In Standby mode, all I/O pins are high impedance except for: - Reset pad (still available) - RTC_AF1 pin (PC13) if configured for tamper, time-stamp, RTC Alarm out, or RTC clock calibration out. - RTC_AF2 pin (PI8) if configured for tamper or time-stamp. - WKUP pin 1 (PA0) if enabled.
Examples
HAL_PWR_EnterSTANDBYMode() is referenced by 25 libraries and example projects: