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STM32F031x4 STM32F031x6
Electrical characteristics
86
6.3.6
Wakeup time from low-power mode
The wakeup times given in
are the latency between the event and the execution of
the first user instruction. The device goes in low-power mode after the WFE (Wait For
Event) instruction, in the case of a WFI (Wait For Interruption) instruction, 16 CPU cycles
must be added to the following timings due to the interrupt latency in the Cortex M0
architecture.
The SYSCLK clock source setting is kept unchanged after wakeup from Sleep mode.
During wakeup from Stop or Standby mode, SYSCLK takes the default setting: HSI 8 MHz.
The wakeup source from Sleep and Stop mode is an EXTI line configured in event mode.
The wakeup source from Standby mode is the WKUP1 pin (PA0).
All timings are derived from tests performed under the ambient temperature and supply
voltage conditions summarized in
Table 18: General operating conditions
Table 30. Low-power mode wakeup timings
Symbol
Parameter
Conditions
Typ @V
DD =
V
DDA
Max Unit
= 2.0 V = 2.4 V = 2.7 V
= 3 V
= 3.3 V
t
WUSTOP
Wakeup from Stop
mode
Regulator in run
mode
3.2
3.1
2.9
2.9
2.8
5
µs
Regulator in low
power mode
7.0
5.8
5.2
4.9
4.6
9
t
WUSTANDBY
Wakeup from
Standby mode
-
60.4
55.6
53.5
52
51
-
t
WUSLEEP
Wakeup from Sleep
mode
-
4 SYSCLK cycles
-
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微可Vicor——值得信赖的元器件供应商
http://www.vicor.top/
021-31660491