A part of my project is to convert RS-422 port input to USB 2.0/3.0 input. The main problem with RS-422 is that it is very slow in data transfer. So i am trying to convert that port to usb port so that i could get higher transfer rates.I cannot get that speed by employing a usb to rs-422 connector. An idea or some kind of solution is very much appreciated.

 

RS-422 and USB are incompatible. It is like trying to make a pig fly.
You need to provide more information.
Where is the RS-422 port?
What is the baud?
What information is transmitted?

Where is the USB?

 

RS-422 and USB are incompatible. It is like trying to make a pig fly.
You need to provide more information.
Where is the RS-422 port?
What is the baud?
What information is transmitted?

Where is the USB?

please understand that i m just a noob in these things.
using MCU with the rs-422 is required. we have to transfer data from usb to a system where there was an rs-422 port before.

 

please understand that i m just a noob in these things.
using MCU with the rs-422 is required. we have to transfer data from usb to a system where there was an rs-422 port before.

The slowest data rate in the system will be the fastest it can go. You can use a USB RS-422 dongle but it will never be faster than the data on the RS-422 connection.

You could buffer the data on an MCU, then transfer it faster but the net result of this would be ultimately slower as the overhead of store and forward would be added.

Why do you want the data faster than the RS-422 connection? What are you actually doing? We need more information to help.

 

As Yaakov points out, a USB-to-RS-422 dongle does not turn an RS-422 port into USB. It turns the USB port into RS-422.

Your data rate will be the rate of the RS-422.

Where is the RS-422 port?

 

rs-422 max is 10 Mbits/s.

 

As Yaakov points out, a USB-to-RS-422 dongle does not turn an RS-422 port into USB. It turns the USB port into RS-422.

Your data rate will be the rate of the RS-422.

Where is the RS-422 port?

well i actually want to turn the data transfer in a MCU from rs-422 protocol to usb protocol in a system.
the current MCU used is atmel atmega 2560. this mcu has to be changed to achieve the desired usb protocol.
is there any available mcu which supports usb protocols and is from atmel because i don't want to change the entire programming.
for your info the system is used in aviation purpose.

 

There are MCUs that talk USB directly.

Most if not all MCUs talk UART or USART protocol. That is what your RS-422 is using. You do not need RS-422. This is a voltage level protocol. You can skip the RS-422 and go straight UART.

Now you can use a CP2102 USB-to-UART bridge.
This does not turn the UART into USB. It turns the USB port on your PC into a COM port.
Now you need the software on your PC to read a COM port, not a USB port.

If this is not clear, ask questions.
Sorry, I am not at a computer and typing is difficult.