STM32F107VCT6 Datasheet, PDF (46/103 Pages) STMicroelectronics – 64 to 256 Kbytes of Flash memory

Electrical characteristics
STM32F105xx, STM32F107xx
Figure 14. High-speed external clock source AC timing diagram
VHSEH
90%
10%
VHSEL
tr(HSE)
tf(HSE)
THSE
External
clock source
fHSE_ext
OSC _IN
tW(HSE)
IL
STM32F10xxx
Figure 15. Low-speed external clock source AC timing diagram
tW(HSE) t
ai14127b
VLSEH
VLSEL
90%
10%
tr(LSE)
tf(LSE)
TLSE
tW(LSE)
tW(LSE) t
External
clock source
fLSE_ext
OSC32_IN
IL
STM32F10xxx
ai14140c
High-speed external clock generated from a crystal/ceramic resonator
The high-speed external (HSE) clock can be supplied with a 3 to 25 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 22. 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).
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Doc ID 15274 Rev 6