{"id":5442,"date":"2026-06-10T02:07:54","date_gmt":"2026-06-10T02:07:54","guid":{"rendered":"https:\/\/materialparts.com\/at89c51ed2-slsum\/"},"modified":"2026-06-10T02:07:54","modified_gmt":"2026-06-10T02:07:54","slug":"at89c51ed2-slsum","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/at89c51ed2-slsum\/","title":{"rendered":"AT89C51ED2-SLSUM"},"content":{"rendered":"

Productos<\/h2>\n

The AT89C51ED2-SLSUM from Microchip Technology (formerly Atmel) is an 8051-based 8-bit microcontroller with 64KB Flash, 2KB EEPROM, and 2KB XRAM in a 44-pin PLCC package. Running at up to 60MHz in X2 mode with ISP capability, it upgrades the classic 80C52 with SPI, PCA, and enhanced UART.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
N\u00facleo<\/td>\n80C51 (8-bit CISC)<\/td>\n<\/tr>\n
Clock Speed<\/td>\n40 MHz (standard), 60 MHz (X2 mode)<\/td>\n<\/tr>\n
Flash Memory<\/td>\n64 KB (ISP capable)<\/td>\n<\/tr>\n
Internal RAM<\/td>\n256 bytes (80C52 compatible)<\/td>\n<\/tr>\n
XRAM<\/td>\n1792 bytes (software selectable)<\/td>\n<\/tr>\n
Data EEPROM<\/td>\n2048 bytes (100k cycles)<\/td>\n<\/tr>\n
I\/O Pins<\/td>\n34<\/td>\n<\/tr>\n
UART<\/td>\n1x Enhanced UART with auto-baud<\/td>\n<\/tr>\n
SPI<\/td>\n1x Master\/Slave<\/td>\n<\/tr>\n
PCA<\/td>\n1x (5 modules: PWM, capture, compare)<\/td>\n<\/tr>\n
Temporizadores<\/td>\n3x 16-bit<\/td>\n<\/tr>\n
Tensi\u00f3n de alimentaci\u00f3n<\/td>\n2.7V to 5.5V<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n-40 to +85 C<\/td>\n<\/tr>\n
Paquete<\/td>\nPLCC-44<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • 80C52-compatible with 64KB Flash ISP<\/li>\n
  • 60MHz X2 mode (6 clocks\/machine cycle)<\/li>\n
  • 2KB EEPROM and 1792 bytes XRAM<\/li>\n
  • Programmable Counter Array (PCA)<\/li>\n
  • Enhanced UART with auto-baud detection<\/li>\n
  • SPI interface (master\/slave)<\/li>\n
  • Keyboard interrupt on Port 1<\/li>\n
  • Hardware watchdog timer<\/li>\n
  • Dual data pointer<\/li>\n
  • Internal programming voltage generation<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • Legacy 8051 system upgrades<\/li>\n
    • Motor control with PCA PWM<\/li>\n
    • Smart card readers<\/li>\n
    • Industrial control and alarms<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The AT89C51ED2-SLSUM from Microchip Technology (formerly Atmel) is an 8051-based 8-bit microcontroller with 64KB Flash, 2KB EEPROM, and 2KB XRAM in a 44-pin PLCC package. Running at up to 60MHz in X2 mode with ISP capability, it upgrades the classic 80C52 with SPI, PCA, and enhanced UART. Key Specifications Core 80C51 (8-bit CISC) […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,25],"tags":[],"chip_brand":[134],"class_list":["post-5442","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-microcontrollers-mcu","chip_brand-microchip"],"acf":{"brief_explanation":"8051 MCU, 64KB Flash, 2KB EEPROM, ISP, 60MHz X2, SPI, PCA, PLCC-44","date_code":"","package_case":"PLCC-44 (16.66 x 16.66 x 4.06 mm, through-hole)","in_stock":2796,"datasheet":"https:\/\/www.microchip.com\/content\/dam\/mchp\/documents\/OTH\/ProductDocuments\/DataSheets\/doc4289.pdf","price":"$10.31 @ 1ku","product_introduction":"The AT89C51ED2-SLSUM from Microchip Technology is a high-performance 80C51-compatible 8-bit microcontroller in a 44-pin PLCC surface-mount package. The ED2 variant includes 2KB data EEPROM in addition to 64KB Flash and 1792 bytes XRAM. The SL suffix denotes PLCC-44 package, S indicates surface mount, U denotes industrial temperature range (-40 to +85C), and M denotes tube packaging. The AT89C51ED2 retains all 80C52 features (256 bytes RAM, 3 timers, 4 I\/O ports) while adding ISP (In-System Programming) capability with internally generated programming voltage, SPI interface, Programmable