Our IMX28 switches off in an brownout condition. I have an 47k Pullup from a GPIO to VDDIO. When VDDIO begins to sink due to the VBATT brownout, i can see an instant drop of 1V over the resistor, which means, there's an 20µA current flowing in the GPIO. Is there any specification about this behavior.
Is there any way to recognise the brownout moment by hardware?