DS90UB947-Q1: Shaking issue on video screen output

Hi Jeffrey,

Thanks for reaching out to us. When you see the flickering issue, this often time due to the timing that you input to the device. You need to review video timing parameters if you enter correctly such as front, back, sync, total of horizontal and vertical. If there is min, typical, and max value available for the video timing, I would just start off with typical, and make any adjustment if needed.

Hope this helps. Let me know if you have further questions.

Aaron

Hi Aaron,

Thanks for your support. I had already attached the register setup of 947 and 948. Is it ok? or Is there any corrections? 

Also, I'll review the video timing parameters as you said. I'll ask you more questions if I have same or additional issues.

Regards, Jeffrey

Hi Aaron,

I'd like to explain more details on this issue. Original circuit configuration of SerDes was 927 and 948. There was no video output issue on these SerDes configuration. But this video output issue came out when serializer had been changed from 927 to 947. So, I think that the root cause is not video timing but other part. Please refer to my comments.

Regards, Jeffrey

Hi Jeffrey,

Did you go through the initialization section in 947 datasheet?

Aaron

Hi Aaron,

Do you mean that the initialization section is recommended power sequencing in page 71 of datasheet? and Is the register setup ok?

Regards, Jeffrey

Hi Jeffrey,

I would like to take offline. Can you reach out to your local TI sale and ask them to reach out to me? I would like to share some documents with you.

Aaron

Hi Aaron,

Let me contact to my local TI sales or FAE and then ask them to reach out to you. Thanks for your some documents in advance.

Regards, Jeffrey

Hi Jeffrey,

Thank you. I see the local field office connecting us. I provided you the documents. Please kindly review those, and implement per suggestion.

Aaron

Hi Aaron,

Thanks for your support. Please check my reply mail and let me know that.

Regards, Jeffrey

Hi Jeffrey,

I will close this ticket, and take it offline.

Aaron