Luckfox Forums

Hi everyone

I'm wondering what happens on the GPIO pins when the Core1106 gets powered off. I'm wondering if all gpios are automatically put in the high-z pull_none mode, or is there some HW pull-down pull-up resistors that define the state of specific GPIOs when powered off. I'm mostly interested in GPIO2_A4, GPIO2_A5, but I'd like to know it generally where to look up this information.

I'm also wondering what the suffixes mean when talking about GPIOs - in our case (GPIO2_A4_d) what does the 'd' represent and we also see 'u' and 'z' suffixes.

Thank you for your responses

Hello, after the system shuts down using the "halt" command, it usually restores all pins to their default states. Pins with the suffix "_u" indicate that they are in the default pull-up state and will be at a high level after shutdown. Pins with the suffix "_d" indicate that they are in the default pull-down state and will be at a low level after shutdown. Pins with the suffix "_z" indicate that they are in the default high-impedance state.
Regarding the GPIO2_A4 and GPIO2_A5 pins, you can actually test them out.