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IWR1443: Power up and programming the PMIC

Constantine Fanourakis
Prodigy 10 points
Part Number: IWR1443

I'm working on a project utilizing the IWR1443 on a custom board. The LP87524 quad buck converter is being used as in the EVM. The I2C interface of the converter is connected to a PIC24F

1. Does the PMIC need to be configured to be compatible with the radar chip?

2. What is the power up sequence for the IWR1443 chip?

3. Is there any configuration code/instructions available (specific to the radar, aside from what's in the datasheet)?

Any help is greatly appreciated.

Thank you.

  • 0
    TI__Mastermind 37500 points
    Hello,
    If you are trying to control the LP87524 PMIC the EN1 signal, PMIC_EN on the EVM needs to be an open collector type IO. You will see a pullup resistor to a special 3.3v divider on the 1443 EVM schematic.

    The LP87524B(J) datasheet, section 7.6 shows the default (OTP) values, which control the startup sequence when occurs after EN1 0->1.

    The radar power sequence is not dependent on Core before IO, or IO before Core, all 4 power rails should be within the 5% tolerance at least 3 ms before the NRESET signal is released 0->1. This is also shown in the IWr1443 datasheet. Figure 5-2.

    1) for basic PMIC control the LP87524B is used with the (2) RFLDOs, and is self programmed.
    following swra577 the LP87524J is used without the RFLDOs and is self programmed.

    2) Figure 5-2 in the datasheet.

    3) yes, depending on your application you would use the Out of Box demo with the mmwave SDK, this also needs the onboard XDS110 to transfer the Control UART, and MSS Logger UART to the USB port.

    or you would follow one of the TIDEP TI designs for IWr1443,
    High Speed LVDS data, and Control UART - this would be following the TSW1400, DCA1000 examples
    no LVDS data, BP/LP connection for SPI, UART, GPIO, with SOP[2] for flashing mode - follow TIDEP91 or other TI designs

    on the TI website, you can search for "IWR1443" for the TIREX-Labs, TIDEP TI designs, that will have more information.

    Regards,
    Joe Quintal