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AT89C55WD-24AU

Name: AT89C55WD-24AU
Rating: 4.7 (12 reviews)

IC MCU 8BIT 20KB FLASH 44TQFP

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規格

Series	89C
Part Status	Active
DigiKey Programmable	Not Verified
Core Processor	8051
Core Size	8-Bit
Speed	24MHz
Connectivity	UART/USART
Peripherals	WDT
Number of I/O	32
Program Memory Size	20KB (20K x 8)
Program Memory Type	FLASH
RAM Size	256 x 8
Voltage - Supply (Vcc/Vdd)	4.5V ~ 5.5V
Oscillator Type	Internal
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Supplier Device Package	44-TQFP (10x10)
Package / Case	44-TQFP
Base Product Number	AT89C55

概述

Description

The AT89C55WD-24AU is a microcontroller from Atmel (now part of Microchip Technology), part of the 8051 family, featuring 40 pins and designed for embedded applications. It operates at a maximum speed of 24 MHz and is built on a CMOS technology, ensuring low power consumption.
Key features include 32 I/O pins, 8 KB of programmable Flash memory, 256 bytes of RAM, and 2048 bytes of EEPROM, which enables data retention without power. It supports various operating modes and has integrated timers, a serial communication interface, and several interrupt sources.
The AT89C55WD is particularly suitable for applications requiring reliability and versatility, such as industrial control, consumer electronics, and automation systems. Its programmability allows users to easily customize and update functionalities, making it a popular choice among developers and engineers. The device is available in various packages, including DIP and PLCC, facilitating integration into different designs.

Features

The AT89C55WD-24AU is an 8-bit microcontroller from Atmel's 8051 family, featuring the following key attributes:
1. Memory: It includes 32 KB of programmable Flash memory, 256 bytes of RAM, and 1 KB of data EEPROM.
2. I/O Ports: The microcontroller has 32 programmable I/O lines, divided into four 8-bit ports.
3. Timer/Counters: It provides two 16-bit timer/counters for various timing applications.
4. Serial Communication: Supports UART for serial communication.
5. Interrupts: It features multiple external and internal interrupts for flexible event handling.
6. Clock Speed: Operates at a clock frequency of up to 24 MHz.
7. Low Power Consumption: Designed for low power operation, making it suitable for battery-powered applications.
8. Wide Operating Voltage: Functions within a voltage range of 4.0V to 5.5V.
The AT89C55WD is ideal for embedded systems, offering robust performance and extensive peripheral capabilities.

Package

The AT89C55WD-24AU is packaged in a 40-pin dual in-line package (DIP) format.

Pinout

The AT89C55WD-24AU is an 8-bit microcontroller from Atmel (now part of Microchip Technology) with a total of 40 pins.
### Pin Functions:
1. Power Supply:
- VCC (Pin 40) - Power supply.
- GND (Pin 20) - Ground.
2. Port Inputs/Outputs:
- Port 0 (Pins 32-39) - Open-drain I/O with external pull-ups; used for data/address in external memory access.
- Port 1 (Pins 1-8) - Bidirectional I/O.
- Port 2 (Pins 21-28) - Bidirectional I/O; also used for high-order address bits during external memory access.
- Port 3 (Pins 10-17) - Bidirectional I/O; includes special function pins like RxD, TxD, and interrupts.
3. Timer/Counters:
- T0 and T1 (Pins 19 and 18) - Timer/Counter inputs.
4. Reset and Control:
- RST (Pin 9) - Reset input.
- ALE (Pin 30) - Address Latch Enable.
- PSEN (Pin 29) - Program Store Enable.
5. Oscillator:
- XTAL1 (Pin 11) and XTAL2 (Pin 12) - External oscillator connections.
This microcontroller is versatile for various embedded applications.

Manufacturer

The AT89C55WD-24AU is manufactured by Microchip Technology Inc., a leading American semiconductor company. Microchip specializes in microcontrollers, memory solutions, and analog devices, catering primarily to the embedded systems market. Founded in 1989, the company has grown through a combination of organic growth and strategic acquisitions, including the purchase of Atmel in 2016, which expanded its offerings in microcontroller products. Microchip Technology is known for its focus on providing innovative solutions, robust technical support, and a vast ecosystem for developers in various industries, including automotive, industrial, consumer electronics, and more.

Application

The AT89C55WD-24AU is an 8-bit microcontroller used in various applications such as embedded systems, industrial automation, automotive controls, consumer electronics, data acquisition systems, and communication devices. Its features, including flash memory, multiple I/O ports, and timer/counter capabilities, make it suitable for controlling processes, interfacing with sensors, and managing devices in smart systems.

Equivalent

The AT89C55WD-24AU is an 8-bit microcontroller from Atmel (now part of Microchip Technology). Equivalent products include:
1. AT89C51 - Similar architecture with less memory.
2. AT89C52 - More memory than AT89C51.
3. PIC16F877A - Microchip alternative with comparable features.
4. MCS-51 variants - Other manufacturers' compatible 8051 microcontrollers.
Always check specific requirements like memory size, I/O pins, and peripherals for exact compatibility.