Contents
How are UART, SPI and I2C interfaces used?
This article will compare the various interfaces: UART, SPI and I2C and their differences. We will be comparing them with various factors through their protocols, advantages and disadvantages of each interface, etc and we will be providing some examples of how these interfaces are being used in microcontrollers.
What kind of communication protocol does a UART use?
A simple serial communication protocol that allows the host communicates with the auxiliary device. UART supports bi-directional, asynchronous and serial data transmission. It has two data lines, one to transmit (TX) and another to receive (RX) which is used to communicate through digital pin 0, digital pin 1.
How is the I2C protocol used in embedded systems?
The I2C protocol is also used for two-wire interface to connect low-speed devices like microcontrollers, EEPROMs, A/D and D/A converters, I/O interfaces and other similar peripherals in embedded systems. How does it work? It has 2 Lines which are SCL (serial clock line) and SDA (serial data line acceptance port)
Which is better, I2C protocol or SPI protocol?
However, the tradeoff for this simplified wiring is that it is slower than SPI. The I2C protocol is also used as a two-wire interface to connect low-speed devices like microcontrollers, EEPROMs, A/D and D/A converters, I/O interfaces and other similar peripherals in embedded systems. How does it work?
Can a 3 wire SPI interface be used with total phase?
Some chips use a half-duplex interface similar to true SPI, but with a single data line. Interfaces like this are commonly called “3-wire SPI” and can be used with Total Phase SPI products with some simple circuit modifications.
How to connect the RTC module to the Arduino?
Connect your Real Time Clock module to your Arduino as in the schematics below. Working with the RTC requires two important steps: retaining the time, so that the RTC always gives the correct time, even when it is turned off For setting the current time you need to change the code provided.
Is there a separate specification for the SPI bus?
Unlike I²C, it is hard to find a formal separate ‘specification’ of the SPI bus – for a detailed ‘official’ description, one has to read the microcontrollers data sheets and associated application notes.