5.1.4.1.3. Non-functional Requirements
GPIO operations must respond within 5 clock cycles to ensure smooth operations. |
GPIO configurations must remain stable during typical operating conditions, such as normal temperature (−40°C to +85°C) and voltage ranges (3.0V to 3.6V), as well as during system soft resets, ensuring reliable functionality without unintended changes. |
GPIO interrupts must have a latency of no more than 10 microseconds, ensuring timely peripheral response. |
GPIO pins must support standard 3.3V logic levels for proper interfacing. |
Input signals must reject noise below 50mV, ensuring reliable detection of valid transitions. |
GPIO output must provide current up to 20mA. |
GPIO pins must allow configuration for alternate functions such as PWM, SPI, or I2C, without conflicts between peripherals. |
Reconfiguring a GPIO pin must not take more than 2 milliseconds to maintain real-time responsiveness. |
Configurable debounce delays between 1ms and 20ms must stabilize input signals for mechanical switches or sensors. |
GPIO pin-to-physical pin mappings must align with the STM32F411 datasheet, avoiding discrepancies. |
GPIO configurations must not cause the MCU temperature to exceed 80°C during sustained operation of peripherals. |
GPIO pins must preserve their configured states during temporary power fluctuations or resets. |
GPIO pins must allow dynamic reconfiguration of mode without requiring a full system restart. |
GPIO interrupts must support up to 8 priority levels, ensuring critical events are handled first. |
Output voltage levels for HIGH and LOW states must remain stable within ±5% of 3.3V under varying loads. |
In standby mode, GPIO pins must consume no more than 10µA of current per pin. |
Rising and Falling edge interrupts must detect signal transitions accurately up to 500kHz. |
GPIO state monitoring must allow a minimum polling interval of 500 microseconds for real-time applications. |
Switching between alternate functions on a GPIO pin must take no longer than 1 millisecond. |
Locked GPIO configurations must only be alterable through a system-wide reset or authorized unlock sequence. |
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