SPI

SPI (Serial Peripheral Interface) is a communication protocol used to communicate between devices. Both devices share a common clock signal leading to synchronized communication.

There are four wires:

• MOSI (Master Out Slave In) - sends data from master to slave
• MISO (Master In Slave Out) - sends data from slave to master
• SCLK (Serial Clock) - provides the clock signal
• SS/CS (Slave Select/Chip Select) - selects the slave device

Characteristics:

• Synchronous

Pros:

• Faster than UART
• Supports multiple slave devices

Cons:

• Requires more wires than UART, messy