topic Re: Trying to put a KL02 microcontroler in VLPS mode in Kinetis Microcontrollers

Trying to put a KL02 microcontroler in VLPS mode

omerarregi — Fri, 24 Apr 2015 13:14:26 GMT

I'm trying to put a KL02 microcontroler in VLPS mode (according to the datasheet the current consumption in this mode should be betwen 2 to 5 uA) but it seems that it doesn't enter in this mode properly. The current consumption is around 2mA after WFI instruction (3.6mA in normal operation)

I've an periodic interruption (1sec) using LPTIMER for RUN mode enter 1sec. after WFI instruction.

I'm trying to send the uC to VLPS mode out of this interruption with this code:

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

// set the uC in Very-Low-Power Stop mode (VLPS)

SMC->PMPROT |= (uint8_t)SMC_PMPROT_AVLP_MASK; // allow entry in low power modes

SMC->PMCTRL |= 0x02; // set VLPS mode for WFI state

MCM->CPO |= MCM_CPO_CPOWOI_MASK; // clear CPOREQ on any interrupt or exception vector fetch

MCM->CPO |= MCM_CPO_CPOREQ_MASK; // request Compute Operation

while (!(MCM->CPO & MCM_CPO_CPOACK_MASK)); // wait until Compute operation entry has completed

__WFI();

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

Any idea about what I'm doing wrong?

Thanks in advance

Re: Trying to put a KL02 microcontroler in VLPS mode

jeremyzhou — Mon, 27 Apr 2015 00:41:43 GMT

Hi Omer，

FSL's shared a sample code package of the FRDM-KL02 which includes a low power mode demo.

The demo's illustrated the ways to enter different low power modes, of course the VLPS mode in, you can refer to this demo for details.

Please download the sample code package through the link as below.

cache.freescale.com/files/32bit/software/KL02-SC.zip
Have a great day,
Ping

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Re: Trying to put a KL02 microcontroler in VLPS mode

omerarregi — Mon, 27 Apr 2015 10:12:40 GMT

Thanks, Problem solved