STM8L051F3 datasheet(63/96 Pages) STMICROELECTRONICS

63 / 96 page

DS9178 Rev 4

63/96

STM8L051F3

Electrical parameters

Internal clock sources

Subject to general operating conditions for VDD, and TA.

High speed internal RC oscillator (HSI)

In the following table, data is based on characterization results, not tested in production,

unless otherwise specified.

Figure 14. Typical HSI frequency vs VDD

Table 30. 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)

-2.5

1(2)

1.8 V

≤ VDD ≤ 3.6 V,

-40 °C

≤ TA ≤ 85 °C

-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 85 °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.

4. Guaranteed by design.

13.0

13.5

14.0

14.5

15.0

15.5

16.0

16.5

17.0

17.5

18.0

-40°C

25°C

85°C

VDD [V]

1.8 1.95

2.1

2.25

2.4

2.55

2.7

2.85

3.15

3.3 3.45

3.6

ai18218c

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