DS90UH941AS-Q1: How is it different from DS90UB941AS

Roy Hsu

Part Number: DS90UH941AS-Q1

Hi Team,

DS90UH941AS-Q1 and DS90UB941AS-Q1 seem to be pin-to-pin compatible but how are they different from each other? Are they interchangeable?

Thanks!

Roy

over 4 years ago

0 Hamzeh Jaradat over 4 years ago

TI__Guru** 108100 points

Hello Roy,

these are exactly the same hardware. The difference is the device with H does support HDCP, and the device with B does not support HDCP.

If you are not using HDCP in your system, then yes, they are interchangable.

0 Roy Hsu over 4 years ago in reply to Hamzeh Jaradat

TI__Genius 9390 points

Hi Jaradat,

Thanks for the reply! My customer actually designed their system with DS90UB941AS + DS90UB028Q; however, due to supply shortage of DS90UB941AS, they were looking for a replacement and hence my original question.

Now, they also want to know if DS90UH941AS can be paired with DS90UB928Q without additional verification, as they've already done it in their original design? Or does DS90UH941AS need to be paired with DS90UH928Q?

Thanks!

Roy

0 Hamzeh Jaradat over 4 years ago in reply to Roy Hsu

TI__Guru** 108100 points

Hello Roy,

As I said earlier, the Hardware is same. So, you can pair them together. But you need to make sure you are not enabling HDCP in the UH941AS device.

0 Roy Hsu over 4 years ago in reply to Hamzeh Jaradat

TI__Genius 9390 points

Hi Jaradat,

To disable HDCP in the UH941AS, do I just set bit 7, bit 3 and bit 1 in register 0xC3? Is there anything else that needs to be changed as well?

Thanks!

Roy

0 Hamzeh Jaradat over 4 years ago in reply to Roy Hsu

TI__Guru** 108100 points

Hello Roy,

As you can see, all default values in register 0xC4 and 0xC3 are 0. This means HDCP is not active by default. But if for some reason you have activated it and need to disable it, then yes, you need to set the bits 0xC3[3] and 0xC3[1] = 1.

Interface

Interface forum

DS90UH941AS-Q1: How is it different from DS90UB941AS