CD00001237 Datasheet, PDF (76/105 Pages) STMicroelectronics – 8-bit MCUs with A/D converter

ST6215C ST6225C
CLOCK AND TIMING CHARACTERISTICS (Cont’d)
Figure 52. Typical RC Oscillator frequency vs.
V_DD
fosc [MHz]
12
10
8
Rnet=22KOhm
Rnet=47KOhm
Rnet=100KOhm
Rnet=220KOhm
Rnet=470KOhm
6
4
2
0
3
4
5
6
VDD [V]
Figure 53. Typical RC Oscillator frequency vs.
Temperature (V_DD = 5V)
fosc [MHz]
10
8
6
Rnet=22KOhm
Rnet=47KOhm
Rnet=100KOhm
Rnet=220KOhm
Rnet=470KOhm
4
2
0
-40
25
95
125
Ta [°C]
11.5.5 Oscillator Safeguard (OSG) and Low Frequency Auxiliary Oscillator (LFAO)
Symbol
f_LFAO
f_OSG
Parameter
Low Frequency Auxiliary Oscillator
Frequency ¹⁾
Internal Frequency with OSG ena-
bled
Conditions
T_A=25° C, V_DD=5.0 V
T_A=25° C, V_DD=3.3 V
T_A=25° C, V_DD=4.5 V
T_A=25° C, V_DD=3.3 V
Min
Typ
Max
200
350
800
86
150
340
4
2
Figure 54. Typical LFAO Frequencies
fosc [kHz]
600
500
400
Ta=-40°C
Ta=25°C
Ta=125°C
300
200
100
0
3
4
5
6
VDD [V]
Unit
kHz
MHz
Note:
1. Data based on characterization results.
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