ID82C55A

Product Overview

• Category: Integrated Circuit
• Use: General Purpose Programmable Peripheral Interface
• Characteristics:
  • Versatile and flexible
  • High performance
  • Easy to interface with microprocessors
• Package: Dual In-Line Package (DIP)
• Essence: Provides programmable input/output functions for interfacing with various peripheral devices.
• Packaging/Quantity: Typically sold in packs of 10 or 25 units.

Specifications

• Supply Voltage: 5V
• Operating Temperature Range: -40°C to +85°C
• Maximum Clock Frequency: 8 MHz
• Number of I/O Pins: 24
• Programmable Modes: Mode 0, Mode 1, Mode 2, Mode 3

Detailed Pin Configuration

The ID82C55A has a total of 40 pins. The pin configuration is as follows:

1. PA0 (I/O) | 21. PC7 (I/O)
2. PA1 (I/O) | 22. GND
3. PA2 (I/O) | 23. ALE
4. PA3 (I/O) | 24. RD
5. PA4 (I/O) | 25. WR
6. PA5 (I/O) | 26. CS
7. PA6 (I/O) | 27. RESET
8. PA7 (I/O) | 28. VCC
9. PB0 (I/O) | 29. PC0 (I/O)
10. PB1 (I/O) | 30. PC1 (I/O)
11. PB2 (I/O) | 31. PC2 (I/O)
12. PB3 (I/O) | 32. PC3 (I/O)
13. PB4 (I/O) | 33. PC4 (I/O)
14. PB5 (I/O) | 34. PC5 (I/O)
15. PB6 (I/O) | 35. PC6 (I/O)
16. PB7 (I/O) | 36. INTA
17. GND | 37. INTB
18. A0 | 38. CLK
19. A1 | 39. CAS2
20. A2 | 40. CAS3

Functional Features

• Programmable I/O Ports: The ID82C55A provides three 8-bit ports (Port A, Port B, and Port C) that can be configured as inputs or outputs based on the desired application.
• Modes of Operation: The device offers four modes of operation (Mode 0, Mode 1, Mode 2, and Mode 3), allowing flexibility in configuring the functionality of the ports.
• Interrupt Capability: The ID82C55A supports two interrupt lines (INTA and INTB) for efficient handling of external events.
• Read/Write Control: Separate control signals (RD and WR) enable reading from and writing to the ports independently.
• Clock Input: The CLK pin provides the necessary clock signal for synchronization.

Advantages and Disadvantages

Advantages: - Versatile and flexible programmable peripheral interface. - High performance and compatibility with various microprocessors. - Easy to integrate into existing systems. - Supports interrupt-driven applications.

Disadvantages: - Limited number of I/O pins (24). - Requires careful programming to avoid conflicts between different modes.

Working Principles

The ID82C55A operates by receiving commands from a microprocessor and executing them to perform specific input/output operations. It communicates with peripheral devices through its programmable I/O ports, which can be configured as either inputs or outputs. The device can be programmed to operate in different modes, allowing it to adapt to various application requirements. It utilizes a clock signal for synchronization and supports interrupt-driven operations for efficient event handling.

Detailed Application Field Plans

The ID82C55A finds applications in various fields, including: 1. Industrial Automation: Used for interfacing with sensors, actuators, and control devices in automated systems. 2. Communication Systems: Employed in data communication interfaces for protocol conversion and signal processing. 3. Embedded Systems: Integrated into embedded systems to provide flexible I/O capabilities. 4. Test and Measurement Equipment: Utilized for data acquisition and control in test and measurement applications. 5. Robotics: Used for controlling motors, sensors, and other peripheral devices in robotic systems.

Alternative Models

• Intel 8255A
• Motorola MC6820
• Zilog Z80PIO
• National Semiconductor INS8255
• Texas Instruments SN74LS244

Note: The above list provides some alternative models that offer similar functionality to the ID82C55A. However, it is important to consult the datasheets of these alternatives for detailed specifications and pin configurations.

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