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CC2640R2F: how to enter standby when using SPI and ADC

will wang43
Expert 1205 points
Part Number: CC2640R2F

Hi

I'm doing a RFID project, using ADC & SPI peripherals.But the current is about 1mA when sleeping, it's too high. My test  as below:

1.Using default simple_peripheral Code, modify DEFAULT_ADVERTISING_INTERVAL to 1600(1s) and SBP_PERIODIC_EVT_PERIOD to 50 ,the current is about 70uA.

2.Add RFID code,the current is about 1mA.

So I think the reason is ADC & SPI doesn't close when enter standby mode.

So does  ADC & SPI need special setting when entering standby mode?

Thanks!

  • 0
    TI__Guru 56590 points
    Hello Will,
    Can you verify that the current is high during long periods of standby and that it is not simply expected current consumption due to extra processing?
    Can you please try to disable ADC and SPI separately to verify which of the two drivers might cause the extra current consumption?
  • 0
    Guru 86755 points
    Hi will,

    Are you using CC2640R2F Launchpad or custom CC2640R2F board? After you close SPI and ADC, how do you measure Standby Current? Did you use code to enter Standby Mode then measure current?

    -kel
  • 0 in reply to Eirik V
    TI__Guru 56590 points
    Hello Will, Did you solve you issue?
    It could also be an idea to verify that there are no leakage through the IO pins connected to the external peripherals due to an incorrect configuration (pull-push).