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Original question:

LMX2571 - FSK modes SPI Fast / I2S

LMX2571-EP: LMX2571-EP SPI CONFIG

CAREY
Prodigy 100 points
Part Number: LMX2571-EP
Other Parts Discussed in Thread: LMX2571

Hello Team,

i see there are two SPI modes, i.e SPI Mode and SPI FAST mode
image.png

What is the difference in between SPI Mode and SPI FAST mode ? Both  SPI Mode and SPI FAST modehave Pin Config on LMX2571 EVM board ? 

Thank you 

CJI

  • 0
    TI__Guru** 111670 points

    Hi There,

    In SPI mode, we use FSK_DEV_SEL to select one of the deviations pre-set in FSK_DEVx_Fx. This mode supports up to 8-level FSK.

    In SPI FAST mode, we program FSK_DEV_SPI_FAST for the deviation we need. This mode supports arbitrary-level FSK.