5.1.1.1.1. Informational Requirements
The GPIO firmware provides the current logical state (high or low) for each GPIO pin configured as output or input. |
A moder register is a control register used in microcontrollers to configure the operating mode of GPIO pins. |
The PUPDR (Pull-up/Pull-down Resistor Configuration) register is used to configure the internal pull-up and pull-down resistors for GPIO pins in input mode. |
The input functionality is designed to ensure accurate signal detection in GPIO. |
GPIO pins support two output configurations: push-pull and open-drain. |
Push-pull: The pin drives both high (1) and low (0) states. |
Open-drain: The pin drives only low (0) states, with a high (1) state achieved using an external pull-up resistor. |
Speed control has three types: low, medium, and high speed. |
Low speed: Suitable for low-frequency tasks like driving LEDs. |
Medium speed: Used for general-purpose tasks that balance performance and power consumption. |
High speed: Required for time-critical tasks like PWM or high-speed communication protocols. |