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MD8255A/B

MD8255A/B - Programmable I/O Interface

Inventory:4,493

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Overview of MD8255A/B

The MD8255A/B is a versatile Programmable Peripheral Interface (PPI) IC that provides three 8-bit bidirectional I/O ports. It offers a flexible interface for connecting external devices to a microprocessor system and can be programmed for various modes of operation as needed.

Pinout

(Note: The pin configuration below is a general representation. Refer to the specific datasheet for precise details.)

  • PA0-PA7: Port A bidirectional I/O lines
  • PB0-PB7: Port B bidirectional I/O lines
  • PC0-PC7: Port C bidirectional I/O lines
  • CD: Control Port/Status Port selection pin
  • WR: Write control signal
  • RD: Read control signal
  • A0-A15: Address lines for selecting internal registers
  • CS: Chip select signal
  • VCC: Positive power supply
  • GND: Ground connection

Circuit Diagram

Include a circuit diagram illustrating the connections and operation of the MD8255A/B IC for a visual representation.

Key Features

  • Three 8-Bit I/O Ports: Provides versatile I/O capabilities with three separate 8-bit ports for data transfer.
  • Programmable Modes: The MD8255A/B can be programmed for different modes such as I/O, Strobed I/O, and BSR modes to suit various applications.
  • Control and Status Ports: Includes control and status ports for efficient communication and monitoring of device operation.
  • High Compatibility: Compatible with a wide range of microprocessor systems for seamless integration.
  • Flexible Operation: Offers flexibility in interfacing with external devices and peripherals based on user-defined configurations.

Note: For detailed technical specifications, please refer to the MD8255A/B datasheet.

Application

  • Input/Output Expansion: Ideal for expanding the I/O capabilities of microprocessor-based systems.
  • Parallel Data Transfer: Used for parallel data transfer between the microprocessor and external devices.
  • Control Interface: Suitable for creating control interfaces for various electronic systems.

Functionality

The MD8255A/B serves as a flexible interface between a microprocessor and external devices, allowing for seamless data transfer and control operations. It enhances the I/O capabilities of a system while providing programmable features for custom applications.

Usage Guide

  • Programming: Configure the MD8255A/B registers according to the desired mode of operation and I/O requirements.
  • Data Transfer: Utilize the three I/O ports to transfer data between the microprocessor and external peripherals.
  • Control Signals: Use the control and status ports for managing communication and device operation.

Frequently Asked Questions

Q: Can the MD8255A/B be used with multiple microprocessors simultaneously?
A: The MD8255A/B is designed for interfacing with a single microprocessor and may require additional logic for use with multiple processors concurrently.

Q: What is the power supply range for the MD8255A/B?
A: The MD8255A/B operates within a typical power supply range of +5V to +12V for proper functionality.

Equivalent

For similar functionalities, consider these alternatives to the MD8255A/B:

  • Intel 8255A: A compatible programmable peripheral interface IC from Intel, offering similar I/O capabilities.
  • Zilog Z8470: This is a versatile parallel input/output controller with programmable features for interfacing with microprocessors.

Specifications

The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

last_inspection_date 18 APR 2023 rohs_version 2011/65/EU, 2015/863
supplier_cage_code 3V146 htsusa 8542390001
schedule_b 8542390000

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MD8255A/B

MD8255A/B - Programmable I/O Interface

Inventory:

4,493