Hi everyone,
I am currently looking for a solution to use low voltage detection to monitor the 3.3V power rail of the iMXRT1062. I think 2.8V is just about the lowest voltage I need to run the VD_HIGH_IN. In my project, I am currently using brownout detection from LDO 2P5(Set to 2.875V). It works well If the power going down to 2.8V ish, the system can trigger PMU IRQ to execute my data saving function call. During the setup, I noticed one thing about the LDO 2P5 output target:
Does the extremes of the programming range regarding to the voltage value greater than 2.875V? Or the maximum value: 2.875V?
Thanks,
Lumax
The brownout will monitor the LDO output.
Brownout target = OUTPUT_TRG - BO_OFFSET
If you want to monitor the system power you can use a voltage monitor as the EVK to prevent power glitch.
Best regards,
Omar
Thanks for your Reply!
Since it says may reduce the chip functionalities.
I wonder is there a way to use the brownout detection if I use the default value(2.5V)of LDO 2P5? It seems like after about 2.75V the microcontroller will be turn off and freeze. BTW, I am not using low power mode. Or, are there any another way to do a low voltage detection?
Thanks!
Lumax
Hello
It refers to the programing extremes being 0x0 and 0x1F.
Typical Programming Operating Range is 2.25 V to 2.75 V.
Best regards,
Omar