CP82C55AZ

Product Overview

• Category: Integrated Circuit
• Use: General Purpose Programmable Peripheral Interface
• Characteristics: Versatile, programmable, high-speed interface
• Package: 40-pin DIP (Dual Inline Package)
• Essence: Provides a flexible and customizable interface for connecting peripheral devices to a microprocessor or microcontroller
• Packaging/Quantity: Available in tubes or trays, quantity varies based on supplier

Specifications

• Supply Voltage: 5V ±10%
• Operating Temperature: 0°C to 70°C
• Input/Output Voltage: TTL compatible
• Maximum Clock Frequency: 8 MHz
• Number of I/O Ports: 24
• Interrupt Capability: Yes
• Timer/Counter Channels: 3
• Modes of Operation: Mode 0, Mode 1, Mode 2, Mode 3

Detailed Pin Configuration

The CP82C55AZ has a total of 40 pins. Here is the detailed pin configuration:

1. A0 - Address Bus Bit 0
2. A1 - Address Bus Bit 1
3. A2 - Address Bus Bit 2
4. A3 - Address Bus Bit 3
5. A4 - Address Bus Bit 4
6. A5 - Address Bus Bit 5
7. A6 - Address Bus Bit 6
8. A7 - Address Bus Bit 7
9. RD - Read Control
10. WR - Write Control
11. CS - Chip Select
12. RESET - Reset Input
13. GND - Ground
14. D0 - Data Bus Bit 0
15. D1 - Data Bus Bit 1
16. D2 - Data Bus Bit 2
17. D3 - Data Bus Bit 3
18. D4 - Data Bus Bit 4
19. D5 - Data Bus Bit 5
20. D6 - Data Bus Bit 6
21. D7 - Data Bus Bit 7
22. INT - Interrupt Output
23. TC0 - Timer/Counter 0 Output
24. TC1 - Timer/Counter 1 Output
25. TC2 - Timer/Counter 2 Output
26. GND - Ground
27. VCC - Power Supply (5V)
28. PA0 - Port A Bit 0
29. PA1 - Port A Bit 1
30. PA2 - Port A Bit 2
31. PA3 - Port A Bit 3
32. PA4 - Port A Bit 4
33. PA5 - Port A Bit 5
34. PA6 - Port A Bit 6
35. PA7 - Port A Bit 7
36. PB0 - Port B Bit 0
37. PB1 - Port B Bit 1
38. PB2 - Port B Bit 2
39. PB3 - Port B Bit 3
40. PB4 - Port B Bit 4

Functional Features

• Versatile I/O Ports: The CP82C55AZ provides 24 I/O ports that can be programmed as inputs or outputs, allowing for flexible interfacing with peripheral devices.
• Interrupt Capability: It supports interrupt-driven data transfer, enabling efficient communication between the microprocessor and peripherals.
• Timer/Counters: The integrated timer/counters offer precise timing and counting capabilities, useful in various applications such as event measurement and frequency generation.
• Mode Selection: The CP82C55AZ offers four different modes of operation, allowing customization based on specific requirements.

Advantages and Disadvantages

Advantages

• Flexibility: The CP82C55AZ's programmable nature allows for customization and adaptation to different system requirements.
• High-Speed Interface: With a maximum clock frequency of 8 MHz, it can handle data transfer at a fast rate.
• Interrupt Capability: The interrupt feature enables efficient handling of time-critical events.

Disadvantages

• Limited I/O Ports: Although the CP82C55AZ provides 24 I/O ports, in some cases, this may not be sufficient for complex systems requiring numerous peripheral connections.
• Compatibility: The TTL-compatible voltage levels may not be suitable for all applications, requiring additional level-shifting circuitry.

Working Principles

The CP82C55AZ acts as an interface between a microprocessor or microcontroller and peripheral devices. It communicates with the microprocessor through address, data, and control lines. The microprocessor can program the CP82C55AZ to configure its I/O ports, set up timers/counters, and enable interrupts. The peripheral devices connected to the CP82C55AZ can then exchange data with the microprocessor based on the programmed settings.

Detailed Application Field Plans

The CP82C