ST STM32L4 5 Series User Manual

DocID024597 Rev 5 163/1830
RM0351 Power control (PWR)
198
Table 22. Low-power mode summary
Mode name Entry
Wakeup
source
(1)
Wakeup
system clock
Effect on clocks
Voltage
regulators
MR LPR
Sleep
(Sleep-now or
Sleep-on-exit)
WFI or Return
from ISR
Any interrupt
Same as before
entering Sleep
mode
CPU clock OFF
no effect on other clocks
or analog clock sources
ON ON
WFE Wakeup event
Low-power
run
Set LPR bit Clear LPR bit
Same as Low-
power run clock
None OFF ON
Low-power
sleep
Set LPR bit +
WFI or Return
from ISR
Any interrupt
Same as before
entering Low-
power sleep
mode
CPU clock OFF
no effect on other clocks
or analog clock sources
OFF ON
Set LPR bit +
WFE
Wakeup event OFF ON
Stop 0
LPMS=”000” +
SLEEPDEEP bit
+ WFI or Return
from ISR or WFE
Any EXTI line
(configured in the
EXTI registers)
Specific
peripherals
events
HSI16 when
STOPWUCK=1 in
RCC_CFGR
MSI with the
frequency before
entering the Stop
mode when
STOPWUCK=0.
All clocks OFF except
LSI and LSE
ON
ON
Stop 1
LPMS=”001” +
SLEEPDEEP bit
+ WFI or Return
from ISR or WFE
OFF
Stop 2
LPMS=”010” +
SLEEPDEEP bit
+ WFI or Return
from ISR or WFE
Standby with
SRAM2
LPMS=”011”+
Set RRS bit +
SLEEPDEEP bit
+ WFI or Return
from ISR or WFE
WKUP pin edge,
RTC event,
external reset in
NRST pin,
IWDG reset
MSI from 1 MHz
up to 8 MHz
Standby
LPMS=”011” +
Clear RRS bit +
SLEEPDEEP bit
+ WFI or Return
from ISR or WFE
WKUP pin edge,
RTC event,
external reset in
NRST pin,
IWDG reset
OFF OFF
Shutdown
LPMS=”1--” +
SLEEPDEEP bit
+ WFI or Return
from ISR or WFE
WKUP pin edge,
RTC event,
external reset in
NRST pin
MSI 4 MHz
All clocks OFF except
LSE
OFF OFF
1. Refer to Table 23: Functionalities depending on the working mode.

ST STM32L4 5 Series Specifications

General

Brand	ST
Model	STM32L4 5 Series
Category	Microcontrollers
Language	English