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DLPC410: DCLKIN specification

user6181058
Prodigy 110 points
Part Number: DLPC410
Other Parts Discussed in Thread: DLP650LNIR

Hello,

I would like to ask about DCLKIN specification for DLPC410.

According to the latest datasheet, the DCLKIN should be set 400MHz.

However, according to DLPC410 datasheet revB, the value can be changed from 200MHz to 400MHz.

[Question]

1) Would you please tell me the reason why the specification was changed ?

2) If user set the DCLKIN to 350MHz, does any problem occur ?

[Background]

My customer developed their board using DLPC410 over 5 years ago, but the DCLKIN was set to 350MHz.

Therefore, they would like to know about the above questions.

Best Regards,

Koike

  • 0
    TI__Mastermind 43165 points

    Hello Koike-san,

    Welcome to the DLP section of the TI-E2E forums.

    The design was designed originally for operation from 200 - 400 MHz.  Later review of the testing suggested that it had not been well validated over the entire range.  If the customer design is working at 350 MHz with no issues, I see no reason to change it.

    HOWEVER,  If they have changed to the DLPR410A which supports the DLP650LNIR DMD, the FPGA code was changed and is designed to operate at 400 MHz.  If this PROM is used at 350 MHz there is no guarantee that it will work it was only tested at 400 MHz.

    I hope this helps.

    Fizix

  • 0 in reply to Fizix
    Prodigy 110 points

    Hello Fizix-san,

    Thank you for your answer.

    I understand the reason why the specification was changed, but I could not find the description in the latest datasheet.

    Would you please point out the corresponding section in the datasheet.

    Best Regards,

    Koike

  • 0 in reply to user6181058
    Prodigy 110 points

    Hello Fizix-san

    I would like to add a question.
    DLPR410 is EOL, so my customer should change to DLPR410A.
    From your advice, I understand that the customer need to change the DCLKIN to 400MHz.
    Is my understanding correct?

    Best Regards,
    Koike

  • 0 in reply to user6181058
    TI__Mastermind 43165 points

    Hello again Koike-san,

    Your understanding is correct.  

    Fizix