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LMK05318: About LMK05318

Intellectual 280 points

Replies: 5

Views: 55

Part Number: LMK05318

Hello,

1.If I select HW_SW_CTRL = 0: EEPROM + I2 C Mode (Soft pin mode),but no e2prom on board, Can I set registers by I2C after power-on?

2.If  I select HW_SW_CTRL = 1: ROM + I2C Mode (Hard pin mode),TI datasheet has a description---

" All register pages in the ROM image can be factory-set in hardware (mask ROM) and are not software programmable. "

This mean the ROM image set by TI factory and I cann't modify the ROM image?

In my now design,no e2prom is on board. So only ROM+i2c mode is ok?

Thank!

  • Genius 12550 points

    Hi Wenxiang,

    You can write to registers via I2C in both options (HW_SW_CTRL = 0 or 1). In other words, EEPROM or ROM, it only means what to load upon power up. After powerup, you can write any configuration to the device via I2C. If you plan to use one of the ROM pages, then set HW_SW_CTRL = 1. Otherwise, set it to 0.

    Regards,
    Hao

    Clock and Timing Systems & Applications

    To view training videos on Clock and Timing Solutions please visit  TI Precision Labs ​​​​

    More information Clock and Timing System products: http://www.ti.com/clock-and-timing/overview.html

  • In reply to Hao Z:

    Hi hao,

    Thank you!

    Is the e2prom  on-chip e2prom,not external e2prom?

  • Genius 12550 points

    In reply to wenxing zheng:

    Yes it is on-chip EEPROM.

    Regards,
    Hao

    Clock and Timing Systems & Applications

    To view training videos on Clock and Timing Solutions please visit  TI Precision Labs ​​​​

    More information Clock and Timing System products: http://www.ti.com/clock-and-timing/overview.html

  • In reply to Hao Z:

    Hello,

    Our design requirements are in the attachment.

    Two 25MHz 3.3V LVCMOS input clcok, three 25MHz 3.3V LVCMOS output and one  10MHz 3.3V LVCMOS output.

    What is  clock solution applicable for this design req? I feel LMK05318 is not OK for the req.

    Could you help to recommend it?

  • Genius 12550 points

    In reply to wenxing zheng:

    Hi Wenxing,

    I'm closing this ticket since there's a duplicated questions on another thread.

    Regards,
    Hao

    Clock and Timing Systems & Applications

    To view training videos on Clock and Timing Solutions please visit  TI Precision Labs ​​​​

    More information Clock and Timing System products: http://www.ti.com/clock-and-timing/overview.html

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