STM32F101X4 datasheet(45/73 Pages) STMICROELECTRONICS

Part #	STM32F101X4

Description	Low-density access line, ARM-based 32-bit MCU with 16 or 32 KB Flash, 5 timers, ADC and 4 communication interfaces

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STM32F101x4, STM32F101x6

Electrical characteristics

Doc ID 15058 Rev 3

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5.3.7

Internal clock source characteristics

The parameters given in Table 23 are derived from tests performed under the ambient

temperature and VDD supply voltage conditions summarized in Table 8.

High-speed internal (HSI) RC oscillator

Low-speed internal (LSI) RC oscillator

Wakeup time from low-power mode

The wakeup times given in Table 25 are measured on a wakeup phase with an 8-MHz HSI

RC oscillator. The clock source used to wake up the device depends from the current

operating mode:

●

Stop or Standby mode: the clock source is the RC oscillator

●

Sleep mode: the clock source is the clock that was set before entering Sleep mode.

Table 23.

HSI oscillator characteristics(1)

1.

VDD = 3.3 V, TA = –40 to 105 °C unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fHSI

Frequency

8

MHz

ACCHSI

Accuracy of the HSI

oscillator

User-trimmed with the RCC_CR

register(2)

2.

Refer to application note AN2868 “STM32F10xxx internal RC oscillator (HSI) calibration” available from

the ST website www.st.com.

1(3)

3.

Guaranteed by design, not tested in production.

%

Factory-

calibrated(4)

4.

Based on characterization, not tested in production.

TA = –40 to 105 °C

–2

2.5

%

TA = –10 to 85 °C

–1.5

2.2

%

TA = 0 to 70 °C

–1.3

2

%

TA = 25 °C

–1.1

1.8

%

tsu(HSI)

(4)

HSI oscillator

startup time

12

µs

IDD(HSI)

(4)

HSI oscillator power

consumption

80

100

µA

Table 24.

LSI oscillator characteristics (1)

1.

VDD = 3 V, TA = –40 to 85 °C unless otherwise specified.

Symbol

Parameter

Min

Typ

Max

Unit

fLSI

(2)

2.

Based on characterization, not tested in production.

Frequency

30

40

60

kHz

tsu(LSI)

(3)

3.

Guaranteed by design, not tested in production.

LSI oscillator startup time

85

µs

IDD(LSI)

(3)

LSI oscillator power consumption

0.65

1.2

µA

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