Can't wake up after STOP Mode

[Phyo .1]

In the case of normal wake-up, about 6~7 mA current is consumed and 100~250uA is consumed when going into stop mode.

Sometimes, it cannot wake up from stop mode when it consumes about 1.6 to 1.7 mA

Here is my code:

HAL_RTCEx_SetWakeUpTimer_IT(&hrtc, g_sleep_time, RTC_WAKEUPCLOCK_CK_SPRE_16BITS);

   HAL_SuspendTick();

   HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);

   HAL_ResumeTick();

   HAL_RTCEx_DeactivateWakeUpTimer(&hrtc);

   SystemClock_Config();

I attached schematic.

plz, help me.

[Phyo .1 · Accepted solution]

I solved this issue, it was problem on my side. (uart pull-up problem)