Bare Metal: Baud rate and bit rate

Source: Internet
Author: User

Using the serial port often see the term baud rate, often based on it to adjust the serial port clock.

However, the baud rate is not strictly reflect the serial port transmission rate (clock frequency), in fact, the bit rate can directly reflect the signal transmission rate (clock frequency), Baidu found the answer:

Bit rate:

The amount of information transmitted through the channel per second is called the bit transfer rate, which is the number of bits transmitted per second, or bit rate. Bit rate indicates the transfer rate of valid data, with B/s, bit/s, bit/sec, read: bits per second.

Baud rate

The baud rate reflects the number of data elements transmitted per second. For example, the common serial port, the data is usually transmitted through such a frame: 1bit starting bit (0) + 8bit data bit + 1bit end bit (1). the data element here is byte (8bit data), if our serial baud rate is 115200, it means we can transmit 115,200 bytes per second.

The bit rate should be 115200* 10 at this time.

The unit "baud" itself is already representing the number of modulation per second, with "baud per second" (Baud per second) unit is a common error.

The relationship between baud rate and bit rate can also be converted to: bit rate = Baud rate * The number of bits for a single modulation state.

Bare Metal: Baud rate and bit rate

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.