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PPI – Programmable Peripheral Interface Knowledge of 8255 essential for students in the 8255 PPI has three 8-bit ports. • Port A (PA). • Port B (PB). communication between the 8255A and the CPU. The 8255A is a programmable peripheral interface. (PPI) device designed for use in Intel microcomputer systems. 8255 - PROGRAMMABLE PERIPHERAL INTERFACE (PPI ). The Intel 8255 (or i8255) Programmable PeripheralInterface (PPI) chip is a peripheral. An 8-digit LED display interfaced to an 8088 microprocessor through 8255A. Digit transistor switch controlled by Port B bit. RESET. -A “HIGH” on this pin clears the control word register and all ports (A,B,C) are set to input mode. Page 4. PPI Chip: 8255A. Prepared by: SUBIR DAS. PPI8255 Datasheet PDF – Parallel Data Transfer dual in The Intel 8255 (or i8255) Programmable Peripheral Interface (PPI) chip modes of operationPROGRAMMABLE PERIPHERAL. INTERFACE (PPI) -8255. • 8255 is a general purpose programmable device used for data transfer between processor and I/O devices. The Intel 82C55A is a high-performance CHMOS version of the industry standard 8255A general purpose programmable I O device which is designed for use with

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