MIMXRT1176 power and DCDC module

[muxeu]

Hello.

Please tell me:

1. How do the PMIC_STBY_REQ and PMIC_ON_REQ signals work?
2. Do I understand correctly that the output voltage of the DCDC module is adjusted in the CTRL1 register?
3. How do the GPIO_SNVS_xx signals work?

[Alexis_A · Accepted solution]

Hello @muxeu,

1. How do the PMIC_STBY_REQ and PMIC_ON_REQ signals work?

In the chapter 25.3.2 explains in more detail the behavior of this signals.

SNVS_PMIC_STBY_REQ outputs a high-level signal under Suspend Mode (Stop Mode).

After it entry into SNVS mode, it will drive PMIC_ON_REQ to low, and resume to high on waking up, this can be used to control power supply for SOC.

2. Do I understand correctly that the output voltage of the DCDC module is adjusted in the CTRL1 register?

That's right, depending of the mode (standby/buck) is the register to use.

3. How do the GPIO_SNVS_xx signals work?

The signal has two functionalities, the GPIO and the tamper, which one do you mean?

Best Regards,
Alexis Andalon

[muxeu]

Thanks for answers. Interested in the operation of the GPIO_SNVS signals in relation to the SNVS module.

[Alexis_A]

Hello @muxeu,

The SNVS mention is due to the tamper feature related to this pins. In the MIMXRT1176 is not present this feature so it will only work as GPIO.

Best Regards,
Alexis Andalon