BUY P82C55A-2 https://www.utsource.net/itm/p/553533.html
Peripheral Interface
The P82C55A-2 is a CMOS Programmable Peripheral Interface (PPI) chip manufactured by OKI. It is a 40-pin DIP package. Description: The P82C55A-2 is a CMOS Programmable Peripheral Interface (PPI) chip designed for use in microprocessor-based systems. It provides a versatile interface between the microprocessor and peripheral devices such as keyboards, displays, printers, and other input/output devices. The P82C55A-2 has three 8-bit ports (A, B, and C) and one control port (D). Features: 8-bit ports A, B, and C 4-bit control port D Programmable input/output ports Programmable interrupt control Programmable timer Low power consumption High noise immunity Compatible with most microprocessors Applications: The P82C55A-2 can be used in a wide variety of microprocessor-based systems, including: Automotive systems Industrial control systems Home automation systems Robotics Security systems Medical equipment Office automation systems (For reference only)