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AWR1642BOOST-ODS: TIDA-020011 TIDA-01570 I2C LP87702DRHBRQ1

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Replies: 5

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Part Number: AWR1642BOOST-ODS

I notice that both these reference designs connect I2C pins of the AWR1642 to the voltage regulator LP87702DRHBRQ1.

As the software for these designs haven't been made public yet, can you please provide me with the relevant  parts of the code for the I2C operation. Or atleast let me know what is the logic used to enable the lp87702 buck boost converter. The standard AWR1642BOOST doesn't use these I2C pins. 

  • Hello Krishna,

    Please refer to the I2C driver in the MMWAVE-SDK for the I2C read and write functions.

    Let me know if you need any further information.

    -Raghu
  • In reply to Raghunandan Kamath:

    Hello Raghu

    I think my question wasn't correctly phrased. I don't need information about how to program I2C using mmwave. What I require is, in this particular design the I2C is used to connect to an on board voltage regulator LP87702DRHBRQ1 to enable buck boost. I need this startup shutdown sequence which is sent from AWR1642 to the regulator using I2C.
  • In reply to Krishna Kumar4:

    Hi Krishna,
    Please refer this similar thread and datasheet for this PMIC.
    e2e.ti.com/.../2848218
    www.ti.com/.../lp87702-q1.pdf


    This PMIC uses default OTP and on this board currently AWR1642 is not sending any command over i2c to change the sequence. But wait till concern expert will update you about i2c startup/shutdown sequence.


    Regards,
    Jitendra

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  • In reply to Jitendra Gupta:

    just pinging for an update
  • In reply to Jitendra Gupta:

    Hi Krishna,

    LP87702 regulator will be enabled by set NRST and EN1 high. No need to I2C controlling. I2C will be needed if some setups need to be changed after OTP read. 

    When NRST and EN1 = high, OTP read takes approximately 1.2ms after that following startup and shutdown times are valid with the LP87702DRHBRQ1 device

    This device has delay setting 0-15ms, so the farther behind values are valid (2ms, 3ms, 3ms, 2ms, 4ms, 1ms)

    Regards,

    Tuomo

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