DESIGN A MASTER-SLAVE SPI CORE COMMUNICATION WITH PHERIPHERAL CHIPS

Abstract

Serial Peripheral Interface (SPI) is a widely used synchronous communication protocol for high-speed data transfer between a master device and one or more slave peripheral chips. This paper presents the design and implementation of a Master-Slave SPI core aimed at efficient communication with multiple peripheral devices such as sensors, EEPROMs, and ADCs. The proposed SPI core supports configurable clock polarity (CPOL), clock phase (CPHA), and flexible data widths, making it adaptable for diverse embedded applications.
The master SPI core generates the clock signal and controls communication using chip select lines, while the slave core responds to commands and exchanges data accordingly. The design is implemented using hardware description languages (HDL) such as Verilog/VHDL and can be synthesized on FPGA platforms. Emphasis is placed on optimizing timing, reducing latency, and ensuring reliable data transfer.
The system architecture includes shift registers, control logic, clock generation units, and buffering mechanisms. Peripheral chips are interfaced through dedicated chip select signals, allowing scalable expansion. The communication protocol ensures full-duplex transmission, enabling simultaneous sending and receiving of data