Serial Peripheral Interface(Master) Protocol in Verilog
The Serial Peripheral Interface (SPI) is a synchronous serial communication interface developed by Motorola in around 1980s. Most of the embedded applications and short-distance communications involves with Secure Digital cards and liquid crystal displays applications. It is a full duplex mode using a Master-Slave with a single Master. The Master device originates the frame for reading and writing. Multiple slave-devices are supported through selection with individual slave select (SS), sometimes called chip select (CS), lines. Depending on the applications used it can act as four-wire serial bus, contrasting with three-, two-, and one- wire serial buses.