ST STM32F412 User Manual

Power controller (PWR) RM0402
96/1163 RM0402 Rev 6
5.3.4 Batch acquisition mode
Entering BAM
The BAM is entered according to Section : Entering low-power mode, when the
SLEEPDEEP bit in the Cortex
®
-M4 with FPU System Control register is cleared.
Refer to Table 18 and Table 19 for details on how to enter Sleep mode.
Before entering Sleep mode, the Flash memory must be configured by software to operate
in the required low- power mode. If data need to be transferred from peripheral to RAM
during BAM, the DMA must be enabled before entering Sleep mode.
Exiting BAM
The BAM is exited according to Section : Exiting low-power mode.
Refer to Table 18 and Table 19 for more details on how to exit Sleep mode.
After waking up from BAM, the Flash memory must first to be waked up if code execution
restarts from Flash memory.
This wakeup time must be managed by software running from the internal SRAM.
Mode exit Interrupt: refer to Table 40: Vector table for STM32F412xx
Wakeup latency None
Table 17. Sleep-on-exit entry and exit (continued)
Sleep-on-exit Description
Table 18. 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 40: Vector table for STM32F412xx
If WFE was used for entry
Wakeup event: Refer to Section 10.2.3: 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).

ST STM32F412 Specifications

General

Brand	ST
Model	STM32F412
Category	Microcontrollers
Language	English