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- Posts: 11
- Joined: 2025-03-29 12:56
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
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- Posts: 1508
- Joined: 2024-01-23 7:21
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.
