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AT89S8253-24AU

8051 MCU, 12KB ISP Flash, 2KB EEPROM, 24MHz, SPI, WDT, TQFP-44

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Pieza del fabricante：

AT89S8253-24AU

Paquete：

TQFP-44 (10.1 x 10.1 x 1.05 mm)

Marca：
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Compromiso de calidad
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Descripción

Productos

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.

Especificaciones

Núcleo 8051 (MCS-51 compatible)
Flash 12 KB (ISP)
EEPROM 2 KB
RAM 256 bytes
Max Clock 24 MHz
I/O Pins 32
Temporizadores 3 x 16-bit
Interrupts 9 sources
Interfaces UART, Enhanced SPI
Tensión de alimentación 2.7V – 5.5V
Paquete TQFP-44 (10 x 10 mm)
Temperatura de funcionamiento -40 to 85 C

Características

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

Aplicaciones

  • Legacy 8051 system upgrades and replacements
  • Industrial control with SPI peripherals
  • Data logging with on-chip EEPROM
  • Battery-powered instruments
  • Embedded firmware with in-field update capability

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.

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 Nombre Tipo Función
P0.0-P0.7 8 E/S Port 0 (open-drain, addr/data bus)
P1.0-P1.7 8 E/S Port 1 / SPI (MOSI, MISO, SCK, SS)
P2.0-P2.7 8 E/S Port 2 / Address bus (high byte)
P3.0-P3.7 8 E/S Port 3 / UART / INT / Timers
VCC 1 Potencia Supply (2.7-5.5V)
GND 1 Suelo Suelo
RST 1 E/S Reset (active high)
XTAL1/2 2 E/S External crystal oscillator
EA/VPP 1 Entrada External access enable / programming voltage
  • Legacy 8051 system upgrades: Drop-in replacement with ISP capability
  • Data logging: 2KB on-chip EEPROM for configuration and calibration storage
  • Industrial SPI peripherals: Enhanced SPI with double buffering for high-speed communication
  • Battery instruments: 2.7V minimum operation with Power-down mode
  • Embedded firmware updates: In-System Programming via SPI for field deployment
Fabricante Número de pieza Paquete Notas
Microchip AT89S8253-24PU PDIP-40 Through-hole 40-pin version
Microchip AT89S52-24AU TQFP-44 8KB Flash, no EEPROM, lower cost
Laboratorios Silicon C8051F340-GQR LQFP-48 USB 2.0, 64KB Flash, 48 MIPS
ST STM8S105C6T6 LQFP-48 8-bit STM8, 32KB Flash, modern core
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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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