LMH0340: Support Request: HD-SDI Interface Using i.MX8M Plus LVDS Outpu

Samudralankaiah

The LMH0340/0040/0070/0050 SDI Serializers are part of TI’s family of FPGA-Attach SER/DES products supporting 5-bit LVDS interfaces with FPGAs as shown below.

So you need to make sure the i.MX8M output can support this type of format and resolution. You will also need to make sure the I.MX8M can provide SMPTE 424 or other SMPTE protocol.

Thanks

David

Hi Sir,

I reviewed the i.MX8M Plus Reference Manual and could not find any information indicating support for the SMPTE 424 standard or other SMPTE protocols for the display interface.

While researching possible implementation options, I came across the attached architecture for an HD-SDI display interface.

Could you please review the attached architecture and let me know if it would be suitable for our HD-SDI display interface requirement? Alternatively, would it be necessary to use a dedicated FPGA along with the i.MX8M Plus to implement the HD-SDI interface and support the required video processing/protocol conversion?

I would appreciate your guidance on the recommended architecture so that we can proceed with the design accordingly.

Thank you.

Best regards,
Samudralankaiah Jampani

Dear Sir,

Thank you for your response.

If implementing three HD-SDI outputs using the proposed approach is not possible or recommended, could you please review the attached architecture and let us know whether it is a feasible solution for implementing the HD-SDI interface with the i.MX8M Plus processor?

We would appreciate your feedback and any recommendations you may have.

Thank you for your support.

Best Regards,
Samudralankaiah Jampani

Samudralankaiah

You can use FPGA such as noted below on top of your i.MX6 processor. Here is the link to different FPGA and example IP for this application: www.ti.com/.../broadcast_video_serdes_ip.

Thanks

David

Dear Team,

Thank you for your response.

Unfortunately, using an FPGA is not a feasible option for our design due to certification requirements, additional cost, and physical space constraints.

Could you please recommend any discrete IC that is compatible with the i.MX8M Plus LVDS controller for HD-SDI conversion?

We have identified the following serializer ICs, which specify ANSI/TIA/EIA-644-A compliant LVDS inputs, indicating that they appear to be electrically compatible with the i.MX8M Plus LVDS interface.

However, we have some concerns regarding the LVDS video format compatibility. While the electrical interface appears to match, we are not certain whether the LVDS video output format (such as data mapping, bit ordering, timing, and lane configuration) from the i.MX8M Plus is compatible with these serializer ICs.

Could you please review the list of ICs below and let us know whether any of them are compatible with the i.MX8M Plus LVDS output? If not, we would appreciate your recommendation for a suitable discrete IC that can directly interface with the i.MX8M Plus LVDS controller.

Thank you for your support. We look forward to your guidance.

Best regards,

Samudralankaiah Jampani

Samudralankaiah 

I can only speak for TI SDI Serializer as I am not familiar with Semtech solution. 

For TI SDI serializer, LMH0040/0050/0340/0341 devices are all FPGA assisted SDI serializer/deserializers. FPGA must be used to enable SDI video framing and compatibility.

Thanks

David