ST STM32F410 User Manual

RM0401 Rev 3 79/771
RM0401 Power controller (PWR)
90
4.3.7 Stop mode
The Stop mode is based on the Cortex
®
-M4 with FPU deepsleep mode combined with
peripheral clock gating. The voltage regulator can be configured either in normal or low-
power mode. In Stop mode, all clocks in the 1.2
V domain are stopped, the PLLs, the HSI
and the HSE RC oscillators are disabled. Internal SRAM and register contents are
preserved.
Some settings in the PWR_CR register allow to further reduce the power consumption.
When the Flash memory is in power-down mode, an additional startup delay is incurred
when waking up from Stop mode (see
Table 19: Stop operating modes and Section 4.4.1:
PWR power control register (PWR_CR)).
Table 17. BAM-now entry and exit
Sleep-now mode Description
Mode entry
Set the Flash memory in low-power mode:
– FISSR/FMSSR and FPDS bits of the PWR_CR register
WFI (Wait for Interrupt) or WFE (Wait for Event) while:
– SLEEPDEEP = 0 and
– SLEEPONEXIT = 0
Refer to the Cortex
®
-M4 with FPU System Control register.
Mode exit
If WFI was used for entry:
Interrupt: Refer to Table 39: Vector table
If WFE was used for entry
Wakeup event: Refer to Section 9.2.3: Wakeup event management
If Flash memory wakeup time is needed, FISSR/FMSSR bits of PWR_CR
register must be set
Wakeup latency
None if code executed from RAM
Low-power mode Flash memory wakeup time, before restarting code
execution from Flash memory (refer to the Flash memory wakeup time in
the Electrical characteristics section of the datasheet).
Table 18. BAM-on-exit entry and exit
Sleep-on-exit Description
Mode entry
Set the Flash memory in low-power mode:
– FISSR/FMSSR and FPDS bits of the PWR_CR register
WFI (wait for interrupt) while:
– SLEEPDEEP = 0 and
– SLEEPONEXIT = 1
Refer to the Cortex
®
-M4 with FPU System Control register.
Mode exit
Interrupt: refer to Table 39: Vector table
If Flash memory wakeup time is needed, FISSR/FMSSR bits of PWR_CR
register must be set
Wakeup latency
None when code executed from internal SRAM
Low-power mode Flash memory wakeup time, before restarting code
execution from Flash memory (refer to the Flash memory wakeup time in
the Electrical characteristics section of the datasheet).

ST STM32F410 Specifications

General

Brand	ST
Model	STM32F410
Category	Microcontrollers
Language	English