Hi @robertferanec, yes sure you can use it as you wish.
For anyone novice to HDMI and has the problem with the HDMI level shifter:Please first take a look at the images attached to this post.Problem
I could not get any output from my HDMI, but the current consumed by my circuit was normal.
> Question: What is my processing unit? Its actually standard Computer On Module Express (COMe) Type 10 mini, made by Kontron
> Question: What is my processor? Celeron J1900 2Mb cacheReason
I messed up with HDMI level shifter
> Question: what was my level shifter? Max9406
> Question: Why you did not follow the datasheet demo circuit? There was no such a golden bullet on the datasheet! You can find evaluation kit but I think it is still a little bit complexSoln
I developed a patch circuit to learn how to deal with HDMI level shifters ( Find the attachments). A simple 2 layers HDMI level shifter. I designed it for two chips: MAX9406 and PTN3381B. if the MAX did not work than I would have chance to test PTN. I designed it as generic as possible.
All HDMI optional paths
are provided and one can select one with zero ohm resistors. Beside this, if the circuit failed one more time, I would need a way to trace whats going on the routs with a oscilloscope. For this, I added so many unnecessary zero ohm resistors among the paths.Results
As you see on the attached images my MAX works fine!
> Question: What did I learn?
- HDMI and DVI are mapped over each other in COME type 10 mini standard. So you have to select it with AUX_SEL selection pin
- HDMI pairs are not swap-able! Be careful, otherwise you would see nothing on the screen
- HDMI differential pair length matching is not a should! it is a MUST.
- Do not forget coupling capacitors 100 nF! in some guidelines you may not see them but please keep it there in the input pins of the level shifter
Now you can see the sample output screens.
Hope it works fine for you.
Btw, The final implemented design would be available on my SyncBox project soon (with no unnecessary resistors)