IS82C55A

Product Overview

Category

IS82C55A belongs to the category of integrated circuits (ICs).

Use

The IS82C55A is commonly used as a programmable peripheral interface in various electronic devices.

Characteristics

• Programmable: The IS82C55A can be programmed to perform different functions based on specific requirements.
• Versatile: It supports multiple modes of operation, including input, output, and bidirectional modes.
• High Compatibility: The IS82C55A is compatible with a wide range of microprocessors and microcontrollers.
• Low Power Consumption: It operates efficiently with low power consumption.
• Reliable: It offers reliable performance and stability in diverse applications.

Package

The IS82C55A is typically available in a 40-pin dual in-line package (DIP).

Essence

The essence of the IS82C55A lies in its ability to provide flexible and customizable input/output capabilities for electronic systems.

Packaging/Quantity

The IS82C55A is usually packaged individually and is available in various quantities depending on the manufacturer's specifications.

Specifications

• Supply Voltage: 5V
• Operating Temperature Range: -40°C to +85°C
• Maximum Clock Frequency: 8 MHz
• Number of I/O Ports: 24
• Number of Control Lines: 3
• Data Bus Width: 8 bits

Detailed Pin Configuration

The IS82C55A has a total of 40 pins. Here is a detailed pin configuration:

1. PA0 (Port A, Bit 0)
2. PA1 (Port A, Bit 1)
3. PA2 (Port A, Bit 2)
4. PA3 (Port A, Bit 3)
5. PA4 (Port A, Bit 4)
6. PA5 (Port A, Bit 5)
7. PA6 (Port A, Bit 6)
8. PA7 (Port A, Bit 7)
9. GND (Ground)
10. PB0 (Port B, Bit 0)
11. PB1 (Port B, Bit 1)
12. PB2 (Port B, Bit 2)
13. PB3 (Port B, Bit 3)
14. PB4 (Port B, Bit 4)
15. PB5 (Port B, Bit 5)
16. PB6 (Port B, Bit 6)
17. PB7 (Port B, Bit 7)
18. PC0 (Port C, Bit 0)
19. PC1 (Port C, Bit 1)
20. PC2 (Port C, Bit 2)
21. PC3 (Port C, Bit 3)
22. PC4 (Port C, Bit 4)
23. PC5 (Port C, Bit 5)
24. PC6 (Port C, Bit 6)
25. PC7 (Port C, Bit 7)
26. RD (Read)
27. WR (Write)
28. CS (Chip Select)
29. A0 (Address Bit 0)
30. A1 (Address Bit 1)
31. A2 (Address Bit 2)
32. VCC (+5V Power Supply)
33. RESET (Reset)
34. XTAL1 (Crystal Oscillator Input)
35. XTAL2 (Crystal Oscillator Output)
36. CLK (Clock)
37. INTA (Interrupt Acknowledge)
38. INTB (Interrupt Request)
39. INTC (Interrupt Control)
40. GND (Ground)

Functional Features

The IS82C55A offers the following functional features:

• Three 8-bit I/O ports (Port A, Port B, and Port C)
• Programmable modes of operation for each port (input, output, or bidirectional)
• Interrupt capability with three interrupt lines (INTA, INTB, and INTC)
• Read and write control lines (RD and WR) for data transfer
• Chip select line (CS) for device selection
• Address lines (A0, A1, and A2) for selecting internal registers

Advantages and Disadvantages

Advantages

• Versatile and customizable I/O capabilities
• High compatibility with various microprocessors and microcontrollers
• Reliable performance and stability
• Low power consumption

Disadvantages

• Limited number of I/O ports (24 in total)
• Requires external crystal oscillator for clock generation

Working Principles

The IS82C55A operates based on the principles of digital logic. It receives commands and data from the microprocessor or microcontroller through the address and data bus. The control lines (RD, WR, and CS) are used to initiate read or write operations. The selected port can be configured as input or output based on the mode set by programming the internal registers.