Intersil
La imagen puede ser una representación.
Consulte las especificaciones para obtener detalles del producto.
CQ82C55A
Ver Detalle Hojas de datos

CQ82C55A

Product Overview

Category

The CQ82C55A belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used for interfacing peripheral devices with microprocessors or microcontrollers.

Characteristics

  • The CQ82C55A is a versatile and highly reliable IC.
  • It offers multiple programmable I/O ports, making it suitable for various applications.
  • It operates at low power consumption levels, ensuring energy efficiency.
  • The IC is designed to withstand harsh environmental conditions, enhancing its durability.

Package

The CQ82C55A is available in a compact and industry-standard 40-pin DIP (Dual Inline Package) format.

Essence

The essence of the CQ82C55A lies in its ability to facilitate seamless communication between microprocessors and peripheral devices.

Packaging/Quantity

The IC is typically packaged in anti-static tubes or trays, with each package containing a single unit of the CQ82C55A.

Specifications

  • Supply Voltage: 5V
  • Operating Temperature Range: -40°C to +85°C
  • Maximum Clock Frequency: 8 MHz
  • Number of Programmable I/O Ports: 24
  • Number of Timers/Counters: 2
  • Data Bus Width: 8 bits

Detailed Pin Configuration

The CQ82C55A features a total of 40 pins. Here is a detailed pin configuration:

  1. PA0
  2. PA1
  3. PA2
  4. PA3
  5. PA4
  6. PA5
  7. PA6
  8. PA7
  9. GND
  10. PB0
  11. PB1
  12. PB2
  13. PB3
  14. PB4
  15. PB5
  16. PB6
  17. PB7
  18. PC0
  19. PC1
  20. PC2
  21. PC3
  22. PC4
  23. PC5
  24. PC6
  25. PC7
  26. VCC
  27. RD
  28. WR
  29. CS
  30. A0
  31. A1
  32. A2
  33. RESET
  34. CLK
  35. OUTA
  36. OUTB
  37. INT
  38. INTR
  39. XTAL1
  40. XTAL2

Functional Features

  • The CQ82C55A offers three modes of operation: mode 0, mode 1, and mode 2.
  • It supports bidirectional data transfer between the microprocessor and peripheral devices.
  • The IC features programmable interrupt control for efficient handling of interrupts.
  • It provides timers/counters for accurate timing and counting operations.
  • The CQ82C55A allows for parallel input/output operations, enhancing data transfer speed.

Advantages and Disadvantages

Advantages

  • Versatile and adaptable to various applications.
  • Low power consumption ensures energy efficiency.
  • High reliability and durability.
  • Programmable I/O ports offer flexibility in interfacing with different devices.

Disadvantages

  • Limited number of timers/counters compared to some other ICs.
  • Requires external clock signal for proper operation.

Working Principles

The CQ82C55A operates by receiving commands from the microprocessor and executing them to perform specific tasks. It communicates with peripheral devices through its programmable I/O ports, enabling data transfer in both directions. The IC utilizes timers/counters for precise timing and counting operations. Interrupt control is implemented to efficiently handle interrupts generated by peripheral devices or the microprocessor.

Detailed Application Field Plans

The CQ82C55A finds extensive use in various applications, including but not limited to: - Industrial automation systems - Robotics - Communication equipment - Data acquisition systems - Embedded systems

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the CQ82C55A are: - Intel 8255 - Motorola MC6821 - Zilog Z80PIO

These alternatives can be considered based on specific requirements and compatibility with existing systems.

Word count: 529 words

Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de CQ82C55A en soluciones técnicas

Sure! Here are 10 common questions and answers related to the application of CQ82C55A in technical solutions:

  1. Question: What is CQ82C55A?
    Answer: CQ82C55A is a programmable peripheral interface chip commonly used in technical solutions for interfacing microprocessors with various peripheral devices.

  2. Question: What are the key features of CQ82C55A?
    Answer: The key features of CQ82C55A include three 8-bit bidirectional I/O ports, two modes of operation (mode 0 and mode 1), and interrupt capability.

  3. Question: How can CQ82C55A be used in technical solutions?
    Answer: CQ82C55A can be used to interface microprocessors with devices such as keyboards, displays, printers, sensors, and other peripheral devices.

  4. Question: What are the different modes of operation in CQ82C55A?
    Answer: CQ82C55A has two modes of operation: mode 0 (basic input/output mode) and mode 1 (strobe input/output mode).

  5. Question: How does CQ82C55A handle interrupts?
    Answer: CQ82C55A supports interrupt capability, allowing it to generate interrupts to the microprocessor based on certain conditions or events.

  6. Question: Can CQ82C55A be used in both parallel and serial communication?
    Answer: Yes, CQ82C55A can be used for both parallel and serial communication, depending on the mode of operation and configuration.

  7. Question: What is the maximum data transfer rate supported by CQ82C55A?
    Answer: The maximum data transfer rate supported by CQ82C55A is typically around 1 MHz.

  8. Question: Can CQ82C55A be used in real-time applications?
    Answer: Yes, CQ82C55A can be used in real-time applications as it provides efficient and reliable interfacing capabilities.

  9. Question: Are there any limitations or considerations when using CQ82C55A?
    Answer: Some considerations include proper configuration of the chip, understanding the timing requirements, and ensuring compatibility with the microprocessor being used.

  10. Question: Is CQ82C55A still widely used in modern technical solutions?
    Answer: While newer interface chips have emerged, CQ82C55A is still used in certain legacy systems and applications where its specific features and compatibility are required.

Please note that the answers provided here are general and may vary depending on the specific implementation and requirements of the technical solution.