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8051: Definition and Recommended Links

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The Intel 8051 is a Harvard architecture, single chip microcontroller (µC) which was developed by Intel in 1980 for use in embedded systems. Intel's original versions were popular in the 1980s and early 1990s, but has today largely been superseded by a vast range of faster and/or functionally enhanced 8051-compatible devices manufactured by more than 20 independent manufacturers including Atmel, Infineon Technologies, Maxim Integrated Products (via its Dallas Semiconductor subsidiary), NXP (formerly Philips Semiconductor), Winbond, ST Microelectronics, Silicon Laboratories (formerly Cygnal), Texas Instruments and Cypress Semiconductor. Intel's official designation for the 8051 family of µCs is MCS 51.

Intel's original 8051 family was developed using NMOS technology, but later versions, identified by a letter 'C' in their name, e.g. 80C51, used CMOS technology and were less power-hungry than their NMOS predecessors - this made them eminently more suitable for battery-powered devices.

Source: Wikipedia (http://en.wikipedia.org/wiki/8051)

other great electronics sites:ee toolbox site

• • 8051
    • The Intel 8051 is a Harvard architecture, single chip microcontroller (µC) which was developed by Intel in 1980 for use in embedded systems. Intel's original versions were popular in the 1980s and early 1990s, but has today largely been superseded by a vast range of faster and/or functionally enhanced 8051-compatible devices manufactured by more than 20 independent manufacturers including Atmel, Infineon Technologies, Maxim Integrated Products (via its Dallas Semiconductor subsidiary), NXP (formerly Philips Semiconductor), Winbond, ST Microelectronics, Silicon Laboratories (formerly Cygnal), Texas Instruments and Cypress Semiconductor. Intel's official designation for the 8051 family of µCs is MCS 51.

      Intel's original 8051 family was developed using NMOS technology, but later versions, identified by a letter 'C' in their name, e.g. 80C51, used CMOS technology and were less power-hungry than their NMOS predecessors - this made them eminently more suitable for battery-powered devices.

      Source: Wikipedia (http://en.wikipedia.org/wiki/8051)

      (Note: The Electronic Engineers Toolbox provides an alternative set of featured links for this word at http://www.cera2.com/8051.htm)

      Featured Links:

      8051 Links from Programmers Heaven

      Links to 8051 from Programmers Heaven - includes software and shareware, plus an annoying plug for Keil Software (commercial) but some good non-commercial stuff as well...
      http://www.programmersheaven.com/zone5/mh7.htm

      IAR Development Kits

      IAR Systems provides completely integrated kits for development of embedded applications based on ARM, 8051, MSP430 and R8C/M16C/M32C: ARM kits 8051 kits MSP430 kits R8C/M16C/M32C kits Each kit contains a development board, software development tools with sample projects and a hardware debug probe or emulator.
      http://www.iar.com

      Jan Axelson's Lakeview Research

      The source for information and tools relating to USB, parallel ports, RS-232 and RS-485 serial communications, 8052-Basic microcontrollers, and making printed-circuit boards. Mr. Axelson has written a number of books, and has created web pages of resources for each topic. Also has information on the Serial Port.
      http://www.lvr.com/

      ULINK Support for NXP P89LPC952 & P89LPC954

      Keil has introduced target debugging and programming support for NXP 8051 based devices using the ULINK family of USB to JTAG adapters. The NXP P89LPC952 and P89LPC954 devices support a 2-wire debug interface that provides access to an on-chip debug system. The ULINK2 connects the PC's USB port to the NXP P89LPC95x device series and enables Flash programming and debugging of user programs on the target hardware. ULINK-ME is a reduced...
      http://www.keil.com/pr/article/1142.htm

      SST Launches Enhanced Performance FlashFlex Microcontroller

      SST (Silicon Storage Technology, Inc., NASDAQ: SSTI), a leader in flash memory technology, today announced a new addition to its FlashFlex family of 8-bit microcontrollers (MCUs), the SST89C58RC. The new device is the industry's first 8051-based MCU to feature two system management buses (SMBus), each supporting up to 400 Kbit per second data throughput, in a tiny 6mm x 6mm QFN package. The SST89C58RC supports operating voltages from 2.7V to...
      http://www.sst.com

      Free 8051 Macro Assembler

      The 8051 Cross Assembler takes an assembly language source file created with a text editor and translates it into a machine language object file. This translation process is done in two passes over the source file. During the first pass, the Cross Assembler builds a symbol table from the symbols and labels used in the source file.
      http://www.metaice.com/ASM51/ASM51.htm

      Micro C 8051 Development System

      The ultimate 8051 Development system at a very affordable price. This fully integrated system includes: Micro-IDE - a Windows-based Integrated Development Environment Micro C - Optimizing 8051 C Compiler, Assembler, Linker, Serial Loaders, Terminal, complete online documentation including C Tutorial, C Library Reference, Technical Manual and Project Examples
      http://www.bipom.com/8051dev.php

      Myke's Home Page - 8051, PIC

      Tons of useful stuff - explanations, diagrams, book reviews, etc. - on microcontrollers and microprocessors for embedded development by a recognized author. Special focus on PIC & 8051. A wonderful personal page.
      http://www.myke.com/

      The 8051 Simulator for Lecturers and Students

      Do you want to learn about microcontrollers and embedded systems? Are you studying the 8051 microcontroller? Do you want to test your code for communicating with peripherals without having to first build the hardware? Are you teaching an embedded systems course and would like your students to have access to a virtual 8051 training kit? If the answer to any or all of the above is true, then you've come to the right place. The...
      http://www.edsim51.com/

      FreeRTOS - Realtime Scheduler

      Portable, open source, mini Real Time Kernel - a free to download and royalty free RTOS that can be used in commercial applications. FreeRTOS is licensed under a modified GPL and can be used in commercial applications under this license. (Supports ARM Cortex-M3, ARM7, ARM9, HCS12, H8S, MSP430, Microblaze, Coldfire, AVR, x86, 8051, PIC24 & dsPIC.)
      http://www.freertos.org/

      Explanation: these links are provided as part of our EE glossary project, which seeks to identify the most prominent keywords in embedded systems, embedded software, realtime and rtos, dsp (digital signal processing), system-on-a-chip, microprocessors and microcontrollers, and other constituent elements for embedded systems. While we seek to keep most of the links up-to-date, the user is refered to other primary electronic-based search sites such as: cera2.com, embedded.com, or EDN Magazine. If you have any suggestions of links or definitions, please email!

Mark Twain quote for the day:

Nearby is an interesting ruin- the meager remains of an ancient temple- a place where human sacrifices were offered up in those old bygone days...long, long before the missionaries braved a thousand privations to come and make [the natives] permanently miserable by telling them how beautiful and how blissful a place heaven is, and how nearly impossible it is to get there; and showed the poor native how dreary a place perdition is and what unnecessarily liberal facilities there are for going to it; showed him how, in his ignorance, he had gone and fooled away all his kinsfolk to no purpose; showed him what rapture it is to work all day long for fifty cents to buy food for next day with, as compared with fishing for a pastime and lolling in the shade through eternal summer, and eating of the bounty that nobody labored to provide but Nature. How sad it is to think of the multitudes who have gone to their gaves in this beautiful island and never knew there was a hell.
- Roughing It