Power consumption of STOP mode for KE06

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Power consumption of STOP mode for KE06

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kyleyang
Contributor IV

Hi

 

I use a FRDM-KE06Z to test power consumption of KE06.

According to schematic, I removed R77 and R11 to measure power consumption of KE06.

I use KDS to create a project and only enable the "STOP operation mode" and generate "SetOperationMode".

Other setting of MCU is default, no external crystal/OSC enable.

According to datasheet, the typical current is around 2uA, but I measure the current is around 120uA.

Did I miss any setting or something wrong?

 

I attached my project code, thanks.

Original Attachment has been moved to: KE06.7z.zip

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santiago_gonzal
NXP Employee
NXP Employee

Hello,

You need to disable the Low Voltage detector, which adds 120 uA to the current.

See the following code:

int main(void)

{

  int counter = 0;

  PMC_Init();

  GoToLowPower(WAIT);

  for(;;) {  

    counter++;

  }

  return 0;

}

void GoToLowPower (uint8_t OperationMode) {

  

    switch (OperationMode) {

        case WAIT:

            /* SCB_SCR: SLEEPDEEP=0 */

            SCB_SCR &= (uint32_t)~(uint32_t)(SCB_SCR_SLEEPDEEP_MASK);

            /* SCB_SCR: SLEEPONEXIT=0 */

            SCB_SCR &= (uint32_t)~(uint32_t)(SCB_SCR_SLEEPONEXIT_MASK);

            __asm("WFI");

            break;

        case STOP:

            /* SCB_SCR: SLEEPONEXIT=0 */

            SCB_SCR &= (uint32_t)~(uint32_t)(SCB_SCR_SLEEPONEXIT_MASK);

            /* SCB_SCR: SLEEPDEEP=1 */

            SCB_SCR |= SCB_SCR_SLEEPDEEP_MASK;

            __asm("WFI");

            break;

        default:

             for(;;);

      }

}

void PMC_Init () {

    /* PMC_SPMSC2: LVDV=0,LVWV=0 */

  PMC_SPMSC2 &= (uint8_t)~(uint8_t)(

                PMC_SPMSC2_LVDV_MASK |

                PMC_SPMSC2_LVWV(0x03)

               );

  /* PMC_SPMSC1: LVWACK=1,LVWIE=0,LVDRE=1,LVDSE=1,LVDE=1,??=0,BGBE=0 */

  PMC_SPMSC1 = (uint8_t)((PMC_SPMSC1 & (uint8_t)~(uint8_t)(

               PMC_SPMSC1_LVWIE_MASK |

               PMC_SPMSC1_BGBE_MASK |

               0x02U|

               PMC_SPMSC1_LVDE_MASK

               )) | (uint8_t)(

               PMC_SPMSC1_LVWACK_MASK |

               PMC_SPMSC1_LVDRE_MASK |

               PMC_SPMSC1_LVDSE_MASK

               ));

}

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santiago_gonzal
NXP Employee
NXP Employee

Hello,

You need to disable the Low Voltage detector, which adds 120 uA to the current.

See the following code:

int main(void)

{

  int counter = 0;

  PMC_Init();

  GoToLowPower(WAIT);

  for(;;) {  

    counter++;

  }

  return 0;

}

void GoToLowPower (uint8_t OperationMode) {

  

    switch (OperationMode) {

        case WAIT:

            /* SCB_SCR: SLEEPDEEP=0 */

            SCB_SCR &= (uint32_t)~(uint32_t)(SCB_SCR_SLEEPDEEP_MASK);

            /* SCB_SCR: SLEEPONEXIT=0 */

            SCB_SCR &= (uint32_t)~(uint32_t)(SCB_SCR_SLEEPONEXIT_MASK);

            __asm("WFI");

            break;

        case STOP:

            /* SCB_SCR: SLEEPONEXIT=0 */

            SCB_SCR &= (uint32_t)~(uint32_t)(SCB_SCR_SLEEPONEXIT_MASK);

            /* SCB_SCR: SLEEPDEEP=1 */

            SCB_SCR |= SCB_SCR_SLEEPDEEP_MASK;

            __asm("WFI");

            break;

        default:

             for(;;);

      }

}

void PMC_Init () {

    /* PMC_SPMSC2: LVDV=0,LVWV=0 */

  PMC_SPMSC2 &= (uint8_t)~(uint8_t)(

                PMC_SPMSC2_LVDV_MASK |

                PMC_SPMSC2_LVWV(0x03)

               );

  /* PMC_SPMSC1: LVWACK=1,LVWIE=0,LVDRE=1,LVDSE=1,LVDE=1,??=0,BGBE=0 */

  PMC_SPMSC1 = (uint8_t)((PMC_SPMSC1 & (uint8_t)~(uint8_t)(

               PMC_SPMSC1_LVWIE_MASK |

               PMC_SPMSC1_BGBE_MASK |

               0x02U|

               PMC_SPMSC1_LVDE_MASK

               )) | (uint8_t)(

               PMC_SPMSC1_LVWACK_MASK |

               PMC_SPMSC1_LVDRE_MASK |

               PMC_SPMSC1_LVDSE_MASK

               ));

}

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kyleyang
Contributor IV

Hi Santiago Gonzalez Fabian

Thanks for your help.

After I disable LVD module, the power consumption down to ~2uA.

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jeremyzhou
NXP Employee
NXP Employee

Hi Kyle,

After had a brief look through the demo, I think the demo is correct.

My co-worker told me that there are some bugs with the FRDM-KE06 board, when you choose the 3.3v supply, the current consumption is good, however it will increase greatly when choose the 5v supply.
Have a great day,
Ping

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