DS90CF384A: DS90CF384A

Ian Wang

Part Number: DS90CF384A
Other Parts Discussed in Thread: DS90CF384

Dear Sir,

Customer using DS90CF384A in ChiMei 4.3” Panel(480*272) but display will slope to right side. Looks like each line have extra more pixels.

It will work fine if setting H Active 550,

Here is panel parameters as below,

Here is H Sync waveform as below,

Do you have idea what happen for this issue?

Thanks, Ian.

over 7 years ago

0 Palaniappan Manickam over 7 years ago

TI__Genius 10475 points

Hello, we will review the question and make sure it gets to the right team for response.

0 Darryl Jeong over 7 years ago

TI__Expert 4210 points

12.85MHz PCLK is not pushing the limit of the DS90CF384. Are you sure the source is not the problem?

0 Ian Wang over 7 years ago in reply to Darryl Jeong

TI__Mastermind 27575 points

Dear Sir,
The input looks fine. Do you have others idea can check it?
Thanks, Ian.

0 Ian Wang over 7 years ago in reply to Ian Wang

TI__Mastermind 27575 points

Dear Sir,
May I know if you have any idea?
Thanks, Ian.

0 Ian Wang over 7 years ago in reply to Ian Wang

TI__Mastermind 27575 points

Dear Sir,

No matter 480*272 or 550*272, the screen looks no good.

Here is schematic at attach, would you pls advise what possible cause this issue?

Thanks, Ian.

PTB-4110_ZR0_P18_TTL Panel.pdf PTB-4110_ZR1_P18_TTL Panel.pdf

0 Darryl Jeong over 7 years ago in reply to Ian Wang

TI__Expert 4210 points

Actually the 12.85MHz PCLK below the minimum PCLK rating of the the device.

The minimum PCLK is 20MHz.

0 Ian Wang over 7 years ago in reply to Darryl Jeong

TI__Mastermind 27575 points

Wrong PCLK will possible cause kind of issue?

Thanks, Ian.

0 Ian Wang over 7 years ago in reply to Ian Wang

TI__Mastermind 27575 points

Dear Sir,

Do we have suggest parts can support 12.85MHz PCLK?

Thanks, Ian.

0 Ian Wang over 7 years ago in reply to Ian Wang

TI__Mastermind 27575 points

Dear Sir,

20MHz not low limit of work clock. It’s shift clock support.

0 Ian Wang over 7 years ago in reply to Ian Wang

TI__Mastermind 27575 points

Dear Sir,
Would you pls help to check it?
Thanks, Ian.

0 Ian Wang over 7 years ago in reply to Ian Wang

TI__Mastermind 27575 points

Dear Sir,
If someone can help us?
Thanks, Ian.

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DS90CF384A: DS90CF384A