MC6821P ,Peripheral Interface Adapter (PIA), DIP-40, 8-Bit Data Bus, Programmable Control Registers

The Motorola MC6821P Peripheral Interface Adapter (PIA) is a robust and highly configurable IC designed to bridge data communication and control between a microprocessor and peripheral devices. Originally developed to work with the Motorola 6800 microprocessor family, the MC6821P offers versatile connectivity and control options for complex data-driven applications. This IC features a bidirectional 8-bit data bus that allows seamless data flow between the microprocessor and peripherals, making it ideal for applications in computing, instrumentation, automotive systems, and more.

The MC6821P also incorporates individually programmable interrupt inputs for responsive data and control management. With four interrupt lines, it allows real-time signal handling from multiple peripherals, a feature that is essential for applications requiring precise and immediate responses to external events.

Key Features :

• Bidirectional 8-Bit Data Bus: Facilitates communication between the MPU and peripherals with high efficiency.
• Two Programmable Control Registers: Offers flexible control, allowing each peripheral line to function as an input or output.
• Two Programmable Data Direction Registers: Provides control over the data flow direction, making it suitable for input or output tasks.
• Four Individually Controlled Interrupt Input Lines: Supports individual or simultaneous interrupts, ideal for responsive peripheral device control.
• Compatible with TTL and CMOS Logic: Ensures compatibility with various circuit designs and signal levels.
• Versatile Interface for Control Applications: Designed for use in computing, automotive, and instrumentation applications.