Question 1: What is the meaning of the baud rate microcontroller or computer in the serial port communication rate. Refers to the signal is modulated after the change in unit time, that is, the number of carrier parameter changes per unit time, such as the transmission of 240 characters per second, and each character format contains 10 bits (1 start bit, 1 stop bit, 8 data bits), then the baud rate of 240Bd, the bit rate of 10 bits * 240 per second = 2400bps. general modulation rate is greater than the baud rate, such as Manchester encoding). (e.g. Manchester encoding). It is a measure of the symbol transmission rate, 1 baud means 1 code symbol per second (through different modulation methods, can be loaded on a code symbol more than one bit of information), 1 bit per second means the transmission of 1 bit per second (bit). The unit "baud" itself already represents the number of modulations per second, and it is a common mistake to use "baud per second" as a unit.

Question 2: What are the serial port baud rates? There are 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 43000, 56000, 57600, 115200 standard baud.

Customize whatever you want as long as you can reach it.

Question 3: What are the serial port baud rates? There are 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 43000, 56000, 57600, 115200 standard baud.

Customize whatever you want as long as you can reach it.

Question 4: What is the meaning of the baud rate inside the microcontroller Baud rate indicates that the serial communication is fast and slow, the unit is bit/s

is the number of bits of binary data that can be transmitted in 1 second

The data in the computer are stored in binary form

A binary number is called a 1 bit (bit), which can only represent the value of 0 and 1 two values, 8 bits of binary numbers (called 1 byte). An 8-bit binary number (called a byte) can represent values ranging from 0 to 255

Question 5: What does the baud rate 9600 mean? The baud rate is in bits/s, which is binary bits per second. Because a byte is 8 bits, and a byte can usually express an ASCII code, such as an English letter, so

So: a channel with a baud rate of 9600 can theoretically transmit 9600/8 English letters of the amount of data per second, which is 1200 bytes.

Question 6: Why is the baud rate of serial communications are some strange values This is the industry's agreed standard, is determined by the hardware clock, is the basis of communication, the usual serial software support;

There is also software to support custom baud rate, such as GXi Fiber, etc., can be used to familiarize themselves with the serial communication.

Question 7: What is the meaning of the serial port baud rate of the microcomputer? Baud rate is the modulation rate of the data signal on the carrier, which is expressed in terms of the number of carrier modulation state changes per unit time.

In the information transmission channel, the signal unit carrying data information called code elements, the number of code elements transmitted through the channel per second is called the code element transmission rate, referred to as the baud rate. The baud rate is an indicator of the bandwidth of the transmission channel.

The amount of information transmitted over the channel per second is called the bit rate, or bit rate for short. The bit rate indicates the rate at which valid data is transmitted.

A port is one of the information transmission channels. The speed is slower.

Question 8: What is the baud rate of microcontroller serial communication rate of communication between the two serial ports, the baud rate of the two serial ports is set to the same in order to send and receive data from each other

Question 9: The baud rate of the serial port in relation to the actual occupation of time! 9600 that 9600 bits per second,

each byte is 8 bits, if you add a start bit, a parity bit, a stop bit,

then we need to 11 bits to transmit a word specification, the actual speed is:

9600/11 = 872.7 bytes per second

Problem 10: microcontroller serial communication, baud rate doubled! When to use? When changing the baud rate to speed up the transmission rate. But it may increase the phenomenon of data frame loss, unstable. 232 line is too long when it is not recommended to use this.