CS82C55A

Product Overview

• Category: Integrated Circuit
• Use: General Purpose Programmable Peripheral Interface
• Characteristics: Versatile, Flexible, Easy to Use
• Package: 40-pin DIP (Dual In-line Package)
• Essence: A programmable peripheral interface chip that provides parallel I/O capabilities for microprocessor-based systems.
• Packaging/Quantity: Available in tubes or trays, typically sold in quantities of 25 or more.

Specifications

• Operating Voltage: 5V
• Number of I/O Ports: 3
• Bit Width per Port: 8 bits
• Modes of Operation: Mode 0, Mode 1, Mode 2
• Interrupt Capability: Yes
• Clock Frequency: Up to 8 MHz
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The CS82C55A has a total of 40 pins. Here is the 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. A0 - Address Bit 0
27. A1 - Address Bit 1
28. A2 - Address Bit 2
29. RD - Read Control
30. WR - Write Control
31. CS - Chip Select
32. RESET - Reset Input
33. CLK - Clock Input
34. INT - Interrupt Output
35. VCC - Power Supply (5V)
36. NC - No Connection
37. NC - No Connection
38. NC - No Connection
39. NC - No Connection
40. VCC - Power Supply (5V)

Functional Features

• Provides three 8-bit parallel I/O ports (Port A, Port B, and Port C).
• Supports three modes of operation: Mode 0 (Basic Input/Output), Mode 1 (Strobed Input/Output), and Mode 2 (Bidirectional Bus).
• Offers interrupt capability for efficient handling of external events.
• Can be easily programmed to meet specific application requirements.
• Compatible with a wide range of microprocessors.

Advantages and Disadvantages

Advantages: - Versatile and flexible I/O capabilities. - Easy to program and integrate into microprocessor-based systems. - Supports interrupt-driven operations for efficient event handling. - Wide operating temperature range allows for use in various environments.

Disadvantages: - Limited number of I/O ports compared to some other programmable peripheral interface chips. - Requires external components for certain functionalities, such as clock generation.

Working Principles

The CS82C55A is a programmable peripheral interface chip that acts as an intermediary between a microprocessor and external devices. It provides parallel I/O capabilities, allowing the microprocessor to communicate with various peripherals.

The chip can be programmed to operate in different modes, depending on the specific requirements of the application. In Mode 0, it functions as a basic input/output device, where data is transferred directly between the microprocessor and the I/O ports. In Mode 1, strobed input/output is used, where data transfer occurs only when a strobe signal is received. Mode 2 enables bidirectional bus operation, allowing data to be transferred in both directions simultaneously.

The CS82C55A also supports interrupt-driven operations, allowing the microprocessor to respond quickly to external events. When an interrupt condition is detected, the chip generates an interrupt signal to notify the microprocessor, which can then handle the event accordingly.

Detailed Application Field Plans

The CS82C55A can be used in various applications