CMQ82C55AZ

Product Overview

• Category: Integrated Circuit
• Use: Control and Interface IC
• Characteristics: Versatile, High-performance, Programmable
• Package: 40-pin DIP (Dual In-line Package)
• Essence: CMOS-based control and interface IC
• Packaging/Quantity: Available in tubes or reels, quantity varies based on supplier

Specifications

• Technology: CMOS (Complementary Metal-Oxide-Semiconductor)
• Supply Voltage: 5V ±10%
• Operating Temperature: -40°C to +85°C
• Input/Output Compatibility: TTL (Transistor-Transistor Logic) compatible
• Number of I/O Ports: 24
• Modes of Operation: Three modes - Mode 0 (Basic Input/Output), Mode 1 (Strobed Input/Output), Mode 2 (Bidirectional Bus)

Detailed Pin Configuration

The CMQ82C55AZ has a total of 40 pins. The pin configuration is as follows:

• Pins 1-8: Port A (PA0-PA7)
• Pins 9-16: Port B (PB0-PB7)
• Pins 17-24: Port C (PC0-PC7)
• Pins 25-32: Control Signals (RD, WR, CS, A0-A2)
• Pins 33-36: Mode Select (M0-M2)
• Pins 37-40: VCC, GND, RESET

Functional Features

• Versatility: Supports various modes of operation for different applications.
• High-performance: Capable of handling high-speed data transfer.
• Programmable: Allows customization of input/output functions through software programming.
• Interrupt Capability: Supports interrupt-driven operations for efficient data handling.
• Bidirectional Data Transfer: Enables bidirectional communication between the microprocessor and peripherals.

Advantages and Disadvantages

Advantages

• Flexible and adaptable to different applications
• High-speed data transfer capability
• Programmable for customized functionality
• Interrupt support enhances efficiency
• Bidirectional data transfer simplifies communication

Disadvantages

• Requires programming expertise for optimal utilization
• Limited number of I/O ports compared to some alternatives
• Higher power consumption compared to certain low-power ICs

Working Principles

The CMQ82C55AZ is a control and interface IC that acts as an intermediary between a microprocessor and various peripheral devices. It facilitates data transfer, input/output operations, and interrupt handling. The IC operates based on the selected mode (Mode 0, Mode 1, or Mode 2) and can be programmed to perform specific tasks as required by the application.

Detailed Application Field Plans

The CMQ82C55AZ finds applications in various fields, including:

1. Industrial Automation: Used for controlling and interfacing with sensors, actuators, and other industrial equipment.
2. Communication Systems: Facilitates data transfer and control in networking devices, modems, and telecommunication systems.
3. Embedded Systems: Provides I/O capabilities in embedded systems such as home automation, robotics, and automotive electronics.
4. Test and Measurement Equipment: Utilized for data acquisition, signal generation, and control in test and measurement instruments.
5. Gaming and Entertainment: Enables communication between gaming consoles, peripherals, and display devices.

Detailed and Complete Alternative Models

1. Intel 8255A: Similar functionality, widely used in the industry.
2. Zilog Z80PIO: Compatible with Z80 microprocessors, offers additional features.
3. Motorola MC6821: Provides similar I/O capabilities, commonly used in retrocomputing projects.

These alternative models offer similar control and interface functionalities, but their specific features and compatibility may vary.

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