Disable SPLL and FIRC

leekate-b45752 — Wed, 15 Jul 2020 05:47:01 GMT

Hello,

Where can I find Disable SPLL or FIRC API in SDK?

Should I generate one more clock configuration in order to disable SPLL and FIRC before entering VLPS mode?

I also can't find DeInit API, could you guide how to implement "scg_disable_pll_and_firc()" with SDK?

AN5425

Best regards,

Kate Lee

Re: Disable SPLL and FIRC

danielmartynek — Mon, 02 Nov 2020 14:38:43 GMT

Hello Kate,

The power_manager SDK driver disables FIRC, SPLL, SOSC and switches the system clock to SIRC before the MCU goes to VLPS.

You can use the power_mode_switch SDK example and call this function:

/* Set power mode to VLPS */
 retV = POWER_SYS_SetMode(VLPS, POWER_MANAGER_POLICY_AGREEMENT);
‍‍

In power_manager_S32K1xx.c,

function POWER_SYS_SwitchToSleepingPowerMode()

Regards,

Daniel