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LMH1297: SPI ready time is needed?

Masaaki MURAI
Prodigy 170 points
Part Number: LMH1297

Hello,
There is  SM Bus ready time after POR in the datasheet. How about SPI?

I'm using SPI interface. After 40ms from POR, I initiate device initialization through SPI, but not reflected in LMH1297.

After 100ms from POR, it works well.
Is there any restriction in SPI ready time?

Best Regards,

Murai

  • 0
    TI__Guru* 92780 points

    Greetings Murai,

    SPI ready time is the same as SMBus interface - about 16 to 20ms after power up. SPI needs clock shifting through the register and therefor it requires more time. However, this parameter has not been characterized.

    Regards, Nasser