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AWR2243: What's impact that a change of the combination of PMIC (LP87524)s and AWRs[1/2/3/4] on the custom RF board (follows MMWCAS-RF-EVM)?

user5243633
Intellectual 360 points
Part Number: AWR2243
Other Parts Discussed in Thread: MMWCAS-DSP-EVM, MMWCAS-RF-EVM

I try to use the combination of the MMWCAS-DSP-EVM and the custom RF board which almost follows MMWCAS-RF-EVM' s pattern.

The custom RF board is changed antenna patterns and  the combination of PMIC (LP87524)s and AWRs[1/2/3/4].

Original version:

PMIC1 -> AWR1 and AWR4

PMIC2 -> AWR2 and AWR3

 

My version:

PMIC1 -> AWR1 and AWR2

PMIC2 -> AWR3 and AWR4

 

What's impact?

MMWAVE studio doesn't work?

or Even PROCESSOR SDK doesn't work?

or no problem?

Actually MMWAVE studio doesn't work. I investigate the cause.

I'm afraid that if PMIC's power management are sophisticated, PMIC controls power at every transmission and reception,

so MMWAVE studio’s DFP firmware controls the timing of PMIC1 on the assumption that PMIC1 connects AWR1 and AWR4

and the timing of PMIC2 on the assumption that PMIC2 connects AWR2 and AWR3.

  • 0
    TI__Guru 58035 points

    Hello ,

    Using PMIC1 -> AWR1 and AWR2 and PMIC2 -> AWR3 and AWR4 is not an issue. It should not have any impact.

    You need to make sure you use the same buck 1/2/3/4 configuration in each of the PMIC as in MMCAS_RF_EVM design.

    Regards,
    Vivek

  • 0 in reply to Vivek Dham
    Intellectual 360 points

    Thank your reply. Based on your Information I understand it’s at least OK in the case that I use 4 AWR chips.

    Just to be sure. If I use just 1 AWR chip in mmwave studio, should I aware the circuit configure of PMIC and AWR ?

    It means “should I change ar1.PowerOn_mult() setting according to the circuit configure of PMIC and AWR?”

     

    If a radarAPI controls power switch on AWR chip and a radarAPI doesn’t control PMIC, I understand don’t care of my circuit configure of PMIC and AWR.

  • 0 in reply to user5243633
    TI__Guru 58035 points

    Hello ,

    By default we are not doing any communication to the PMIC. It just powers up in the default state when power supply is provided and we don't change anything.

    ar1.PowerOn_mult() and other APIs are only to the AWR device and not to the PMIC.

    Regards,

    Vivek 

  • 0 in reply to Vivek Dham
    Intellectual 360 points

    I understand 100%. Thanks.