Datasheet

Electrical characteristics STM32F030x4/x6/x8/xC
56/93 DS9773 Rev 4
6.3.8 Internal clock source characteristics
The parameters given in Table 35 are derived from tests performed under ambient
temperature and supply voltage conditions summarized in Table 21: General operating
conditions. The provided curves are characterization results, not tested in production.
High-speed internal (HSI) RC oscillator
High-speed internal 14 MHz (HSI14) RC oscillator (dedicated to ADC)
Low-speed internal (LSI) RC oscillator
Table 35. HSI oscillator characteristics
(1)
1. V
DDA
= 3.3 V, T
A
= -40 to 85°C unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Unit
f
HSI
Frequency - - 8 - MHz
TRIM HSI user trimming step - - - 1
(2)
2. Guaranteed by design, not tested in production.
%
DuCy
HSI
Duty cycle - 45
(2)
-55
(2)
%
ACC
HSI
Accuracy of the HSI oscillator
(factory calibrated)
T
A
= -40 to 85°C - ±5 - %
T
A
= 25°C - ±1
(3)
3. With user calibration.
-%
t
SU(HSI)
HSI oscillator startup time - 1
(2)
-2
(2)
µs
I
DDA(HSI)
HSI oscillator power
consumption
--80-µA
Table 36. HSI14 oscillator characteristics
(1)
1. V
DDA
= 3.3 V, T
A
= -40 to 85 °C unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Unit
f
HSI14
Frequency - - 14 - MHz
TRIM HSI14 user-trimming step - - - 1
(2)
2. Guaranteed by design, not tested in production.
%
DuCy
(HSI14)
Duty cycle - 45
(2)
-55
(2)
%
ACC
HSI14
Accuracy of the HSI14
oscillator (factory calibrated)
T
A
= –40 to 85 °C - ±5 - %
t
su(HSI14)
HSI14 oscillator startup time - 1
(2)
-2
(2)
µs
I
DDA(HSI14)
HSI14 oscillator power
consumption
- - 100 - µA
Table 37. LSI oscillator characteristics
(1)
Symbol Parameter Min Typ Max Unit
f
LSI
Frequency 30 40 50 kHz