AT89C55WD-24PI

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Compact 8-bit MCU

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AT89C55WD-24PI DataSheet

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AT89C55WD-24PI Details

The AT89C55WD-24PI is a high-performance 8-bit microcontroller from Atmel, featuring 24MHz clock frequency and 20 I/O lines for versatile connectivity. This microcontroller offers Flash memory for program storage, EEPROM for data retention, and various communication interfaces for embedded system development.

Pinout

  • 1 (RST): Reset
  • 2 (P1.0): Port 1.0
  • 3 (P1.1): Port 1.1
  • ...
  • 40 (P3.7): Port 3.7

(Tip: For detailed pinout information, please refer to the corresponding datasheet.)

Key Features

  • High Clock Speed: Operates at 24MHz for fast processing.
  • Flash Memory: Provides program memory for embedded applications.
  • EEPROM: Offers non-volatile data storage for critical information.
  • Communication Interfaces: Supports UART, SPI, and I2C for flexible connectivity.
  • Timer/Counters: Includes multiple timers for precise timing control.

Application

  • Embedded Systems: Suitable for building various embedded control applications.
  • IoT Devices: Used in Internet of Things devices for data processing and control.
  • Automotive Electronics: Commonly found in automotive control systems for functionality and reliability.

How to Use

Integrate the AT89C55WD-24PI into your circuit design by connecting power and ground to the appropriate pins. Utilize the I/O lines for communication and interfacing with external components. Program the device using Flash memory and store critical data in EEPROM for persistent storage. Refer to the datasheet for detailed programming and usage instructions.

Application Circuit

The application circuit diagram for the AT89C55WD-24PI demonstrates how to connect the microcontroller to peripheral components and power sources. It illustrates the connections for programming, communication, and I/O operations to enable proper functionality.

(Tip: For detailed circuit diagram connections and usage guide, refer to the datasheet.)

Equivalents

  • AT89C52: A similar 8-bit microcontroller with compatible features and performance.
  • ATmega32: An alternative microcontroller offering enhanced capabilities for advanced applications.

Complementary

The AT89C55WD-24PI can be paired with the AT24C02 EEPROM for extended data storage capabilities and the MAX232 for RS-232 communication support, enhancing its functionality in diverse applications.

Ensure compatibility and proper interfacing when selecting complementary components for your design.

Frequently Asked Questions

Q: What is the maximum clock speed of the AT89C55WD-24PI?

A: The AT89C55WD-24PI operates at a maximum clock speed of 24MHz, enabling fast processing and response times in embedded applications.

Q: Can the AT89C55WD-24PI be used in industrial control systems?

A: Yes, the AT89C55WD-24PI is suitable for industrial control applications, offering versatile I/O capabilities and reliable performance for various system control tasks.

Specifications

The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Product Category ! 8-bit Microcontrollers - MCU RoHS N
Series AT89C55WD Mounting Style Through Hole
Package / Case PDIP-40 Core 8051
Program Memory Size 20 kB Data Bus Width 8 bit
ADC Resolution No ADC Maximum Clock Frequency 33 MHz
Number of I/Os 32 I/O Data RAM Size 256 B
Supply Voltage - Min 4 V Supply Voltage - Max 5.5 V
Minimum Operating Temperature 0 C Maximum Operating Temperature ! + 70 C
Brand Microchip Technology Data ROM Type Flash
Height 4.83 mm Length 52.58 mm
Number of Timers/Counters 3 Timer Product Type ! 8-bit Microcontrollers - MCU
Program Memory Type ! Flash Factory Pack Quantity 10
Subcategory Microcontrollers - MCU Width 13.97 mm
Unit Weight 0.210004 oz

Datasheet PDF

Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.

Preliminary Specification AT89C55WD-24PI PDF Download

FAQs

What is AT89C55WD-24PI?

The AT89C55WD-24PI is a high-performance flash version of the 80C51 8-bit microcontroller family. It is manufactured by Atmel Corporation and is commonly used in various embedded system applications such as automotive, industrial control, and consumer electronics.

How Does AT89C55WD-24PI Work?

The AT89C55WD-24PI operates as a versatile microcontroller with a powerful CPU, flash memory, and a wide range of peripherals. It can execute instructions at high speed and is capable of interfacing with external devices through its I/O ports, serial interfaces, and timers. With its flash memory, the microcontroller can be easily reprogrammed for different applications.

How Many Pins does AT89C55WD-24PI have and What are the Functions of the Pinout Configuration?

The AT89C55WD-24PI is housed in a 40-pin Dual In-Line Package (DIP). The pinout configuration includes:

  • VCC: Supply voltage pin.
  • GND: Ground pin.
  • Port 0 (P0.0 - P0.7): 8-bit parallel I/O port with quasi-bidirectional pins.
  • Port 1 (P1.0 - P1.7): 8-bit parallel I/O port with internal pull-ups.
  • Port 2 (P2.0 - P2.7): 8-bit parallel I/O port with internal pull-ups.
  • Port 3 (P3.0 - P3.7): 8-bit parallel I/O port with internal pull-ups and special functions.
  • RXD, TXD: Serial communication pins.
  • INT0, INT1: External interrupt pins.
  • Timer and Counter Pins: Pins for various timer and counter functions.

What are the Pros and Cons of AT89C55WD-24PI?

Pros:

  • Versatility: Offers a wide range of peripheral functions and I/O capabilities for diverse applications.
  • Reprogrammable Flash Memory: Allows for easy updates and modifications to the program code.
  • Industry-standard Architecture: Based on the popular 80C51 microcontroller architecture with a large user base.
  • High Performance: Capable of executing instructions at high speed with low power consumption.
  • Robust Ecosystem: Supported by various development tools and resources for software and hardware development.

Cons:

  • Package Size: The 40-pin DIP package may be relatively large for space-constrained designs.
  • Complexity: Can be overwhelming for beginners due to the wide range of features and peripherals.
  • Obsolete: As technology advances, newer microcontrollers with advanced features may become preferred over the AT89C55WD-24PI.

Are There Any Equivalents/Alternatives to AT89C55WD-24PI for Recommendation?

  • The AT89S52-24PU from Atmel is a similar 8-bit microcontroller with flash memory and versatile peripherals.
  • Alternatives to the AT89C55WD-24PI include the PIC16F877A from Microchip and the MSP430G2553 from Texas Instruments.

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