Waveshare display Mini-HDMI to VGA cable pinout

1

Hi all,

I was needed Waveshare display mini-HDMI to VGA cable pinout ,

Since in India that cable non stock for more than 5 months and I can’t able to use that function

Does any one have it please help me to prepare an custom cable for my unit.

Thanks in advance

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Unfortunately, this is not a passive pin-to-pin mini-HDMI to VGA cable. HDMI and VGA are electrically incompatible:

  • HDMI is digital TMDS signaling.

  • VGA is analog RGB with separate syncs.

So, what Waveshare ships is a mini-HDMI to VGA converter (tiny active electronics inside the molded connector). That’s why you can’t just make a cable by wiring mini-HDMI pins to VGA pins — the signals don’t match. The converter chip (often a CH7101 or similar HDMI to VGA bridge) does all the work.

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Hiya @Eswaran303023 and welcome to the forum,

Could I please confirm do you need the mini-HDMI to VGA Male cable or were you after the Pin Out Diagrams for the cable?

If for the former, Core Electronics does sell a Mini-HDMI to VGA Converter. It looks like it would require a lead time to get shipped however.

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I was not sure on this

When you look on the display spec it was mentioned as Supports vga input on mini HDMI connector,

I think VGA port does carry any supply for conversion like HDMI,

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Hi thanks for the welcome,

I need the cable or its pinout diagram.

But Cable not possible in my region, since we have issue with USD payment, there is no buyable option in rupees.

And I have checked all over for that cable pinout , didn’t found any clue , so that come to put here, if anyone has that cable / pinout details

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i Eswaran
If you google “Waveshare display mini-HDMI to VGA cable” you will get quite a number of hits rom vendors with pricing in Euros. This might suit you better than $US.

Although I find it strange that you can’t purchase in $US . If you have a PayPal or similar account the conversion is done for you.
Cheers Bob

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Hi Robert,

Actually there is limitations on my office on the purchase.

So only this much complications,

I can’t go for other payments except rupees.

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Hi Eswaran

Well you will have to find an outlet in India.
Or as you requested the wiring information and make one if you can get the connectors.
Cheers Bob

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Hi @Eswaran303023,

The best I can offer after extensive searching is just general information.

Mini-HDMI Pin Out:

image
image774×882 29.6 KB

VGA Pin Out:

image
image749×1067 128 KB

And the General Idea of the Conversion:

image
image435×301 31.2 KB

Hope this is at least a little helpful.

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Oh and this design for a converter.

HDMI-to-VGA (HDMI2VGA) Converter Block Diagram

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Hi,

Thanks for the input

I have teardown the display mini HDMI to RTD2662 IC ,

Connections are made as below,

R0+ → VGA Pin 1 (Red)

G0+ → VGA Pin 2 (Green)

B0+ → VGA Pin 3 (Blue)

AHS0 → VGA Pin 13 (HSync)

AVS0 → VGA Pin 14 (VSync)

All VGA grounds (Pins 5, 6, 7, 8, 10) → tie to board’s AGND, and also to R0−/G0−/B0− pins of RTD2662

I will get connectors and made custom cable and tell feedback.

Thanks for the support

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Wonderful, glad I was able to help. Let us know how it goes. :slight_smile:

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Several years ago I tried a HDMI to VGA converter to use my old VGA screen with a Raspberry Pi. It did work … sort of … but the quality was not good, and it did not take long to convince me to buy a HDMI monitor. I tried a second converter, but the result was the same.

Hopefully the products sold by Core Electronics, and the circuit given above, use newer components which give a better result … but I suggest you buy a HDMI screen instead. At least you should have no trouble buying one in India.

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