STM32F103X8 查看數據表（PDF） - STMicroelectronics

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STM32F103X8

Performance line, ARM-based 32-bit MCU with Flash, USB, CAN, seven 16-bit timers, two ADCs and nine communication interfaces

STMicroelectronics 

STM32F103xx

Electrical characteristics

5.3.6

External clock source characteristics

High-speed external user clock

The characteristics given in Table 15 result from tests performed using an high-speed

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

summarized in Table 7.

Table 15. High-speed external (HSE) user clock characteristics

Symbol

Parameter

Conditions

Min

Typ

Max Unit

fHSE_ext

User external clock source

frequency(1)

VHSEH

OSC_IN input pin high level

voltage

VHSEL

OSC_IN input pin low level

voltage

8

25

MHz

0.7VDD

VSS

VDD

V

0.3VDD

tw(HSE)

tw(HSE)

OSC_IN high or low time(1)

16

tr(HSE)

tf(HSE)

OSC_IN rise or fall time(1)

IL

OSC_IN Input leakage

current

VSS ≤VIN ≤VDD

ns

5

±1

µA

1. Value based on design simulation and/or technology characteristics. It is not tested in production.

Low-speed external user clock

The characteristics given in Table 16 result from tests performed using an low-speed

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

summarized in Table 7.

Table 16. Low-speed external user clock characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

fLSE_ext

User External clock source

frequency(1)

VLSEH

OSC32_IN input pin high level

voltage

VLSEL

OSC32_IN input pin low level

voltage

tw(LSE)

tw(LSE)

tr(LSE)

tf(LSE)

IL

OSC32_IN high or low time(1)

OSC32_IN rise or fall time(1)

OSC32_IN Input leakage

current

VSS ≤VIN ≤VDD

0.7VDD

VSS

450

32.768

1000

VDD

0.3VDD

5

±1

1. Value based on design simulation and/or technology characteristics. It is not tested in production.

Unit

kHz

V

ns

µA

33/67

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