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STM32L100RB Datasheet(PDF) 60 Page - STMicroelectronics

Part # STM32L100RB
Description  Ultra-low-power platform
PDF  103 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32L100RB Datasheet(HTML) 60 Page - STMicroelectronics

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Electrical characteristics
STM32L100C6 STM32L100R8/RB
60/103
DocID024295 Rev 5
Low-speed external user clock generated from an external source
The characteristics given in the following table result from tests performed using a low-
speed external clock source, and under ambient temperature and supply voltage conditions
summarized in Table 12.
Figure 12. Low-speed external clock source AC timing diagram
High-speed external clock generated from a crystal/ceramic resonator
The high-speed external (HSE) clock can be supplied with a 1 to 24 MHz crystal/ceramic
resonator oscillator. All the information given in this paragraph are based on
characterization results obtained with typical external components specified in Table 27. In
the application, the resonator and the load capacitors have to be placed as close as
possible to the oscillator pins in order to minimize output distortion and startup stabilization
time. Refer to the crystal resonator manufacturer for more details on the resonator
characteristics (frequency, package, accuracy).
Table 26. Low-speed external user clock characteristics(1)
1. Guaranteed by design.
Symbol
Parameter
Min
Typ
Max
Unit
fLSE_ext
User external clock source frequency
1
32.768
1000
kHz
VLSEH
OSC32_IN input pin high level voltage
0.7VDD
-VDD
-
VLSEL
OSC32_IN input pin low level voltage
VSS
-0.3VDD
-
tw(LSEH)
tw(LSEL)
OSC32_IN high or low time
465
-
-
ns
tr(LSE)
tf(LSE)
OSC32_IN rise or fall time
-
-
10
CIN(LSE)
OSC32_IN input capacitance
-
0.6
-
pF
Table 27. HSE oscillator characteristics(1)(2)
Symbol
Parameter
Conditions
Min Typ
Max
Unit
fOSC_IN Oscillator frequency
-
1
24
MHz
RF
Feedback resistor
-
200
-
k
Ω



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