC designs; recommended alternatives include ARM Cortex-A, ARM Cortex-M, and ARM Cortex-R cores.

ARM11 is a group of 32-bit RISC ARM processor cores licensed by ARM Holdings. The ARM11 core family consists of ARM1136J(F)-S, ARM1156T2(F)-S, ARM1176JZ(F)-S, and ARM11MPCore. Since ARM11 cores were released from 2002 to 2005, they are no longer recommended for new IC designs, instead ARM Cortex-A and ARM Cortex-R cores are preferred.

<span class="mw-page-title-main">Segger Microcontroller Systems</span> Private company in the embedded systems industry

Segger Microcontroller is a private company involved in the embedded systems industry. It provides products used to develop and manufacture four categories of embedded systems: real-time operating systems (RTOS) and software libraries (middleware), debugging and trace probes, programming tools, and in-system programmers. The company is headquartered in Monheim am Rhein, Germany, with remote offices in Gardner, Massachusetts; Milpitas, California; and Shanghai, China.

<span class="mw-page-title-main">ARM Cortex-M</span> Group of 32-bit RISC processor cores

The ARM Cortex-M is a group of 32-bit RISC ARM processor cores licensed by ARM Limited. These cores are optimized for low-cost and energy-efficient integrated circuits, which have been embedded in tens of billions of consumer devices. Though they are most often the main component of microcontroller chips, sometimes they are embedded inside other types of chips too. The Cortex-M family consists of Cortex-M0, Cortex-M0+, Cortex-M1, Cortex-M3, Cortex-M4, Cortex-M7, Cortex-M23, Cortex-M33, Cortex-M35P, Cortex-M52, Cortex-M55, Cortex-M85. A floating-point unit (FPU) option is available for Cortex-M4 / M7 / M33 / M35P / M52 / M55 / M85 cores, and when included in the silicon these cores are sometimes known as "Cortex-MxF", where 'x' is the core variant.

The ARM Cortex-A is a group of 32-bit and 64-bit RISC ARM processor cores licensed by Arm Holdings. The cores are intended for application use. The group consists of 32-bit only cores: ARM Cortex-A5, ARM Cortex-A7, ARM Cortex-A8, ARM Cortex-A9, ARM Cortex-A12, ARM Cortex-A15, ARM Cortex-A17 MPCore, and ARM Cortex-A32, 32/64-bit mixed operation cores: ARM Cortex-A35, ARM Cortex-A53, ARM Cortex-A55, ARM Cortex-A57, ARM Cortex-A72, ARM Cortex-A73, ARM Cortex-A75, ARM Cortex-A76, ARM Cortex-A77, ARM Cortex-A78, ARM Cortex-A710, and ARM Cortex-A510 Refresh, and 64-bit only cores: ARM Cortex-A34, ARM Cortex-A65, ARM Cortex-A510 (2021), ARM Cortex-A715, ARM Cortex-A520, and ARM Cortex-A720.

<span class="mw-page-title-main">STM32</span> ARM Cortex-M based Microcontrollers by STMicroelectronics

STM32 is a family of 32-bit microcontroller integrated circuits by STMicroelectronics. The STM32 chips are grouped into related series that are based around the same 32-bit ARM processor core: Cortex-M0, Cortex-M0+, Cortex-M3, Cortex-M4, Cortex-M7, Cortex-M33. Internally, each microcontroller consists of ARM processor core(s), flash memory, static RAM, debugging interface, and various peripherals.

<span class="mw-page-title-main">ARM Cortex-R</span> Family of microprocessor cores with ARM microarchitecture

The ARM Cortex-R is a family of 32-bit and 64-bit RISC ARM processor cores licensed by Arm Ltd. The cores are optimized for hard real-time and safety-critical applications. Cores in this family implement the ARM Real-time (R) profile, which is one of three architecture profiles, the other two being the Application (A) profile implemented by the Cortex-A family and the Microcontroller (M) profile implemented by the Cortex-M family. The ARM Cortex-R family of microprocessors currently consists of ARM Cortex-R4(F), ARM Cortex-R5(F), ARM Cortex-R7(F), ARM Cortex-R8(F), ARM Cortex-R52(F), ARM Cortex-R52+(F), and ARM Cortex-R82(F).

The ARM Cortex-A5 is a 32-bit processor core licensed by ARM Holdings implementing the ARMv7-A architecture announced in 2009.

<span class="mw-page-title-main">NXP LPC</span> Family of 32-bit microcontroller integrated circuits

LPC is a family of 32-bit microcontroller integrated circuits by NXP Semiconductors. The LPC chips are grouped into related series that are based around the same 32-bit ARM processor core, such as the Cortex-M4F, Cortex-M3, Cortex-M0+, or Cortex-M0. Internally, each microcontroller consists of the processor core, static RAM memory, flash memory, debugging interface, and various peripherals. The earliest LPC series were based on the Intel 8-bit 80C51 core. As of February 2011, NXP had shipped over one billion ARM processor-based chips.

David Jaggar is a computer scientist who was responsible for the development of the ARM architecture between 1992 and 2000, redefining it from a low-cost workstation processor to the dominant embedded system processor.

References

  1. 1 2 ARM7 Family Webpage; ARM Holdings.
  2. ↑ "ARM7DI Data Sheet"; Document Number ARM DDI 0027D; Issued: December 1994.
  3. ↑ Sakr, Sharif. "ARM co-founder John Biggs". Engadget . Retrieved 23 December 2011. [...] the ARM7-TDMI was licensed by Texas Instruments and designed into the Nokia 6110, which was the first ARM-powered GSM phone.
  4. ↑ Walshe, Ben (13 March 2018). "A look at devices that have shaped mobile gaming". Arm Community. Retrieved 12 September 2019.
  5. ↑ "Remembering the Sega Dreamcast". 29 September 2009.
  6. ↑ Shiro Hagiwara; Ian Oliver (1999). "Sega Dreamcast: Creating a Unified Entertainment World". IEEE Micro . 19 (6): 29–35. doi:10.1109/40.809375.
  7. 1 2 "Dreamcast/ Dev.Box System Architecture" (PDF). 2 September 1999.
  8. 1 2 3 Atmel Legacy ARM-Based Solutions; Atmel.
  9. ↑ SAM7S/SE ARM7 Microcontrollers; Atmel.
  10. ↑ SAM7X/XC ARM7 Microcontrollers; Atmel.
  11. ↑ STR7 ARM7 Microcontrollers; STMicroelectronics.
  12. ↑ "Case No COMP/M.2820" (PDF). ec.europa.eu. 24 June 2002. Retrieved 20 January 2019.
  13. ↑ "Alcatel Microelectronics MTC-20276 INTQ Data Sheet" (PDF). datasheet.datasheetarchive.com. October 1998. Retrieved 20 January 2019.
  14. ↑ "Alcatel Microelectronics MTC-20277 INTT Data Sheet and User Manual" (PDF). datasheet.datasheetarchive.com. October 1998. Retrieved 20 January 2019.
  15. ↑ "TargetSpecificOptimization". www.rockbox.org. Retrieved 11 January 2019.
  16. ↑ "Ipod nano Generations - ipod touch generations". www.ipodlinux.org. Retrieved 11 January 2019.
  17. ↑ "LPC2109/2119/2129 datasheet" (PDF). 14 June 2011. Retrieved 10 June 2020.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.