STM32L062T8 datasheet(65/124 Pages) STMICROELECTRONICS

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DS10183 Rev 11

65/124

STM32L062x8

Electrical characteristics

101

6.3.6

External clock source characteristics

Low-speed external user clock generated from an external source

The characteristics given in the following table result from tests performed using a low-

speed external clock source, and under ambient temperature and supply voltage conditions

summarized in Table 21.

tWUSTDBY

Wakeup from Standby mode, FWU bit = 1 fHCLK = MSI = 2.1 MHz

130

µs

Wakeup from Standby mode, FWU bit = 0 fHCLK = MSI = 2.1 MHz

2.2

tWUUSART

tWULPUART

Wakeup time required to calculate the

maximum USART/LPUART baudrate

while waking up from Stop mode using the

USART/LPUART

Stop mode, regulator in Run

mode

tWUSTOP

µs

Table 35. Low-power mode wakeup timings (continued)

Symbol

Parameter

Conditions

Typ

Max

Unit

Table 36. Low-speed external user clock characteristics(1)

1. Guaranteed by design, not tested in production

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fLSE_ext

User external clock source

frequency

32.768

1000

kHz

VLSEH

OSC32_IN input pin high level

voltage

0.7VDD

-VDD

VLSEL

OSC32_IN input pin low level

voltage

VSS

-0.3VDD

tw(LSE)

OSC32_IN high or low time

465

tr(LSE)

tf(LSE)

OSC32_IN rise or fall time

CIN(LSE) OSC32_IN input capacitance

0.6

DuCy(LSE) Duty cycle

OSC32_IN Input leakage current

VSS ≤ VIN ≤ VDD

±1

µA

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