I have a question regarding GPIO settings for the STM32H743.
Does anyone have detailed documentation on the speed of the GPIOx_OSPEEDR register?
I would like to know the criteria for using low speed or very high speed.
Hello,
It depends on your usage and your use case. Each configuration has its advantage(s) and disadvantage(s).
Low Speed
- Use Case: Suitable for low-frequency signals and applications where power consumption is a critical concern.
- Advantages: Lower power consumption and reduced EMI.
- Disadvantages: Slower signal transitions, which may not be suitable for high-speed communication interfaces.
Example of usage: open/close a switch. Toggling a LED.
For applications like touch sensing, the Low speed might be too low, and higher speeds should be selectable.
Medium Speed
- Use Case: Suitable for moderate-frequency signals and general-purpose I/O.
- Advantages: Balanced power consumption and EMI.
- Disadvantages: May not be fast enough for high-speed interfaces.
Example of usage: toggling a GPIO pin. CEC communication.
High Speed
- Use Case: Suitable for higher-frequency signals and interfaces that require faster signal transitions.
- Advantages: Faster signal transitions, suitable for high-speed communication.
- Disadvantages: Higher power consumption and increased EMI.
Example of usage: SPI, I2C, and UART communication.
Very High Speed
- Use Case: Suitable for very high-frequency signals and interfaces that require the fastest signal transitions, such as high-speed data buses and clock signals.
- Advantages: Fastest signal transitions, suitable for very high-speed communication.
- Disadvantages: Highest power consumption and increased EMI.
Example of usage: used for external memories like FMC, (Q/O/X)SPI etc ..
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.