Hi,
I am using an nPM1300 together with an nRF5340 and an LIS2DW12 accelerometer. The nRF is powered from VOUT1 on the PMIC, and after some time of inactivity it is turned off by disabling BUCK1. Upon movement, BUCK1 should be enabled again by a latched interrupt from the accelerometer routed to GPIO0 on the PMIC.
However, when configuring the interrupt and GPIO input to active low, the signal does not respond to movement, it just stays at the higher voltage level. If I instead set it to active high, the interrupt comes in as expected, but when the nRF wakes up, it clears the interrupt before I can disable the GPIO control on BUCK1, so the negative edge turns it off again.
I am powering the PMIC VDDIO from an external source and have removed the jumper on P18. The accelerometer interrupt is configured as push-pull.
The overlay options for BUCK1 are the following:
npm1300_buck1: BUCK1 {
regulator-min-microvolt = <1000000>;
regulator-max-microvolt = <3300000>;
retention-microvolt = <1000000>;
enable-gpios = <&npm1300_gpio 0 GPIO_ACTIVE_LOW>;
};
How can I either get the active low interrupt to work on the PMIC or make sure that an active high interrupt does not clear when the nRF wakes up?
Thanks,
Silvia