STM32L412RBI6XXX datasheet(113/192 Pages) STMICROELECTRONICS

113 / 192 page

DS12469 Rev 8

113/192

STM32L412xx

Electrical characteristics

164

tWUSTOP2

Wake up time from Stop 2

mode to Run mode in

Flash

Range 1

Wakeup clock MSI = 48 MHz

8.02

9.24

µs

Wakeup clock HSI16 = 16 MHz 7.66

8.95

Range 2

Wakeup clock MSI = 24 MHz

8.5

9.54

Wakeup clock HSI16 = 16 MHz 7.75

8.95

Wakeup clock MSI = 4 MHz

12.06 13.16

Wake up time from Stop 2

mode to Run mode in

SRAM1

Range 1

Wakeup clock MSI = 48 MHz

5.45

6.79

Wakeup clock HSI16 = 16 MHz

6.9

7.98

Range 2

Wakeup clock MSI = 24 MHz

6.3

7.36

Wakeup clock HSI16 = 16 MHz

6.9

7.9

Wakeup clock MSI = 4 MHz

13.1 13.31

tWUSTBY

Wakeup time from Standby

mode to Run mode

Range 1

Wakeup clock MSI = 8 MHz

12.2 18.35

µs

Wakeup clock MSI = 4 MHz

19.14 25.8

tWUSTBY

SRAM2

Wakeup time from Standby

with SRAM2 to Run mode

Range 1

Wakeup clock MSI = 8 MHz

12.1

18.3

µs

Wakeup clock MSI = 4 MHz

19.2 25.87

tWUSHDN

Wakeup time from

Shutdown mode to Run

mode

Range 1

Wakeup clock MSI = 4 MHz

261.5 315.7

µs

1. Guaranteed by characterization results.

Table 50. Low-power mode wakeup timings(1) (continued)

Symbol

Parameter

Conditions

Typ

Max

Unit

Table 51. Regulator modes transition times(1)

Symbol

Parameter

Conditions

Typ

Max

Unit

tWULPRUN

Wakeup time from Low-power run mode to

Run mode(2)

Code run with MSI 2 MHz

µs

tVOST

Regulator transition time from Range 2 to

Range 1 or Range 1 to Range 2(3)

Code run with MSI 24 MHz

1. Guaranteed by characterization results.

2. Time until REGLPF flag is cleared in PWR_SR2.

3. Time until VOSF flag is cleared in PWR_SR2.

Table 52. Wakeup time using USART/LPUART(1)

Symbol

Parameter

Conditions

Typ

Max

Unit

tWUUSART

tWULPUART

Wakeup time needed to calculate the

maximum USART/LPUART baudrate

allowing to wakeup up from stop mode

when USART/LPUART clock source is

HSI

Stop 0 mode

1.7

µs

Stop 1 mode and Stop 2

mode

-8.5

1. Guaranteed by design.

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