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| STM32F101RBH6 Datasheet, PDF (49/90 Pages) STMicroelectronics – Medium-density access line, ARM-based 32-bit MCU with 64 or 128 KB Flash, 6 timers, ADC and 7 communication interfaces | |||
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STM32F101x8, STM32F101xB
Electrical characteristics
Figure 22. Typical application with a 32.768 kHz crystal
5.3.7
Resonator with
integrated capacitors
CL1
OSC32_IN
32.768 KH z
resonator
RF
OSC32_OU T
CL2
Bias
controlled
gain
fLSE
STM32F10xxx
ai14129b
Internal clock source characteristics
The parameters given in Table 23 are derived from tests performed under the ambient
temperature and VDD supply voltage conditions summarized in Table 8.
High-speed internal (HSI) RC oscillator
Table 23. HSI oscillator characteristics(1)
Symbol
Parameter
Conditions
Min Typ Max Unit
fHSI
Frequency
DuCy(HSI) Duty cycle
8
MHz
45
55 %
User-trimmed with the RCC_CR
register(2)
1(3)
%
ACCHSI
Accuracy of the HSI
oscillator
Factory-
calibrated
(4) (5)
tsu(HSI)(4)
HSI oscillator
startup time
TA = â40 to 105 °C â2
TA = â10 to 85 °C â1.5
TA = 0 to 70 °C
â1.3
TA = 25 °C
â1.1
1
2.5 %
2.2 %
2
%
1.8 %
2
µs
IDD(HSI)(4)
HSI oscillator power
consumption
80 100 µA
1. VDD = 3.3 V, TA = â40 to 105 °C unless otherwise specified.
2. Refer to application note AN2868 âSTM32F10xxx internal RC oscillator (HSI) calibrationâ available from
the ST website www.st.com.
3. Guaranteed by design, not tested in production.
4. Based on characterization, not tested in production.
5. The actual frequency of HSI oscillator may be impacted by a reflow, but does not drift out of the specified
range.
DocID13586 Rev 16
49/90
89
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