STM32F100C4 datasheet(49/84 Pages) STMICROELECTRONICS

49 / 84 page

STM32F100x4, STM32F100x6, STM32F100x8, STM32F100xB

Electrical characteristics

Doc ID 16455 Rev 2

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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.

All timings are derived from tests performed under the ambient temperature and VDD supply

voltage conditions summarized in Table 8.

Table 23.

HSI oscillator characteristics(1)(2)

Guaranteed by design, not tested in production.

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

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fHSI

Frequency

MHz

ACCHSI Accuracy of HSI oscillator

TA = –40 to 105 °C

–2.7

TA = –10 to 85 °C

–2

2.5

TA = 0 to 70 °C

–2

2.5

TA = 25 °C

–0.7

tsu(HSI)

HSI oscillator startup time

µs

IDD(HSI) HSI oscillator power consumption

100

µA

Table 24.

LSI oscillator characteristics (1)

VDD = 3 V, TA = –40 to 105 °C °C unless otherwise specified.

Symbol

Parameter

Min

Typ

Max

Unit

fLSI

Frequency

kHz

tsu(LSI)

(2)

Guaranteed by design, not tested in production.

LSI oscillator startup time

µs

IDD(LSI)

(2)

LSI oscillator power consumption

0.65

1.2

µA

Table 25.

Low-power mode wakeup timings

Symbol

Parameter

Typ

Unit

tWUSLEEP

(1)

Wakeup from Sleep mode

1.8

µs

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