So sánh i2c và spi
This page compares UART vs SPI vs I2C interfaces and mentions difference between UART, SPI and I2C in tabular format. It provides comparison between these interfaces based on various factors which include interface diagram, pin designations, data rate, distance, communication type, clock, hardware and software complexity, advantages, disadvanatages etc. Show
UART InterfaceFollowing are the features of UART interface. • The full name is Universal Asynchronous Receiver/Transmitter. • UART supports lower data rate. • Receiver need to know baudrate of the transmitter before initiation of reception i.e. before communication to be established. • UART is simple protocol, it uses start bit (before data word), stop bits (one or two, after data word), parity bit (even or odd) in its base format for data formatting. Parity bit helps in one bit error detection. ➨UART Packet = 1 start bit(low level), 8 data bits including parity bit, 1 or 2 stop bit(high level) • Data is transmitted byte by byte. • UART generates clock internally and synchronizes it with data stream with the help of transition of start bit. • It is also referred by RS232 . • For long distance communication, 5V UART is converted to higher voltages viz. +12V for logic 0 and -12V for logic 1. • The figure-1 depicts UART interface between two devices.• Refer difference between UART vs USART >>. SPI InterfaceAs shown in the figure one slave is connected with one master device. Clock is generated by master device for synchronization of data transfer. It is also possible to connected more than one slave device with single master for communication. SPI interface operates in either half or full duplex mode. SPI is the short form of Serial Peripheral interface. The figure-2 depicts SPI interface between master and slave devices. It has four main lines as described below. MOSI - Master Output Slave Input, it is used to transfer data from master device to slave device. MISO - Master Input Slave Output, it is used to transfer data from slave device to master device. SCLK - Serial Clock, it is clock output from master and used for synchronization. SS - Slave Select, it is used by master device to select one slave out of multiple slaves. It inserts active low signal to select the particular slave device. I2C Interface• I2C stands for "inter-IC bus". It is also used as I2C for simplicity. • I2C is a low speed and two wire serial data connection bus used in IC(Integrated Circuit). • It is used to run signals between ICs mounted on the same PCB (Printed Circuit Board). • It uses only two lines between multiple masters and multiple slaves viz. SDA (Serial Data) and SCL (Serial Clock). • I2C supports various data rates as per versions from 100 Kbps, 400 Kbps, 1 Mbps to 3.4 Mbps • It is synchronous communication like SPI and unlike UART. Hence there is common clock signal between masters and slaves. • It uses start and stop bits and ACK bit for every 8 bits of data transfer. The figure-3 depicts UART interface between master and slave devices. Also refer difference between I2C vs I2S >>. Tabular difference between UART, SPI and I2CLet us compare UART vs SPI vs I2C and summarize difference between UART, SPI and I2C in tabular format.
what is difference between
difference between UART vs SPI vs I2C RF and Wireless TerminologiesDuới đây là các thông tin và kiến thức về chủ đề giao tiếp i2c và spi hay nhất do chính tay đội ngũ chúng tôi biên soạn và tổng hợp: 1. Giao Tiếp I2C Là Gì - Giới Thiệu Chuẩn Giao Tiếp I2C
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