Which mode of communications is faster SPI or I2C?

I2C is used only two wire for the communication, one wire is used for the data and the second wire is used for the clock. I2C is slower than SPI. In comparison to I2C, SPI is faster. I2C draws more power than SPI.

Is SPI point to point?

The Serial Peripheral Interface (SPI) Bus is an electrical engineer’s best friend. In its simplest form, it is a point-to-point interface with master/slave relationship. The signals are all uni-directional and point-to-point, which allows for simple series termination for high-speed transmission line operation.

Can Arduino use SPI and I2C together?

The interface between STM32 — Arduino is I2C and the interface between Arduino Pro Mini–ADNS3080 is SPI. I have tested the communication between the STM32 and the Arduino Pro Mini, and between the Arduino Pro Mini and the ADNS3080 sensor. Both of them work fine; I can successfully send and receive data in both cases.

What are the advantages of SPI over I2C?

While I2C’s wiring simplicity and standardization are significant advantages, SPI has some attractive features as well. 1. Communication. Separate MISO/MOSI data lines mean that it’s capable of full-duplex communication, as opposed to I2C’s half-duplex operation, meaning that data send and receive transmissions must alternate.

What is the difference between I2C SPI and UART?

Summary Protocol UART I2C SPI Complexity Simple Easy to chain multiple devices Complex as device increases Speed Slowest Faster than UART Fastest Number of devices Up to 2 devices Up to 127, but gets complex Many, but gets complex Number of wires 1 2 4

What are the limitations of the I2C protocol?

I2C protocol has some limitation for the number of slaves, the number of the slave depends on the capacitance of the I2C bus. It only provides a few limited communication speed like 100 kbit/s,400 kbit/s, etc. In I2c, devices can set their communication speed, slower operational devices can delay the operation of faster speed devices.

What is the pull-up resistor used in I2C?

I2C work on wire and logic and it has a pull-up resistor. There is no requirement of a pull-up resistor in the case of the SPI. In I2C communication we get the acknowledgment bit after each byte. Acknowledgment bit is not supported by the SPI communication protocol.