The Serial Peripheral Interface (SPI) is a bus system for a serial synchronous data transmission between different integrated circuits.The bus consists of a) 3 lines MOSI (Master Out –> Slave In) / MISO (Master In <– Slave Out)- one common line, SCLK -(Serial Clock, output from master) and SS – Slave Select (active low; output from master) or b) 4 lines MOSI (Master Out –> Slave In), MISO (Master In <– Slave Out), SCLK -(Serial Clock, output from master) and SS – Slave Select (active low; output from master).

By these signal lines the master selects the slave for communication. With supply voltage of 5V ±10% output signal of SPI is provided. Dual channel SPI output is also available. Full duplex with 4 wire or half duplex with 3 wire are available. Dual channel SPI output is also available. 5V or 3.3V SPI outputs are available.

SPI Interface is available in following mechanical features :