Figure 47. Mcu In Standby Mode; Figure 48. Rtc Alarm Causes The Mcu To Exit Standby Mode - STMicroelectronics STM32100B-EVAL User Manual

Running the demonstration
There are two ways to make the STM32F100VB exit Standby mode.
●
In the first case, you can use the Wakeup push-button. Once the Standby mode
submenu has been selected, the red LEDs continue blinking until you press the "SEL"
push-button, and the system enters Standby mode. When the MCU is in Standby
mode, the message shown in

Figure 47. MCU in Standby mode

The MCU remains in Standby mode until the Wakeup push-button is pressed. Once you
press the Wakeup push-button, the MCU exits Standby mode and the system reset signal is
generated.
Note: If an RTC Alarm is generated while the MCU is in Standby mode and the message shown in
Figure 47
exit the Standby mode), the RTC Alarm causes the MCU to exit the Standby mode and a
system reset signal is generated.

Figure 48. RTC Alarm causes the MCU to exit Standby mode

●
In the second case, the RTC Alarm wakes up the MCU from Standby mode after the
programmed time has elapsed. When selecting this submenu, you have to set the
alarm to the time when the MCU is to exit Standby mode. To set the wakeup time, follow
the procedure explained in the section
34/48
MCU in Standby Mode
To exit press Wakeup
is displayed (which means that the Wakeup push-button needs to be pressed to
Wakeup by RTC Alarm
Press joystick to
continue...
Doc ID 16982 Rev 1
Figure 47 is displayed on the LCD.
Stop Mode
Time submenu.
UM0891