STM32H753II datasheet(233/361 Pages) STMICROELECTRONICS

233 / 361 page

DS12117 Rev 8

233/360

STM32H753xI

Electrical characteristics (rev V)

318

64 MHz high-speed internal RC oscillator (HSI)

4 MHz low-power internal RC oscillator (CSI)

∆fHSI = ACCHSI48_REL + ∆VDD.

5. These values are obtained by using the formula: (Freq(3.6V) - Freq(3.0V)) / Freq(3.0V) or (Freq(3.6V) - Freq(1.62V)) /

Freq(1.62V).

6. Jitter measurements are performed without clock source activated in parallel.

Table 143. HSI oscillator characteristics(1)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fHSI

HSI frequency

VDD=3.3 V, TJ=30 °C

63.7(2)

64.3(2)

MHz

TRIM

HSI user trimming step

Trimming is not a multiple

of 32

0.24

0.32

Trimming is 128, 256 and

384

−5.2

−1.8

Trimming is 64, 192, 320

and 448

−1.4

−0.8

Other trimming are a

multiple of 32 (not

including multiple of 64

and 128)

−0.6

−0.25

DuCy(HSI) Duty Cycle

ΔVDD (HSI)

HSI oscillator frequency drift over

VDD (reference is 3.3 V)

VDD=1.62 to 3.6 V

−0.12

0.03

ΔTEMP (HSI)

HSI oscillator frequency drift over

temperature (reference is 64 MHz)

TJ=-20 to 105 °C

−1(3)

-1(3)

TJ=−40 to TJmax °C

−2(3)

-1(3)

tsu(HSI)

HSI oscillator start-up time

1.4

µs

tstab(HSI)

HSI oscillator stabilization time

at 1% of target frequency

µs

IDD(HSI)

HSI oscillator power consumption

300

400

µA

1. Guaranteed by design unless otherwise specified.

2. Guaranteed by test in production.

3. Guaranteed by characterization.

Table 144. CSI oscillator characteristics(1)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fCSI

CSI frequency

VDD=3.3 V, TJ=30 °C

3.96(2)

44.04(2)

MHz

TRIM

Trimming step

0.35

DuCy(CSI)

Duty Cycle

∆TEMP (CSI)

CSI oscillator frequency drift over

temperature

TJ = 0 to 85 °C

−3.7(3)

4.5(3)

TJ = −40 to 125 °C

−11(3)

7.5(3)

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