DS90UH948-Q1: How does the Pixel Clock vary?

user6095708

Part Number: DS90UH948-Q1
Other Parts Discussed in Thread: DS90CF388A, TFP410, DS90UH949-Q1,

I am using this IC in conjunction with DS90CF388A and then TFP410 in order to build a FPD-Link III to HDMI converter (the reverse of this DS90UH949-Q1)

I am planing to configure DS90UH948-Q1 with "2-lane FPD-Link III Input, Single Link OpenLDI Output" but since the output can range between 50 and 192 MHz and the OpenLDI receiver I found only supports frequencies up to 112MHz I am a little bit lost since I don't find any other IC that better fits my design.

I don't know if I am getting this right. I can change all the ICs I am currently planing to use if I need to.

over 5 years ago

0 Casey McCrea over 5 years ago

TI__Guru** 103215 points

Hello,

The solution you are proposing has been done before but as you noted, it is only really useful for resolutions ~720p. I am not aware of any TI solution for getting higher PCLK due to the limitation of the DS90CF388A, however there are boards that you can buy off the shelf that perform this function up to 170MHz, like this one from Westar: https://www.westardisplaytechnologies.com/products/lvds-dvi-converter-board/

Best Regards,

Casey

0 user6095708 over 5 years ago in reply to Casey McCrea

Prodigy 20 points

Hello thank you for your response,

But how can I know which frequency the DS90UH948-Q1 outputs for a given input frequency?

I am ok with 720p.

0 Casey McCrea over 5 years ago in reply to user6095708

TI__Guru** 103215 points

Hello,

I don't understand the question. 948 outputs whatever pixel clock frequency it receives from the data input at the serializer.

Best Regards,

Casey

Interface

Interface forum

DS90UH948-Q1: How does the Pixel Clock vary?