STM32L051R8 datasheet(71/133 Pages) STMICROELECTRONICS

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DS10184 Rev 10

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STM32L051x6 STM32L051x8

Electrical characteristics

Low-speed internal (LSI) RC oscillator

Multi-speed internal (MSI) RC oscillator

Table 43. LSI oscillator characteristics

Symbol

Parameter

Min

Typ

Max

Unit

fLSI(1)

1. Guaranteed by test in production.

LSI frequency

kHz

DLSI(2)

2. This is a deviation for an individual part, once the initial frequency has been measured.

LSI oscillator frequency drift

0°C

≤TA ≤ 85°C

-10

tsu(LSI)(3)

3. Guaranteed by design.

LSI oscillator startup time

200

µs

IDD(LSI)(3) LSI oscillator power consumption

400

510

Table 44. MSI oscillator characteristics

Symbol

Parameter

Condition

Typ

Max Unit

fMSI

Frequency after factory calibration, done at

VDD= 3.3 V and TA = 25 °C

MSI range 0

65.5

kHz

MSI range 1

131

MSI range 2

262

MSI range 3

524

MSI range 4

1.05

MHz

MSI range 5

2.1

MSI range 6

4.2

ACCMSI

Frequency error after factory calibration

±0.5

DTEMP(MSI)(1)

MSI oscillator frequency drift

0 °C

≤TA ≤85 °C

±3-

MSI oscillator frequency drift

VDD = 3.3 V, − 40 °C ≤TA ≤110 °C

MSI range 0

− 8.9

+7.0

MSI range 1

− 7.1

+5.0

MSI range 2

− 6.4

+4.0

MSI range 3

− 6.2

+3.0

MSI range 4

− 5.2

+3.0

MSI range 5

− 4.8

+2.0

MSI range 6

− 4.7

+2.0

DVOLT(MSI)(1)

MSI oscillator frequency drift

1.65 V

≤VDD ≤3.6 V, TA = 25 °C

2.5

%/V

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