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Products => Computers => Embedded Computing => Topic started by: Lockon Stratos on April 22, 2020, 11:55:12 am

Title: Thecus N4520 UART
Post by: Lockon Stratos on April 22, 2020, 11:55:12 am

Hi all.

So i got this box on the cheap and trying to get into the bios(intel atom cpu and it has hdmi) to try and get something more modern onto it instead of the thecusos from 2017.... It has a populated uart it sends data out on it:
https://www.dropbox.com/s/wkoasxsh4sst1xb/IMG_20200422_123510.jpg?dl=0 (https://www.dropbox.com/s/wkoasxsh4sst1xb/IMG_20200422_123510.jpg?dl=0)

What kind of adapter i need for this? I have a small ttl to usb but its only godd for 5 and 3.3 V.

Thanks in advance :) .

Title: Re: Thecus N4520 UART
Post by: ivi_yak on April 30, 2020, 01:11:33 am

regular FT232

Title: Re: Thecus N4520 UART
Post by: TomS_ on April 30, 2020, 07:45:45 am

If I'm reading that right, it looks like about 10V at peak, so your existing adapters will be no good.

Also that signal would appear to be idling low, whereas UARTs tend to idle high. It may not be a standard serial port.

You could try grabbing a MAX232 and hook it up to convert the levels back down to 5V for example, but you may then also need to invert those signals, assuming it is a standard UART.

edit: Just noticed the ground marker on the left in the middle of the waveform, so actually that would appear to be idling high, and you can use any standard "RS-232" adapter.

Title: Re: Thecus N4520 UART
Post by: Lockon Stratos on May 24, 2020, 07:00:03 pm

(https://i.ibb.co/4KBtq9b/ty.gif) (https://imgbb.com/)
Sorry for the late reply but im in the middle of the exam period. Ill try a standard serial after it ends, it will still need some work to figure out where the rx pin is.