STM32F301R8U7TR(2014) View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
STM32F301R8U7TR
(Rev.:2014)
(Rev.:2014)
STMicroelectronics
STM32F301R8U7TR Datasheet PDF : 132 Pages
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Electrical characteristics
STM32F301x6 STM32F301x8
High-speed external clock generated from a crystal/ceramic resonator
The high-speed external (HSE) clock can be supplied with a 4 to 32 MHz crystal/ceramic
resonator oscillator. All the information given in this paragraph are based on design
simulation results obtained with typical external components specified in Table 41. 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).
Symbol
Table 41. HSE oscillator characteristics
Parameter
Conditions(1)
Min(2) Typ Max(2) Unit
fOSC_IN Oscillator frequency
RF Feedback resistor
-
-
During startup(3)
4
8
32 MHz
- 200 -
kï—
-
-
8.5
VDD=3.3 V, Rm= 30ï—,
CL=10 pF@8 MHz
-
0.4
-
IDD HSE current consumption
VDD=3.3 V, Rm= 45ï—,
CL=10 pF@8 MHz
-
0.5
-
VDD=3.3 V, Rm= 30ï—,
CL=10 pF@32 MHz
-
0.8
-
mA
VDD=3.3 V, Rm= 30ï—,
CL=10 pF@32 MHz
-
1
-
VDD=3.3 V, Rm= 30ï—,
CL=10 pF@32 MHz
-
1.5
-
gm Oscillator transconductance
tSU(HSE)(4) Startup time
Startup
VDD is stabilized
10
-
-
2
- mA/V
-
ms
1. Resonator characteristics given by the crystal/ceramic resonator manufacturer.
2. Guaranteed by design, not tested in production.
3. This consumption level occurs during the first 2/3 of the tSU(HSE) startup time.
4. tSU(HSE) is the startup time measured from the moment it is enabled (by software) to a stabilized 8 MHz
oscillation is reached. This value is measured for a standard crystal resonator and it can vary significantly
with the crystal manufacturer.
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