STM32F101ZC datasheet(55/112 Pages) STMICROELECTRONICS

55 / 112 page

STM32F101xC, STM32F101xD, STM32F101xE

Electrical characteristics

Doc ID 14610 Rev 8

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Low-speed internal (LSI) RC oscillator

Wakeup time from low-power mode

The wakeup times given in Table 27 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 ambient temperature and VDD supply

voltage conditions summarized in Table 10.

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

the ST website www.st.com.

Guaranteed by design, not tested in production.

Based on characterization, not tested in production.

Table 26.

LSI oscillator characteristics (1)

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

Symbol

Parameter

Min

Typ

Max

Unit

fLSI

(2)

Based on characterization, not tested in production.

Frequency

kHz

tsu(LSI)

(3)

Guaranteed by design, not tested in production.

LSI oscillator startup time

µs

IDD(LSI)

(3)

LSI oscillator power consumption

0.65

1.2

µA

Table 27.

Low-power mode wakeup timings

Symbol

Parameter

Typ

Unit

tWUSLEEP

(1)

The wakeup times are measured from the wakeup event to the point at which the user application code

reads the first instruction.

Wakeup from Sleep mode

1.8

µs

tWUSTOP

(1)

Wakeup from Stop mode (regulator in run mode)

3.6

µs

Wakeup from Stop mode (regulator in low-power mode)

5.4

tWUSTDBY

(1)

Wakeup from Standby mode

µs

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