S32K116 RUN to VLPS Mode and Interrupt AWIC/NVIC for wakeup

mumumilmil · ‎05-13-2025

Hi, I used S32K116 ARM v2.2 tool.

I'm trying to apply Run Mode -> VLPS Mode

By 61mA -> 32mA - it means go to VLPR Mode. (I should be reduce Current to ~1mA)

But, I think that example code doesn't go deepsleep Mode.

mumumilmil_0-1747202148718.png

It seems to go VLPR Mode but, Not going to VLPS Mode(deepsleep)

void enable_low_power_modes(void)

{

SMC->PMPROT |= SMC_PMPROT_AVLP(1); /* Allow very low power run mode */

SMC->PMCTRL |= SMC_PMCTRL_RUNM(2);

}

void go_to_sleep(void)

{

unsigned long int regValue = ((*(unsigned long int *)0x4007E014u) & 0xFFu);

/* Very low power stop mode can be entered only from Run mode or Very low power run mode*/

if ((regValue != 1UL) && (regValue != 4UL)) {

return;

}

/* Set the SLEEPDEEP bit to enable deep sleep mode (STOP)*/

(*(unsigned long int *) 0xE000ED10u) |= (1 << 2);

/* Set power mode to specified STOP mode*/

/* SMC_HAL_SetStopModeControl(baseAddr, stopMode); */

SMC->PMCTRL |= SMC_PMCTRL_STOPM(2);

/* Wait For Interrupt */

#if defined (__GNUC__)

__asm volatile ("wfi");

#endif

}

And if VLPS mode needs to SIRC Clock, I should adjust VCCR? ( Now, Using RCCR for SYS, Core clock)

mumumilmil_1-1747202367059.png

danielmartynek · ‎05-14-2025

Hi @mumumilmil,

Do you have an NXP EVB or you own board?

Where do you measure the current?

Make sure the power supply does not power other components on the board and that the MCU does not drive anything on its outputs as they remain active in all S32K1xx low power modes.

Can you use the functions from this example?

https://community.nxp.com/t5/S32K-Knowledge-Base/Example-S32K144-RTC-VLPS/ta-p/1119655

Regards,

Daniel

mumumilmil · ‎05-14-2025

Hi, @danielmartynek

I measured current to multimeter from board to power supply.

so, it is difficult to measure each IC's current..

Then, If FIRC have converted to SIRC, how to check applied SIRC Clock?

danielmartynek · ‎05-14-2025

On S32K116 EVB, there is J15 for this purpose.

danielmartynek_0-1747224340498.png

The example I linked here has this function that enables CLKOUT, so you can measure BUS_CLK before and after the switch from FICR to SIRC.

/*******************************************************************************
Function: clkout_bus
*******************************************************************************/
void clkout_bus(void)
{
  SIM->CHIPCTL &= ~(1 << 11); //Disable CLKOUT
  SIM->CHIPCTL |= (9 << 4); //BUS_CLK
  SIM->CHIPCTL |= (1 << 11); //Enable CLKOUT
  // [11] CLKOUTEN = 1 CLKOUT enable
  // [7-4] CLKOUTSEL = 0b1001 BUS_CLK
}