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SM320F28335-EP: Current/power consumption

arif khan
Prodigy 100 points
Part Number: SM320F28335-EP


Tool/software:

We are using the SM320F28335PTPS for downhole drilling tool application. The device is running off a 6Mhz oscillator. I have turned off all the peripheral clocks as well as the PLL. At room temperature, the 3.3V rail is drawing about 20 mA and the 1.9V is also drawing about 20 mA.

What else can I do to reduce this power/current consumption?

Thanks

Arif

  • 0
    TI__Expert 5220 points

    Hello Arif,

    I have a couple of suggestion in mind:

    1. Reduce the CPU clock frequency: Since you've already turned off the PLL, you can try reducing the CPU clock frequency to the lowest possible value. This can be done by configuring the clock tree using the SysCtl_setClock() function.

    2. Disable unused modules: Even though you've turned off peripheral clocks, some modules might still be enabled. Review the device's datasheet and disable any unused modules, such as the ADC, DAC, or serial communication modules

    3. Put the device in Low Power Mode (LPM): The SM320F28335PTPS has various low power modes, such as LPM0, LPM1, LPM2, and LPM3. Putting the device in one of these modes can significantly reduce power consumption. You can use the SysCtl_enterLPM() function to enter a low power mode.

    Hope this helps.