STM32F378CC datasheet(77/131 Pages) STMICROELECTRONICS

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STM32F378xx

Electrical characteristics

110

Figure 17. HSI oscillator accuracy characterization results

Low-speed internal (LSI) RC oscillator

6.3.8

PLL characteristics

The parameters given in Table 42 are derived from tests performed under ambient

temperature and supply voltage conditions summarized in Table 22.

Table 41. LSI oscillator characteristics(1)

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

Symbol

Parameter

Min

Typ

Max

Unit

fLSI

Frequency

kHz

tsu(LSI)(2)

2. Guaranteed by design.

LSI oscillator startup time

µs

IDD(LSI)(2) LSI oscillator power consumption

0.75

1.2

µA

Table 42. PLL characteristics

Symbol

Parameter

Value

Unit

Min

Typ

Max

fPLL_IN

PLL input clock(1)

1. Take care of using the appropriate multiplier factors so as to have PLL input clock values compatible with

the range defined by fPLL_OUT.

1(2)

-24(2)

MHz

PLL input clock duty cycle

40(2)

-60(2)

fPLL_OUT

PLL multiplier output clock

16(2)

-72

MHz

tLOCK

PLL lock time

200(2)

2. Guaranteed by design.

µs

Jitter

Cycle-to-cycle jitter

300(2)

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