STM32F058C8 Datasheet, PDF (57/104 Pages) STMicroelectronics – Advanced ARM-based 32-bit MCU, 64 KB Flash, 11 timers, ADC, DAC & comm. interfaces, 1.8 V

STM32F058C8 STM32F058R8 STM32F058T8
Electrical characteristics
Symbol
Table 33. LSE oscillator characteristics (f_LSE = 32.768 kHz)
Parameter
Conditions⁽¹⁾
Min⁽²⁾ Typ Max⁽²⁾ Unit
LSEDRV[1:0]=00
lower driving capability
5
-
-
g_m
Oscillator
transconductance
LSEDRV[1:0]= 01
medium low driving capability
LSEDRV[1:0] = 10
medium high driving capability
8
-
15
-
-
µA/V
-
LSEDRV[1:0]=11
higher driving capability
25
-
-
t_SU(LSE)(3)
Startup time
V_DDIOx is stabilized
-
2
-
s
1. Refer to the note and caution paragraphs below the table, and to the application note AN2867 “Oscillator design guide for
ST microcontrollers”.
2. Guaranteed by design, not tested in production.
3.
rte^Sa^Uc^(Lh^Se^Ed⁾.
is the startup
This value is
time measured
measured for a
from the moment it is enabled (by software)
standard crystal and it can vary significantly
to a stabilized 32.768 kHz oscillation
with the crystal manufacturer
is
Note:
For information on selecting the crystal, refer to the application note AN2867 “Oscillator
design guide for ST microcontrollers” available from the ST website www.st.com.
Figure 15. Typical application with a 32.768 kHz crystal
5HVRQDWRUZLWKLQWHJUDWHG
FDSDFLWRUV
&_/
26&B,1
I_/6(
N+]
UHVRQDWRU
'ULYH
SURJUDPPDEOH
DPSOLILHU
26&B287
&_/
Note:
6.3.7
069
An external resistor is not required between OSC32_IN and OSC32_OUT and it is forbidden
to add one.
Internal clock source characteristics
The parameters given in Table 34 are derived from tests performed under ambient
temperature and supply voltage conditions summarized in Table 19: General operating
conditions. The provided curves are characterization results, not tested in production.
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