How to change DMD Interface clock speed on DLPC350?

Daniel Shen

Prodigy 80 points

Other Parts Discussed in Thread: DLPC350

Hi,

Right now we make our own DLP control board & DMD FPC, but:

original DLP control board + our FPC: image stable

our DLP control board + original FPC : image stable

our DLP control board + our FPC: image NOT stable :(

our FPC's length is about 5cm, a little longer than original FPC (total length is longer than design constraint )

So, i want to reduce the FPC clock rate from 120M to 80M.

The "dlps029a.pdf" says i can (Table 13. DMD Interface Timing Requirements)

but i cant find out the configuration register in "dlpu010b.pdf"

So my question is how to change the DMD FPC clock rate? or any binary code update?

We need 5cm+ FPC for our design.

Thank You!

Daniel

over 11 years ago

0 Sanjeev over 11 years ago

TI__Mastermind 30875 points

Hello Daniel,

The DMD to DLPC350 DMD CLK signal is fixed and not possible to change via I2C configuration control register.

We would certainly make note of your request and get back to you with further details.

Regards,

Sanjeev

0 Daniel Shen over 11 years ago in reply to Sanjeev

Prodigy 80 points

Thanks, Sanjeev!

So the DMD clock can be configured by boot binary file?

Thank You!

Daniel

0 Sanjeev over 11 years ago in reply to Daniel Shen

TI__Mastermind 30875 points

Hello Daniel,

I am not sure I understand your question. Do you mean can DMD clock be configured by changing the DLPC350 firmware file? The option to change the DMD clock is not available for direct control. However we keep in mind about your query, in short your presumption is by decreasing the DMD clock if it is possible to extend the Flat Panel Cable beyond 5cm +.

Regards,

Sanjeev

0 Daniel Shen over 11 years ago in reply to Sanjeev

Prodigy 80 points

Hi Sanjeev,

We need to make sure the DMD clock can be slow down in any way. So if we can't modify the clock, we should tell our mechanical engineer to modify their design to 3cm- ASAP.

Thanks a lot,

Daniel

0 Sanjeev over 11 years ago in reply to Daniel Shen

TI__Mastermind 30875 points

Hello Daniel,

Apologies for delay in response from ourside. Our suggestion right now would be to follow the TI reference design since we have not experimented ourself with slowing down the DMD clock and use higher length cable.

Regards,

Sanjeev

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How to change DMD Interface clock speed on DLPC350?