The Mitsubishi M82C55AFP2 is a programmable peripheral interface (PPI) chip designed to interface microprocessors with external devices. This versatile chip provides a flexible means of connecting various input/output (I/O) devices to a microprocessor system, enabling control and communication with peripherals. It is functionally equivalent to the Intel 8255A.

Applications

• Parallel data transfer
• Keyboard interface
• Printer interface
• Motor control
• Instrumentation and control systems
• Industrial automation
• Embedded systems

Features

• Three 8-bit I/O ports (Port A, Port B, Port C)
• Programmable modes of operation
• Bit set/reset capability for Port C
• Simple interface to microprocessors
• TTL compatible inputs and outputs
• Single +5V power supply
• 2.5 MHz Clock Frequency

Benefits

• Flexible I/O configuration to meet diverse application requirements
• Simplified peripheral control and data transfer
• Reduced component count and system cost
• Easy integration into microprocessor-based systems
• Improved system performance through efficient I/O handling
• Versatile functionality

Additional Details

The M82C55AFP2 operates with a single +5V power supply and is TTL compatible, making it easy to interface with a wide range of microprocessors and digital logic devices. The chip's three 8-bit I/O ports can be individually configured as inputs or outputs, providing a high degree of flexibility in system design. Port C also features bit set/reset capability, allowing individual bits to be controlled independently.

The M82C55AFP2 offers three programmable modes of operation: Mode 0 (Basic Input/Output), Mode 1 (Strobed Input/Output), and Mode 2 (Bidirectional Bus). Mode 0 provides simple input/output operations, while Mode 1 supports handshake signals for synchronized data transfer. Mode 2 allows bidirectional data transfer using Port A and handshake signals on Port C.

The chip is typically programmed through a control register, which configures the modes of operation for each port. The control register is accessed by writing to a specific address within the microprocessor's memory map. Once programmed, the M82C55AFP2 can operate independently, freeing the microprocessor to perform other tasks.

The M82C55AFP2 is a reliable and versatile PPI chip that provides a flexible means of interfacing microprocessors with external devices. Its programmable modes of operation, bit set/reset capability, and TTL compatibility make it a valuable component for a wide range of applications.