{"id":3548,"date":"2026-06-06T10:25:39","date_gmt":"2026-06-06T10:25:39","guid":{"rendered":"https:\/\/materialparts.com\/at89s8253-24au\/"},"modified":"2026-06-06T10:25:39","modified_gmt":"2026-06-06T10:25:39","slug":"at89s8253-24au","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/at89s8253-24au\/","title":{"rendered":"AT89S8253-24AU"},"content":{"rendered":"

\u0646\u0638\u0631\u0629 \u0639\u0627\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0646\u062a\u062c<\/h2>\n

The AT89S8253-24AU from Microchip Technology (formerly Atmel) is a low-power 8-bit 8051 microcontroller with 12KB ISP Flash and 2KB EEPROM. Operating at up to 24 MHz with 256B RAM, it features an enhanced SPI interface, dual data pointer, programmable watchdog timer, and 32 I\/O lines in a 44-pin TQFP package.<\/p>\n

\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u0627\u0644\u0623\u0633\u0627\u0633\u064a\u0627\u062a<\/td>\n8051 (MCS-51 compatible)<\/td>\n<\/tr>\n
\u0641\u0644\u0627\u0634<\/td>\n12 KB (ISP)<\/td>\n<\/tr>\n
EEPROM<\/td>\n2 KB<\/td>\n<\/tr>\n
RAM<\/td>\n256 bytes<\/td>\n<\/tr>\n
Max Clock<\/td>\n24 MHz<\/td>\n<\/tr>\n
I\/O Pins<\/td>\n32<\/td>\n<\/tr>\n
\u0627\u0644\u0645\u0624\u0642\u062a\u0627\u062a<\/td>\n3 x 16-bit<\/td>\n<\/tr>\n
Interrupts<\/td>\n9 sources<\/td>\n<\/tr>\n
Interfaces<\/td>\nUART, Enhanced SPI<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u0625\u0645\u062f\u0627\u062f<\/td>\n2.7V – 5.5V<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nTQFP-44 (10 x 10 mm)<\/td>\n<\/tr>\n
Operating Temp<\/td>\n-40 to 85 C<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • 12KB In-System Programmable Flash via SPI<\/li>\n
  • 2KB EEPROM data memory (100,000 cycles)<\/li>\n
  • Enhanced SPI with double write\/read buffer<\/li>\n
  • Programmable Watchdog Timer<\/li>\n
  • Dual Data Pointer for faster memory operations<\/li>\n
  • x2 Clock Option for 12 MHz equivalent at 6 MHz crystal<\/li>\n
  • Interrupt recovery from Power-down mode<\/li>\n
  • Three-level Program Memory Lock for security<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Legacy 8051 system upgrades and replacements<\/li>\n
    • Industrial control with SPI peripherals<\/li>\n
    • Data logging with on-chip EEPROM<\/li>\n
    • Battery-powered instruments<\/li>\n
    • Embedded firmware with in-field update capability<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The AT89S8253-24AU from Microchip Technology (formerly Atmel) is a low-power 8-bit 8051 microcontroller with 12KB ISP Flash and 2KB EEPROM. Operating at up to 24 MHz with 256B RAM, it features an enhanced SPI interface, dual data pointer, programmable watchdog timer, and 32 I\/O lines in a 44-pin TQFP package. Key Specifications Core […]<\/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-3548","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-microcontrollers-mcu","chip_brand-microchip"],"acf":{"brief_explanation":"8051 MCU, 12KB ISP Flash, 2KB EEPROM, 24MHz, SPI, WDT, TQFP-44","date_code":"","package_case":"TQFP-44 (10.1 x 10.1 x 1.05 mm)","in_stock":12603,"datasheet":"https:\/\/ww1.microchip.com\/downloads\/en\/DeviceDoc\/doc3286.pdf","price":"$2.70 @ 1ku","product_introduction":"The AT89S8253-24AU from Microchip Technology is a low-power, high-performance CMOS 8-bit microcontroller with 12KB of In-System Programmable (ISP) Flash and 2KB of EEPROM data memory. Compatible with the industry-standard MCS-51 instruction set and pinout, it supports ISP programming through an SPI serial interface for convenient in-field firmware updates. The enhanced SPI features double write\/read buffering for faster data throughput. With a programmable watchdog timer, dual data pointer, and x2 clock option, it provides a flexible and cost-effective solution for legacy 8051 applications.","working_principle":"The AT89S8253-24AU implements the MCS-51 architecture with 256 bytes of internal RAM and 32 I\/O lines. The ISP Flash is programmed through the SPI interface in byte or page mode (64 bytes\/page for code, 32 bytes\/page for data). The enhanced SPI interface uses double buffering: a write buffer allows continuous data streaming without waiting for the shift register to complete, and a read buffer holds the previous byte while the next is being shifted in. The dual data pointer (DPTR0\/DPTR1) accelerates memory block operations. The x2 clock option doubles the effective execution speed by running the CPU at twice the oscillator frequency, reducing EMI by allowing a lower crystal frequency.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      P0.0-P0.7<\/td>8<\/td>I\/O<\/td>Port 0 (open-drain, addr\/data bus)<\/td><\/tr>
      P1.0-P1.7<\/td>8<\/td>I\/O<\/td>Port 1 \/ SPI (MOSI, MISO, SCK, SS)<\/td><\/tr>
      P2.0-P2.7<\/td>8<\/td>I\/O<\/td>Port 2 \/ Address bus (high byte)<\/td><\/tr>
      P3.0-P3.7<\/td>8<\/td>I\/O<\/td>Port 3 \/ UART \/ INT \/ Timers<\/td><\/tr>
      VCC<\/td>1<\/td>Power<\/td>Supply (2.7-5.5V)<\/td><\/tr>
      GND<\/td>1<\/td>Ground<\/td>Ground<\/td><\/tr>
      RST<\/td>1<\/td>I\/O<\/td>Reset (active high)<\/td><\/tr>
      XTAL1\/2<\/td>2<\/td>I\/O<\/td>External crystal oscillator<\/td><\/tr>
      EA\/VPP<\/td>1<\/td>Input<\/td>External access enable \/ programming voltage<\/td><\/tr><\/table>","application_scenarios":"
      • Legacy 8051 system upgrades: Drop-in replacement with ISP capability<\/li>
      • Data logging: 2KB on-chip EEPROM for configuration and calibration storage<\/li>
      • Industrial SPI peripherals: Enhanced SPI with double buffering for high-speed communication<\/li>
      • Battery instruments: 2.7V minimum operation with Power-down mode<\/li>
      • Embedded firmware updates: In-System Programming via SPI for field deployment<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Microchip<\/td>AT89S8253-24PU<\/td>PDIP-40<\/td>Through-hole 40-pin version<\/td><\/tr>
        Microchip<\/td>AT89S52-24AU<\/td>TQFP-44<\/td>8KB Flash, no EEPROM, lower cost<\/td><\/tr>
        Silicon Labs<\/td>C8051F340-GQR<\/td>LQFP-48<\/td>USB 2.0, 64KB Flash, 48 MIPS<\/td><\/tr>
        ST<\/td>STM8S105C6T6<\/td>LQFP-48<\/td>8-bit STM8, 32KB Flash, modern core<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3548","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/comments?post=3548"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3548\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=3548"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=3548"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=3548"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=3548"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}