What is serial peripheral interface used for?

In a computer, a serial peripheral interface (SPI) is an interface that enables the serial (one bit at a time) exchange of data between two devices, one called a master and the other called a slave . An SPI operates in full duplex mode. This means that data can be transferred in both directions at the same time.

What is an SPI transaction?

SPI is a full-duplex interface; both main and subnode can send data at the same time via the MOSI and MISO lines respectively. During SPI communication, the data is simultaneously transmitted (shifted out serially onto the MOSI/SDO bus) and received (the data on the bus (MISO/SDI) is sampled or read in).

What is the use of MOSI and MISO pins?

MOSI and MISO are master out slave in and master in slave out terminal s used in spi interface. The MOSI pin sends bits from master (another MCU) to the slave. The MISO pin is used to send bits from slave to master.

How is SPI different from other serial interface?

SPI is a high-speed, full-duplex, and synchronous communication bus; SPI is also a data exchange protocol, since SPI’s data input and output lines are independent, it allows simultaneous data input and output. Unlike ordinary serial communication, SPI allows data to be transmitted bit by bit, and even pauses.

What is miso in microcontroller?

MISO (Master In Slave Out) & MOSI (Master Out Slave In) is the data path for communication between master (programmer /downloader, USBAsp) and Slave (microcontoller IC). As the name implies, MISO is the path used to download or receive data, then MOSI is downloader path sending data to IC microcontroller.

What is SPI and IIC?

I2C is a half-duplex communication protocol. SPI is a full-duplex commination protocol. I2C has the feature of clock stretching, which means if the slave cannot able to send fast data as fast enough then it suppresses the clock to stop the communication. Clock stretching is not the feature of SPI.