Stop Mode; Table 17. Bam-Now Entry And Exit; Table 18. Bam-On-Exit Entry And Exit - ST STM32F410 Reference Manual

RM0401
Sleep-now mode
Mode entry
Mode exit
Wakeup latency
Sleep-on-exit
Mode entry
Mode exit
Wakeup latency
4.3.7

Stop mode

The Stop mode is based on the Cortex
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
PWR power control register

Table 17. BAM-now entry and exit

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.
If WFI was used for entry:
Interrupt: Refer to Table 39: Vector table
If WFE was used for entry
Wakeup event: Refer to
If Flash memory wakeup time is needed, FISSR/FMSSR bits of PWR_CR
register must be set
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

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.
Interrupt: refer to Table 39: Vector table
If Flash memory wakeup time is needed, FISSR/FMSSR bits of PWR_CR
register must be set
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).
®
-M4 with FPU deepsleep mode combined with
Table 19: Stop operating modes
(PWR_CR)).
RM0401 Rev 3
Power controller (PWR)
Description
Section 9.2.3: Wakeup event management
Description
and Section 4.4.1:
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