• State Resolved
  • Locked Locked
  • Replies 4 replies
  • Subscribers 33 subscribers
  • Views 267 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Original question:

DS320PR1601: GEN 5.0 REDRIVER

DS320PR1601: GEN 5.0 REDRIVER

SHEKHA SHOUKATH
Intellectual 300 points
Part Number: DS320PR1601
Other Parts Discussed in Thread: CDCDB800

Hi,

1 a)If we use SM bus for programming the redriver(DS320PR1601) instead of EEPROM, where will be the data saved?

    b)Don't we need to program every time we turn on the add in card module?

2 Similarly for clock buffer CDCDB800, we can enable the clk out either by enabling the SMB enable bit(OUT_EN_CLK) or via OE# hardware pins.

    a)If I intend to use SM Bus register instead of hardware pins, will the register setting retain after power off?

Thanks and Regards,

Shekha Shoukath

  • 0
    TI__Guru* 93670 points

    Greetings,

    I can answer the first question. We can assign this to the clock and timing group to respond to the 2nd question.

    As long as we do not turn power off to the card, then register content changed by SMBus interface will be saved. Even when we enable PD(Power Down ) pins changes in register content are saved. 

    Regards, Nasser

  • 0 in reply to Nasser Mohammadi
    TI__Genius 12420 points

    Hi Shekha,

    SHEKHA SHOUKATH said:

    2 Similarly for clock buffer CDCDB800, we can enable the clk out either by enabling the SMB enable bit(OUT_EN_CLK) or via OE# hardware pins.

        a)If I intend to use SM Bus register instead of hardware pins, will the register setting retain after power off?

    Most TI clock buffers including the CDCDB800 do not have nonvolatile storage, so if SMBus control is used then the register settings would not be retained after the buffer loses power. I happen to be quite familiar with clock and timing products but in the future it's best to create separate threads for clocking parts to get the best possible support, because they are managed by another product line. We have reassigned this thread to them in case they have other comments.

    Best,

    Evan Su

  • 0 in reply to Nasser Mohammadi
    Intellectual 300 points

    Hi,

    If the redriver is programmed via SM Bus register, will the data be saved in these registers if we turn off the power of add in card?

    Is this for this reason in DS320PR1601EVM , EEPROM used?

    Thanks and Regards,

    Shekha Shoukath

  • 0 in reply to SHEKHA SHOUKATH
    TI__Guru* 93670 points

    Greetings,

    1). Register settings will be lost when power is turned off.

    2). Using MODE pin and EEPROM register settings will  be automatically restored after the power comes back on.

    Regards, Nasser