STM32F070CB datasheet(50/83 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32F070CB/RB/C6/F6

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DocID027114 Rev 3

6.3.8

Internal clock source characteristics

The parameters given in Table 34 are derived from tests performed under ambient

temperature and supply voltage conditions summarized in Table 20: General operating

conditions. The provided curves are characterization results, not tested in production.

High-speed internal (HSI) RC oscillator

High-speed internal 14 MHz (HSI14) RC oscillator (dedicated to ADC)

Low-speed internal (LSI) RC oscillator

Table 34. HSI oscillator characteristics(1)

1. VDDA = 3.3 V, TA = -40 to 85°C unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fHSI

Frequency

MHz

TRIM

HSI user trimming step

1(2)

2. Guaranteed by design, not tested in production.

DuCyHSI

Duty cycle

45(2)

-55(2)

ACCHSI

Accuracy of the HSI oscillator

(factory calibrated)

TA = -40 to 85°C

±5

TA = 25°C

±1(3)

3. With user calibration.

tSU(HSI)

HSI oscillator startup time

1(2)

-2(2)

µs

IDDA(HSI)

HSI oscillator power

consumption

µA

Table 35. HSI14 oscillator characteristics(1)

1. VDDA = 3.3 V, TA = -40 to 85 °C unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fHSI14

Frequency

MHz

TRIM

HSI14 user-trimming step

1(2)

2. Guaranteed by design, not tested in production.

DuCy(HSI14) Duty cycle

45(2)

-55(2)

ACCHSI14

Accuracy of the HSI14

oscillator (factory calibrated)

TA = –40 to 85 °C

±5

tsu(HSI14)

HSI14 oscillator startup time

1(2)

-2(2)

µs

IDDA(HSI14)

HSI14 oscillator power

consumption

100

µA

Table 36. LSI oscillator characteristics(1)

Symbol

Parameter

Min

Typ

Max

Unit

fLSI

Frequency

kHz

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