What are the communication protocols of SPI, SOC and UART?

SPI (Serial Peripheral Interface), SOC (System-on-a-Chip) and UART (Universal Asynchronous Receiver-Transmitter) use different communication protocols:

SPI: SPI is a synchronous serial communication protocol for data transmission between devices over short distances.SPI module It performs full-duplex communication between a master device (usually a microcontroller or microprocessor) and a slave device (such as a sensor, memory chip, etc.). The SPI communication protocol involves four signal lines: Serial Clock (SCK), Master Send Data (MOSI), Master Receive Data (MISO), and Slave Select (SS).

SOC: SOC is not a specific communication protocol, SOC module but refers to the System-on-a-Chip (System-on-a-Chip). A SOC is an integrated circuit that integrates the various components and functions of a complete system onto a single chip, including a microcontroller or microprocessor core, memory, I/O interfaces, peripherals, and more. The SOC can communicate with external devices using a variety of communication protocols, such as SPI, I2C, UART, etc., depending on the design and support of the chip.

UART: UART is an asynchronous serial communication protocol used for point-to-point communication between devices over short distances. UART module The UART transmits data over serial, using start bits, data bits, optional parity bits, and stop bits to format the data. It is commonly used for communication between microcontrollers, and between microcontrollers and computers or other serial devices.

Summary: SPI uses a synchronous serial communication protocol, SOC is not a communication protocol but a system on a chip, and UART uses an asynchronous serial communication protocol. They each provide different communication methods and protocols in different scenarios and between devices.