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AWR2243: the error of the ICD document of AWR2243

Liu Hao
Intellectual 330 points
Part Number: AWR2243

Hi all

When i read the ICD("mmWave-Radar-Interface-Control") document, i find the phase adjust is 16 bit width but not 6 bit

Does it is a mistake？ 

Thanks

  • 0
    TI__Mastermind 32725 points

    Hi,

    This is the LSB bit of fixed delta dither for the phase shifter. Thsi fixed delta dither is a 16 bit value hence 16 is used here. The device’s internal TX phase shifters are 6 bit. For deriving the internal 6-bit phase, the16 bit delta dither is accumulated in the firmware. The accumulator’s output is added with a number from 0 to this field’s value as per user selection. The 6 MSBs of the adder’s output are used as the internal 6 bit phase for that chirp.

    Thanks,

    Pradipta.