STM8L151X6 datasheet(92/146 Pages) STMICROELECTRONICS

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Electrical parameters

STM8L151x6/8 STM8L152x6/8

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DocID17943 Rev 10

Figure 23. LSE oscillator circuit diagram

Internal clock sources

Subject to general operating conditions for VDD, and TA.

High speed internal RC oscillator (HSI)

In the following table, data are based on characterization results unless otherwise specified.

tSU(LSE) is the startup time measured from the moment it is enabled (by software) to a stabilized 32.768 kHz oscillation.

This value is measured for a standard crystal resonator and it can vary significantly with the crystal manufacturer.

Table 33. HSI oscillator characteristics

Symbol

Parameter

Conditions(1)

Min.

Typ.

Max.

Unit

fHSI

Frequency

VDD = 3.0 V

MHz

ACCHSI

Accuracy of HSI

oscillator (factory

calibrated)

VDD = 3.0 V, TA = 25 °C

-1 (2)

1 (2)

VDD = 3.0 V, 0 °C ≤TA ≤ 55 °C

-1.5

1.5

VDD = 3.0 V, -10 °C ≤TA ≤ 70 °C

-2

VDD = 3.0 V, -10 °C ≤TA ≤ 85 °C

-2.5

VDD = 3.0 V, -10 °C ≤TA ≤ 125 °C

-4.5

1.65 V

≤VDD ≤ 3.6 V,

-40 °C

≤TA ≤ 125 °C

-4.5

TRIM

HSI user trimming

step(3)

Trimming code

≠ multiple of 16

0.4

0.7

Trimming code = multiple of 16

± 1.5

tsu(HSI)

HSI oscillator setup

time (wakeup time)

3.7

6 (4)

µs

IDD(HSI)

HSI oscillator power

consumption

100

140(4)

µA

1. VDD = 3.0 V, TA = -40 to 125 °C unless otherwise specified.

2. Tested in production.

3. The trimming step differs depending on the trimming code. It is usually negative on the codes which are multiples of 16

(0x00, 0x10, 0x20, 0x30...0xE0). Refer to the AN3101 “STM8L15x internal RC oscillator calibration” application note for

more details.

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