Datasheet

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STM32F427xx STM32F429xx Electrical characteristics
198
6.3.8 Wakeup time from low-power modes
The wakeup times given in Table 36 are measured starting from the wakeup event trigger up
to the first instruction executed by the CPU:
• For Stop or Sleep modes: the wakeup event is WFE.
• WKUP (PA0) pin is used to wakeup from Standby, Stop and Sleep modes.
All timings are derived from tests performed under ambient temperature and V
DD
=3.3 V.
Table 36. Low-power mode wakeup timings
Symbol Parameter Conditions
Typ
(1)
Max
(1)
Unit
t
WUSLEEP
(2)
Wakeup from Sleep - 6 -
CPU
clock
cycle
t
WUSTOP
(2)
Wakeup from Stop mode
with MR/LP regulator in
normal mode
Main regulator is ON 13.6 -
µs
Main regulator is ON and Flash
memory in Deep power down mode
93 111
Low power regulator is ON 22 32
Low power regulator is ON and Flash
memory in Deep power down mode
103 126
t
WUSTOP
(2)
Wakeup from Stop mode
with MR/LP regulator in
Under-drive mode
Main regulator in under-drive mode
(Flash memory in Deep power-down
mode)
105 128
Low power regulator in under-drive
mode
(Flash memory in Deep power-down
mode )
125 155
tWUSTDBY
(2)(3)
Wakeup from Standby
mode
318 412
1. Guaranteed by characterization results.
2. The wakeup times are measured from the wakeup event to the point in which the application code reads the first
3. t
WUSTDBY
maximum value is given at –40 °C.
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