STM32L452VCU6P datasheet(123/210 Pages) STMICROELECTRONICS

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STM32L452xx

Electrical characteristics

186

tWUSTOP2

Wake up time from Stop 2

mode to Run mode in

Flash

Range 1

Wakeup clock MSI = 48 MHz

7.93

9.1

µs

Wakeup clock HSI16 = 16 MHz

7.32

8.5

Range 2

Wakeup clock MSI = 24 MHz

8.25

9.4

Wakeup clock HSI16 = 16 MHz

7.32

8.4

Wakeup clock MSI = 4 MHz

11.43

13.3

Wake up time from Stop 2

mode to Run mode in

SRAM1

Range 1

Wakeup clock MSI = 48 MHz

5.23

Wakeup clock HSI16 = 16 MHz

6.33

7.1

Range 2

Wakeup clock MSI = 24 MHz

5.78

6.5

Wakeup clock HSI16 = 16 MHz

6.33

7.1

Wakeup clock MSI = 4 MHz

11.37

12.9

tWUSTBY

Wakeup time from Standby

mode to Run mode

Range 1

Wakeup clock MSI = 8 MHz

16.13

18.2

µs

Wakeup clock MSI = 4 MHz

24.06

26.6

tWUSTBY

SRAM2

Wakeup time from Standby

with SRAM2 to Run mode

Range 1

Wakeup clock MSI = 8 MHz

16.09

18.2

µs

Wakeup clock MSI = 4 MHz

26.6

tWUSHDN

Wakeup time from

Shutdown mode to Run

mode

Range 1

Wakeup clock MSI = 4 MHz

255.38 316.41

µs

1. Guaranteed by characterization results.

Table 52. Low-power mode wakeup timings(1) (continued)

Symbol

Parameter

Conditions

Typ

Max

Unit

Table 53. 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 54. 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 mode 0

1.7

µs

Stop mode 1/2

8.5

1. Guaranteed by design.

STM32L452VCU6P Datasheet(PDF) 123 Page - STMicroelectronics

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