STM32F101X4 datasheet(48/87 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32F101x4, STM32F101x6

48/87

DocID15058 Rev 6

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.

5.3.8

PLL characteristics

The parameters given in Table 26 are derived from tests performed under the ambient

temperature and VDD supply voltage conditions summarized in Table 8.

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

kHz

tsu(LSI)(3)

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 25. Low-power mode wakeup timings

Symbol

Parameter

Typ

Unit

tWUSLEEP(1)

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

Table 26. PLL characteristics

Symbol

Parameter

Value

Unit

Min(1)

Typ

Max(1)

fPLL_IN

PLL input clock(2)

18.0

MHz

PLL input clock duty cycle

fPLL_OUT

PLL multiplier output clock

MHz

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