STM32F103RCT6 datasheet(55/130 Pages) STMICROELECTRONICS

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STM32F103xC, STM32F103xD, STM32F103xE

Electrical characteristics

Doc ID 14611 Rev 8

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5.3.6

External clock source characteristics

High-speed external user clock generated from an external source

The characteristics given in Table 21 result from tests performed using an high-speed

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

summarized in Table 10.

APB2

GPIOA

0.55

GPIOB

0.72

GPIOC

0.72

GPIOD

0.55

GPIOE

GPIOF

0.72

GPIOG

ADC1(2)

1.9

ADC2

1.7

TIM1

1.8

SPI1

0.4

TIM8

1.7

USART1

0.9

ADC3

1.7

fHCLK = 72 MHz, fAPB1 = fHCLK/2, fAPB2 = fHCLK, default prescaler value for each peripheral.

Specific conditions for ADC: fHCLK = 56 MHz, fAPB1 = fHCLK/2, fAPB2 = fHCLK, fADCCLK = fAPB2/4, ADON bit

in the ADC_CR2 register is set to 1.

Table 20.

Peripheral current consumption(1) (continued)

Peripheral

Typical consumption at 25 °C

Unit

Table 21.

High-speed external user clock characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fHSE_ext

User external clock source

frequency(1)

Guaranteed by design, not tested in production.

MHz

VHSEH

OSC_IN input pin high level voltage

0.7VDD

VDD

VHSEL

OSC_IN input pin low level voltage

VSS

0.3VDD

tw(HSE)

OSC_IN high or low time(1)

tr(HSE)

tf(HSE)

OSC_IN rise or fall time(1)

Cin(HSE)

OSC_IN input capacitance(1)

5pF

DuCy(HSE) Duty cycle

OSC_IN Input leakage current

VSS ≤ VIN ≤ VDD

±1

µA

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