LMK01010: Question about SPI communication

Austin Do

Expert 3275 points

Part Number: LMK01010

Tool/software:

Hello team,

What is the minimum duration required in order to communicate SPI after 3.3V power up?

Best Regards,

Austin

1 month ago

0 Michael Srinivasan 1 month ago

TI__Expert 8720 points

Hi Austin,

The minimum required duration to communicate with the device via SPI is 25ns (t_CES).

Thanks,

Michael

0 Austin Do 1 month ago in reply to Michael Srinivasan

TI__Expert 3275 points

Hi Michael,

Can you explain more detail about the specification related to minimum duration?

My question was minimum duration for SPI communication after power-up.

After 3.3V supply is stable, what is the minimum time required before communication of SPI?

Best Regards,

Austin

0 Michael Srinivasan 1 month ago in reply to Austin Do

TI__Expert 8720 points

Hi Austin,

I understand your question better now. Unfortunately, no such specification was characterized for the LMK01010. The time necessary to wait is the time it takes for the VCC line to stabilize - this depends on your power supply, but a reasonable assumption would be on the order of about 10ms.

Thanks,

Michael

0 Austin Do 1 month ago in reply to Michael Srinivasan

TI__Expert 3275 points

Hi Michael,

Thanks for reply. Well noted.

So, that kind of characterization is not done for LMK01010. Is 10ms typical for clock buffers?

Is it possible to add this specification?

Best Regards,

Austin

0 Michael Srinivasan 1 month ago in reply to Austin Do

TI__Expert 8720 points

Hi Austin,

The 10ms figure I gave you is not typical of clock buffers, per se. It is more a reflection of the typical rise time and settling time for a standard power supply. Furthermore, the 10ms figure I provided is a rough estimate - simply the amount of time I would suggest waiting.

Thanks,

Michael

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LMK01010: Question about SPI communication