DS90UH928Q-Q1: How to remove HDCP in DS90UH928

Amelie Zheng

Genius 10865 points

Part Number: DS90UH928Q-Q1

Hi Team,

My customer now is using DS90UH928 to pair DS90UB941.

How can they remove the HDCP to make compatibility to DS90UB941?

Only need to disable HDCP Debug1, HDCP Debug2 and HDCP status?

over 4 years ago

0 Steven(Shenzhen) Shi over 4 years ago

TI__Mastermind 30515 points

Amilie,

Yes, you are right, the difference just is to enable/disable HDCP function.

Rds,

Steven

0 user6215898 over 4 years ago

Prodigy 20 points

Hi:

We now want to use the test mode.

And we check the power of DS90UB941 is ok .

The mcu sent the command to Ds90UB941 with i2c is ok, the config 0x65 set 0x03 ;0x39 set 0x02, 0x64 set 0x11

The lcd with DS90UH928 is ok.

While the lcd have some snowflake.

So what's problem ?Any suggest?

Thank you.

0 Steven(Shenzhen) Shi over 4 years ago in reply to user6215898

TI__Mastermind 30515 points

you can check if the pattern has issue or not in both uh928 and ub941 side? it is always not a FPD-Link issue in this system.

btw, what is the test mode?

Regards,

Steven

0 user6215898 over 4 years ago in reply to Steven(Shenzhen) Shi

Prodigy 20 points

Hi I can't understand how to check the pattern . Does the uh928 pin27(lock) & pin28(pass) high means ok?

or just what I said test mode which from document snla132d.pdf (Exploring the Int Test Pattern Generation Feature of FPD-Link III IVI Devices).

Thank you

0 Steven(Shenzhen) Shi over 4 years ago in reply to user6215898

TI__Mastermind 30515 points

Yes, please follow up the pattern gen. app. note to run the pattern with internal clock in the uh928 and ub941as respectively, and observer how the panel displays? if the uh928 internal pattern with internal clock timing and PCLK can make the panel display well?

best regards,

Steven

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DS90UH928Q-Q1: How to remove HDCP in DS90UH928