How fast is serial port

To view the currently configured serial console speed, and the default speed for that model of Exinda appliance:. After changing the serial console speed, you must reboot the appliance to ensure that all areas of the system recognize the new speed. All Files. CLI: Serial Console Speed The following table details the effect of the serial speed on the parts of the system that use the serial console.

Boot menu or The boot menu will operate at the configured baud rate. To get these speeds you need to compile the kernel with special patches or use modules until support is built into the kernel's serial driver. Unfortunately serial port manufacturers never got together on a standard way to support high speeds, so the serial driver needs to support a variety of hardware.

The software will then use a divisor of 1 to set the highest speed. All this will hopefully be supported by the Linux kernel sometime in A non-standard way that some manufacturers have implemented high speed is to use a very large number for the divisor to get the high speed.

This number isn't really a divisor at all since it doesn't divide anything. It's just serves as a code number to tell the hardware what speed to use. In such cases you need to compile the kernel with special patches. One patch to support this second type of high-speed hardware is called shsmod Super High Speed Mode. There are both Windows and Linux versions of this patch. Using it may result in buffer overflow.

For internal modems, only a minority of them advertise that they support speeds of over Does shsmod support these?? On the other hand, USB ports were designed for high-speed data transfer between a single port and one or more peripherals or attached devices. That said, USB ports offer several advantages over serial ports ; we will discuss those advantages and benefits below. Here are some of the benefits that USB ports have over serial ports:. A traditional serial port is capable of mov ing data at speeds of 1Mbps to 10 Mbps, whereas USB Type C can transfer data at speeds of up to 10, Mbps a whopping x increase in speed.

USB Gen 1 is capable of transferring data at speeds of up to 12 Mbps, which is still much faster than serial ports, and USB Gen 2 is capable of transferring data at speeds of up to Mbps. USB 3. That said, USB 3. Also, it is important to mention that all generations of USB Type - A are cross-compatible with a nother. For example, if you plug a USB 3. This is so because even though they are compatible, you are limited by USB 2.

Ultimately, USB ports have become the standard port for consumer-grade uses and industrial applications because there was a need for a communication port that offered increased bandwidth. For example, machine vision cameras and fingerprint readers are not possible with legacy serial ports. This is so because they require bandwidth that exceeds that offered by serial ports.

As such, industrial computers can be configured with both USB and Serial COM ports for communication with both legacy and new technologies. The legacy serial ports can be used to connect to older automation devices or sensors, while modern equipment such as high-resolution cameras can be connected via USB ports.

The second advantage that USB ports have over serial ports is that they are capable of delivering power via USB, whereas Serial ports are not capable of providing power. That said , USB 1. At "best" neither of the devices will get to send their data.

At worst, both device's transmit lines go poof though that's rare, and usually protected against. It can be safe to connect multiple receiving devices to a single transmitting device.

Not really up to spec and probably frowned upon by a hardened engineer, but it'll work. Distributing a TX line like this can still be dangerous from a firmware perspective, because you can't pick and choose which device hears what transmission. The LCD will end up receiving data not meant for it, which could command it to go into an unknown state. See our Engineering Essentials page for a full list of cornerstone topics surrounding electrical engineering.

Take me there! With this shiny, new knowledge of serial communication, there are loads of new concepts, projects, and technologies to explore. Would you like to learn more about other communication standards? Maybe something synchronous? Check out the following communication protocols. Need Help? Mountain Time: Shopping Cart 0 items. Product Menu. Today's Deals Forum Desktop Site. All Categories.

Development Single Board Comp. Contributors: jimblom. Introduction Embedded electronics is all about interlinking circuits processors or other integrated circuits to create a symbiotic system. Parallel vs. Serial Parallel interfaces transfer multiple bits at the same time. Binary is the numeral system of electronics and programming But, what is binary? How does it translate to other numeral systems like decimal? Favorited Favorite This tutorial covers the concept of analog and digital signals, as they relate to electronics.

An overview of component circuit symbols, and tips and tricks for better schematic reading. Click here, and become schematic-literate today! A brief history of how ASCII came to be, how it's useful to computers, and some helpful tables to convert numbers to characters. Rules of Serial The asynchronous serial protocol has a number of built-in rules - mechanisms that help ensure robust and error-free data transfers.

These mechanisms, which we get for eschewing the external clock signal, are: Data bits, Synchronization bits, Parity bits, and Baud rate. Baud Rate The baud rate specifies how fast data is sent over a serial line. Framing the data Each block usually a byte of data transmitted is actually sent in a packet or frame of bits.

Wiring and Hardware A serial bus consists of just two wires - one for sending data and another for receiving. UARTs The final piece to this serial puzzle is finding something to both create the serial packets and control those physical hardware lines.

I'd like to leave you with a few common mistakes that are easy for an engineer of any experience level to make: RX-to-TX, TX-to-RX Seems simple enough, but it's a mistake I know I've made more than a few times. Interested in learning more foundational topics? Resources and Going Further With this shiny, new knowledge of serial communication, there are loads of new concepts, projects, and technologies to explore.

SPI is commonly used to connect microcontrollers to peripherals such as sensors, shift registers, and SD cards. An introduction to I2C, one of the main embedded communications protocols in use today. In addition to all the usual features it has on-board CAN and RS ports enabling quick and easy interfacing to a multitude of industrial devices. Favorited Favorite 9. Comments 9 View Paginated Print.