CMQ82C55AZ96

Product Overview

• Category: Integrated Circuit
• Use: General Purpose Programmable Peripheral Interface
• Characteristics: Versatile, programmable, high-performance
• Package: 40-pin DIP (Dual In-line Package)
• Essence: Provides a flexible interface between microprocessors and various peripheral devices
• Packaging/Quantity: Individually packaged, quantity per package varies by supplier

Specifications

• Supply Voltage: 5V ±10%
• Operating Temperature: -40°C to +85°C
• Input/Output Logic Levels: TTL compatible
• Number of I/O Ports: 24
• Modes of Operation: Three modes - Mode 0, Mode 1, and Mode 2
• Interrupt Capability: Yes
• Clock Frequency: Up to 8 MHz

Detailed Pin Configuration

The CMQ82C55AZ96 has a total of 40 pins. The pin configuration is as follows:

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. INTA
35. INTB
36. INTC
37. INTD
38. CLK
39. GND
40. VCC

Functional Features

• Provides three 8-bit ports (Port A, Port B, and Port C) for bidirectional data transfer
• Supports various modes of operation to suit different applications
• Interrupt capability allows the processor to respond to external events promptly
• Programmable control signals enable flexible interfacing with peripheral devices
• High-speed clock frequency ensures efficient data transfer

Advantages and Disadvantages

Advantages

• Versatile and programmable, suitable for a wide range of applications
• Efficient data transfer due to high clock frequency
• Interrupt capability enhances responsiveness to external events
• Flexible interface options for connecting peripheral devices

Disadvantages

• Limited number of I/O ports may restrict the number of connected devices
• Requires careful programming to ensure correct operation
• Availability may vary depending on supplier and market demand

Working Principles

The CMQ82C55AZ96 acts as an intermediary between a microprocessor and peripheral devices. It provides programmable I/O ports that can be configured to send or receive data from external devices. The chip operates based on the selected mode, which determines the behavior of the ports and control signals. When an interrupt occurs, the CMQ82C55AZ96 interrupts the microprocessor, allowing it to handle the event promptly.

Detailed Application Field Plans

The CMQ82C55AZ96 finds applications in various fields, including:

1. Industrial Automation: Used to interface microcontrollers with sensors, actuators, and other industrial equipment.
2. Communication Systems: Enables communication between microprocessors and peripherals such as modems, UARTs, and displays.
3. Embedded Systems: Facilitates interaction between microcontrollers and external devices in embedded systems like home automation, automotive electronics, etc.
4. Robotics: Provides a flexible interface for controlling motors, sensors, and other components in robotic systems.
5. Test and Measurement Equipment: Used to connect microcontrollers with measurement devices, data acquisition systems, etc.

Detailed and Complete Alternative Models

1. Intel 8255A
2. Motorola MC6820
3. Zilog Z80PIO
4. National Semiconductor INS8255
5. Texas Instruments SN74LS244

These alternative models offer similar functionality and can be used as substitutes for the CMQ82C55AZ96 depending on availability and specific requirements.

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