Counter Array (PCA) with 5 modules, enhanced UART with auto-baud detection, keyboard interrupt, and hardware watchdog. The X2 mode doubles performance by reducing the machine cycle from 12 to 6 oscillator periods, enabling 60MHz effective operation with a 30MHz crystal.","working_principle":"The AT89C51ED2 operates through four subsystems: (1) 80C51 Core: A CISC 8-bit CPU executing the industry-standard 8051 instruction set. In standard mode, each machine cycle takes 12 oscillator periods (40MHz max). In X2 mode, the machine cycle is reduced to 6 periods, effectively doubling throughput at the same crystal frequency. The dual data pointer (DPTR) speeds up memory-to-memory data transfers. (2) Memory Architecture: 64KB Flash for program storage with ISP capability via the boot ROM. 256 bytes internal RAM (direct\/indirect addressable). 1792 bytes XRAM (software-selectable size from 0 to 1792 bytes). 2KB data EEPROM (100k cycle endurance) for non-volatile parameter storage. (3) Enhanced Peripherals: SPI interface (master\/slave, up to 10MHz clock). Programmable Counter Array (PCA) with 5 modules supporting high-speed output, PWM, capture\/compare, and watchdog functions. Enhanced UART with dedicated baud rate generator, auto-baud detection, and framing error detection. (4) ISP Programming: A boot ROM contains low-level Flash programming routines and a default serial loader. Programming voltage is internally generated from VCC, eliminating the need for an external 12V programming supply. ISP allows firmware updates in the field without removing the device from the board.","pin_description":"
      Pin Group<\/th>Count<\/th>Type<\/th>Description<\/th><\/tr>
      P0<\/td>8<\/td>I\/O<\/td>Port 0 (open-drain, address\/data bus)<\/td><\/tr>
      P1<\/td>8<\/td>I\/O<\/td>Port 1 (keyboard interrupt, PCA, SPI)<\/td><\/tr>
      P2<\/td>8<\/td>I\/O<\/td>Port 2 (address bus high byte)<\/td><\/tr>
      P3<\/td>8<\/td>I\/O<\/td>Port 3 (UART, INT, T0\/T1, WR\/RD)<\/td><\/tr>
      VCC\/GND<\/td>Multiple<\/td>Power<\/td>Supply and ground<\/td><\/tr>
      EA<\/td>1<\/td>Input<\/td>External access enable<\/td><\/tr>
      ALE\/PROG<\/td>1<\/td>I\/O<\/td>Address latch enable \/ program pulse<\/td><\/tr>
      PSEN<\/td>1<\/td>Output<\/td>Program store enable<\/td><\/tr>
      RST<\/td>1<\/td>I\/O<\/td>Reset input \/ watchdog reset output<\/td><\/tr><\/table>","application_scenarios":"
      • Legacy 8051 system upgrade with ISP capability, 64KB Flash, and 60MHz X2 mode performance<\/li>
      • Motor control using PCA PWM modules and enhanced UART for Modbus communication<\/li>
      • Smart card reader with SPI interface, 2KB EEPROM for key storage, and auto-baud UART<\/li>
      • Industrial alarm system with keyboard interrupt on Port 1, hardware watchdog, and 2KB EEPROM<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Flash<\/th>Core<\/th>Notes<\/th><\/tr>
        AT89C51RD2-SLSUM<\/td>Microchip<\/td>64KB<\/td>8051<\/td>Without EEPROM<\/td><\/tr>
        AT89C51ID2-SLSUM<\/td>Microchip<\/td>64KB<\/td>8051<\/td>With TWI, similar features<\/td><\/tr>
        AT89LP51RB2-20PU<\/td>Microchip<\/td>16KB<\/td>8051<\/td>Low-power, 20MHz<\/td><\/tr>
        C8051F340-GQ<\/td>Silicon Labs<\/td>64KB<\/td>8051<\/td>100MHz, USB<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/5442","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/comments?post=5442"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/5442\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=5442"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=5442"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=5442"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=5442"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}