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Understanding I2C, SPI, and UART Serial Communication

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Understanding I2C, SPI, and UART Serial Communication

1.I2C: Inter-Integrated Circuit, abbreviated as I2C Bus. I2C mainly distinguishes slave devices through addresses, and its communication principle is relatively simple. 2.SPI: Serial Peripheral Interface, a common serial synchronous communication protocol widely used in applications. 3.UART: Universal Asynchronous Receiver/Transmitter, a serial, asynchronous, full-duplex communication protocol. GIF source from https://www.parlezvoustech.com/en/comparaison-protocoles-communication-i2c-spi-uart/ Follow the WeChat public account “Embedded … Read more

Comprehensive Introduction to UART, SPI, and I2C Protocols

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Comprehensive Introduction to UART, SPI, and I2C Protocols

I2C Communication Protocol Basics 3.1 Communication Overview I²C (Inter-Integrated Circuit) is a serial communication bus designed by Philips in the early 1980s. It facilitates communication between motherboards, embedded systems, or mobile phones and peripheral devices. Due to its simplicity, it is widely used for communication between microcontrollers and sensor arrays, displays, IoT devices, EEPROMs, etc. … Read more

Understanding UART, I2C, SPI, and Other Communication Protocols

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Understanding UART, I2C, SPI, and Other Communication Protocols

UART, I2C, RS485… These communication protocols are commonly used, but their explanations can be ambiguous. I feel it’s necessary to organize them to consolidate and differentiate. The article is a bit long, so I suggest saving it for later reference. UART stands for Universal Asynchronous Receiver-Transmitter. The UART port refers to a type of physical … Read more

Introduction and Comparison of CAN, I2S, I2C, SPI, and SSP Buses

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Introduction and Comparison of CAN, I2S, I2C, SPI, and SSP Buses

1. SPI BusThe Serial Peripheral Interface (SPI) bus technology was introduced by Motorola and is a synchronous serial interface. Most MCUs (Microcontrollers) produced by Motorola, such as the 68 series MCUs, are equipped with SPI hardware interfaces. SPI is used for full-duplex, synchronous serial communication between the CPU and various peripheral devices. SPI can simultaneously … Read more

Realistic Animation Demonstration of I2C, SPI, and UART Communication

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Realistic Animation Demonstration of I2C, SPI, and UART Communication

So far, protocols like I2C, SPI, and UART remain the most commonly used communication protocols in electronic embedded devices. This article will dissect these three protocols, providing a clear and intuitive understanding of their functions, advantages, and limitations, accompanied by GIF animations. 1. I2C Protocol I2C is a serial communication protocol commonly used to connect … Read more

Understanding Communication Protocols: I2C, SPI, and UART

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Understanding Communication Protocols: I2C, SPI, and UART

So far, I2C, SPI, and UART are still the most commonly used communication protocols in electronic embedded devices. In this article, we will analyze these three protocols to help everyone clearly and intuitively understand their functions, advantages, and limitations, supplemented with GIF animations. I2C Protocol I2C is a serial communication protocol commonly used to connect … Read more

Understanding SPI, I2C, UART, I2S, GPIO, SDIO, and CAN

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Understanding SPI, I2C, UART, I2S, GPIO, SDIO, and CAN

Bus Buses are everywhere. Signals in this world are the same, but there are thousands of buses, which can be quite confusing. In general, there are three types of buses: internal buses, system buses, and external buses. Internal buses connect various peripheral chips with the processor within a microcomputer; system buses connect plug-in boards with … Read more

I2C vs SPI: A Technical Comparison

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I2C vs SPI: A Technical Comparison

Recently, there have been discussions in the WeChat group about I2C. Since we are talking about I2C, it’s necessary to mention SPI as well, so let’s discuss both. If anyone has better insights, please leave a comment to let more people know your views. 整理与网络，侵删 Should I2C and SPI Compete? Nowadays, in the field of … Read more

Understanding I2C, UART, and SPI Serial Interfaces

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Understanding I2C, UART, and SPI Serial Interfaces

Basic Theoretical Knowledge i. Parallel Communication/Serial Communication ii. Asynchronous Communication/Synchronous Communication iii. Half-Duplex Communication/Full-Duplex Communication i. Parallel Communication/Serial Communication Parallel communication: Fast transmission speed, transmitting 8 bits at once, but high communication costs, requiring 8 independent channels. It does not support long-distance transmission. Used in devices such as printers and scanners, for example, the DB-25 … Read more

Common Interfaces in Embedded Development

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Common Interfaces in Embedded Development

In embedded development, interfaces such as UART, I2C, and RS485 are commonly used. Understanding them may be ambiguous, so this article organizes them. The article is lengthy, with an estimated reading time of about 10 minutes. UART (Universal Asynchronous Receiver-Transmitter) The UART port refers to a type of physical interface (hardware). UART is an asynchronous, … Read more