AWRL6844: Serializer/Deserialzier LVDS to MIPI CSI II

Dusan Vojinovic

Intellectual 290 points

Part Number: AWRL6844

Tool/software:

Hello TI Support,

I'm looking for a solution serialzier/ deserializer to transmit an convert data form LVDS to MIPI CSI II interface.

Please see attached picuture.

Do you have any suggestions as to which components are possible for this combination?

Regards,

Dusan

7 months ago

0 Kristien Everett 7 months ago

TI__Genius 13286 points

Hey Dusan,

Thanks for posting your question regarding a serializer/deserializer. It looks like your attached image didn't show up. Could you attempt to send it again in a follow up reply? One of our hardware engineers will get back to you once we have more context.

Regards,

Kristien

0 Dusan Vojinovic 7 months ago in reply to Kristien Everett

Intellectual 290 points

Hi Kristien, attached you will find the image.

Thanks and regads,

Dusan

0 Voona Deexith 7 months ago in reply to Dusan Vojinovic

TI__Expert 4190 points

Hi Dusan,

In AWRL6844, LVDS interface is intended for debugging and development purposes, not for production use. Could you please confirm whether this SERDES request is intended for production use or not?

Best Regards,
Deexith.

0 Dusan Vojinovic 7 months ago in reply to Voona Deexith

Intellectual 290 points

Hello Deexith,

yes, we'll use this interface for development purpose.

Regards,

Dusan

0 Voona Deexith 7 months ago in reply to Dusan Vojinovic

TI__Expert 4190 points

Hi Dusan,

Thanks for the confirmation. Please find below the Serializer and Deserializer portfolio:

Serializer portfolio for LVDS to FPD-link 3 LVDS can be found here
Deserializer portfolio for FPD-link 3 LVDS to MIPI CSI-2 can be found here.

Best Regards,
Deexith.

0 Dusan Vojinovic 7 months ago in reply to Voona Deexith

Intellectual 290 points

Hi Deexith,

we're using the DS90UB954 deserializer. Is this device compatible with your suggested serializer DS90UB947?

Regards

Dusan

0 Nikolas Antonucci 7 months ago in reply to Dusan Vojinovic

TI__Mastermind 21515 points

Hi Dusan,

The UB954 deserializer is an ADAS device, so it will not be compatible with the UB947 serializer (IVI device).

If you'd like to continue using the UB954 as your deserializer, I'd recommend looking into the UB933 or UB913A as potential options. Note, however, that these are not LVDS serializers, but rather parallel data in serializers, so they may require a third party adapter to convert from LVDS to parallel. If these options are not viable and/or you cannot find a suitable adapter, there may not be the appropriate ADAS part in our portfolio that matches the system requirements.

Otherwise, if you are open to using both a new serializer and new deserializer from our IVI portfolio, the UB947 LVDS can be paired with a UB940 CSI deserializer. See below for their corresponding data sheets:

947 SER: https://www.ti.com/lit/ds/symlink/ds90ub947-q1.pdf

940 DES: https://www.ti.com/lit/ds/symlink/ds90ub940-q1.pdf

Best,

Nikolas

0 Voona Deexith 7 months ago in reply to Nikolas Antonucci

TI__Expert 4190 points

Hi Nicolas,

I want to highlight that the LVDS output data from our AWRL6844 radar device is not the standard LVDS signal format. The AWRL6844 radar device output signals format is shown in the below image. Please confirm if the below format is supported by your recommended SERDES combinations.

Best Regards,
Deexith.

0 Nikolas Antonucci 7 months ago in reply to Voona Deexith

TI__Mastermind 21515 points

Hi Deexith,

I'm not familiar with the AWRL6844 device - can you elaborate on this LVDS format? It looks like there is only four bits of data, but two separate CLK signals?

Best,

Nikolas

0 Voona Deexith 7 months ago in reply to Nikolas Antonucci

TI__Expert 4190 points

Hi Nikolas,

The AWRL6844 LVDS output format is two lanes of differential data (LVDS_TXP0, LVDS_TXM0, LVDS_TXP1 and LVDS_TXM1) and two lanes of differential clock (LVDS clock and LVDS frame clock) and LVDS valid.

Best regards,
Deexith

0 Nikolas Antonucci 7 months ago in reply to Voona Deexith

TI__Mastermind 21515 points

Hi Deexith,

It's difficult to say which FPD-Link devices (if any) are appropriate here without knowing more details regarding the AWRL6844 output. Are all bits (both lanes of data, both clocks, and LVDS valid) outputted at all times?

I am redirecting this thread back to the sensors team for additional input as this device is outside my area of expertise. Once we have additional information regarding this device, we can continue to look at potential FPD-Link options.

Best,

Nikolas

0 Voona Deexith 7 months ago in reply to Nikolas Antonucci

TI__Expert 4190 points

Hi Nikolas,

If you are asking that both lanes of LVDS data and both LVDS clocks are outputted at the same time for AWRL6844 device then the answer is yes.

Best Regards,
Deexith.

0 Gil Abarca Ramos 7 months ago in reply to Voona Deexith

TI__Genius 13390 points

Hi Voona,

It seems based on previous discussion that we are working with a non standard LVDS input to the SERDES. Our FPD-Link devices only support standard LVDS menaing our serializer uses up to 8 differential data inputs and one clock signal. If it is required to use the device both LVDS clock our SERDES would not help becuase they will only take one LVDS clock. We also have the DS90Ux927-Q1 but it also has 1 LVDS clock input.

Best Regards,

Gil Abarca

0 Voona Deexith 6 months ago in reply to Gil Abarca Ramos

TI__Expert 4190 points

Hi Dusan,

As Gil mentioned, AWRL6844 SoC LVDS is not the standard LVDS structure (LVDS is partially serialized on the L6844 device to save the number of debug pins). And there is no corresponding serializer that can work in this configuration. Hope this helps!

Best Regards,
Deexith.

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AWRL6844: Serializer/Deserialzier LVDS to MIPI CSI II