ADV8005 and ADN4654 for Galvanic Isolation

Hi,

 Please let me clarify one thing, why we want to isolate TMDS interface b/w ADV8005 and ADV7482. Since ADV7482 can handle full HD format, its maximum pixel clock frequency is 162 MHz .

 ADV8005: Using External DDR only, we can support scaling in ADV8005, Since External DDR2 memory is required for motion adaptive de-interlacing, scaling(UP-Scale/Down-Scale), frame rate conversion,  and bitmap OSD overlay.

 Please refer here for Evaluation software of ADV8005 https://www.analog.com/en/products/adv8005.html#product-overview

 As per expert comment  "For evaluation of ADV8003, We should definitely use the SW driver, then if you want to port our SW driver to run on your microprocessor, you will need to do an SLA". Your ADI sales contact or distributor should be able to help with that.

Thanks,

Poornima

Hi Poornima.

This isolation is necessary to meet regulatory safety requirements (this video recording solution will be connected to electromedical equipment).

We have a working prototype where we implemented the isolation in the Pixel bus using this chain: [7842 + Isolators + TFP410 + 7482]. Due to the possibility of timing issues (channel and part-to-part skew) we plan to change to this new approach of using [7842 + 8005 + Isolator + 7482]. However, there's no BW in the isolator to handle Full HD at TMDS.

Full HD is required at the Input (since it comes from a laparoscopic camera) but not for recording. So we can downscale it by HW.

As for the external memory, pg. 104 of the HW Ref. Manual states:

"While the SVSP uses external DDR2 memory for the majority of operations, in the case of down converting from 1080p to 720p (with the same frame rate), no external memory is required and all conversions can take place in internal line
memories."

Pg. 151 also shows:

"3.3.3.4. DDR Bypass Mode
In the case where the SVSP is being used to upscale or downscale between 1080p and 720p, external DDR2 memory is not required. Internal line buffers allow the user to convert between these two resolutions while maintaining the full external memory bandwidth for both the PVSP and OSD."

We only need to convert 1920x1080p60 to 1280x720p60.

ADV8005 will be used just for this and will be either in bypass mode (when the input is already in HD) or doing this downscaling (when the input is Full HD).

Regarding SW, all we need is a couple of register configurations to put ADV8005 either in bypass or downscaling. We will use some short scripts for this and no driver is needed.

Do you see any issues? Am I missing something?

Hi,

 Yes you are right, In the case of down converting from 1080p to 720p (with the same frame rate), no external memory is required.

As per Expert comment about ADV8005 script  "You can easily change the device address in the source code.  We do not supply plain scripts for the ADV8005".

Thanks,

Poornima

Hi,

 Yes you are right, In the case of down converting from 1080p to 720p (with the same frame rate), no external memory is required.

As per Expert comment about ADV8005 script  "You can easily change the device address in the source code.  We do not supply plain scripts for the ADV8005".

Thanks,

Poornima

Hi Poornima.

Could you please explain this previous comment:

As per expert comment "For evaluation of ADV8003, We should definitely use the SW driver, then if you want to port our SW driver to run on your microprocessor, you will need to do an SLA". Your ADI sales contact or distributor should be able to help with that.

I've just downloaded this SDK:

https://sdk.analog.com/dw/sdks.aspx?file=ADVSW13

It seems the driver source code is there.

Can't I simply use it and recompile it to my processor?

Thank you.

Hi,

 Can you able to download the ADV8005 software driver without any SLA now?

Thanks,

Poornima

Hi.

Yes, as I said I've just downloaded it (minutes ago) by this link:

https://sdk.analog.com/dw/sdks.aspx?file=ADVSW13

It is ADV8005_Evaluation_Board_Software-Rel1.91.0

There's a "Src" folder showing this:

This is all I need, right?

Thanks.

Hi,

 Yes.

Thanks,

Poornima

Hi Poornima.

This document "4062.Advantiv_SW_Architecture_SpecificationsPr2.2.pdf"  (https://ez.analog.com/video/w/documents/587/adv8005-evaluation-board-software-package-documents) says:

"Please refer to RX and TX module design document and API specifications for more information on RX and TX modules compile-time and run-time configuration".

We didn't find this "RX and TX module design document and API specifications".

The folder \ADV8005_Evaluation_Board_Software-Rel1.91.0\Doc is empty.

Could you please double check if I have the right SDK and where I can access the necessary documents?
We could't compile it yet.

Thank you.

Hi,

Here Advantiv_VSP_Application_ReferencePr0.5.pdf , you can find how to compile the project in VDSP. Please crosscheck.

Thanks,

Poornima

Hi Poornima.

I had I look at the document you linked but it does't seem to be what we need.

Section 1.3 lists the following references:

Could you please help us by providing the selected ones?

Thank you.

Hi,

 Please refer below link ,

  Advantiv EVAL-ADV8005-SMZ Video Evaluation Board 

Thanks,

Poornima

Hi Poornima.

This link is where I first downloaded the SDK.

I've just checked it again and I cannot find any relevant documents.

Neither the "RX and TX module design document and API specifications" nor the last ones I asked you about (VSP driver specifications document, VSP Library specifications document and VSP command reference document).

Something is missing... There should be an easy way to get to these documents, shouldn't there?

Remember the folder \ADV8005_Evaluation_Board_Software-Rel1.91.0\Doc is empty.

Could you please ask a colleague directly involved with the driver development?

Thank you.

Hi,

Shared document only available in Engineer Zone link, remaining document and all you need to check with your local ADI sales/FAE representative team only.

Or email your inquiry to cic.asia@analog.com. They will route it to the appropriate person.

Thanks,

Poornima