STM32F103T8U7 Datasheet, PDF (52/105 Pages) STMicroelectronics – Medium-density performance line ARM-based 32-bit MCU with 64 or 128 KB Flash, USB, CAN, 7 timers, 2 ADCs, 9 com. interfaces

Electrical characteristics
STM32F103x8, STM32F103xB
Figure 22. High-speed external clock source AC timing diagram
VHSEH
VHSEL
90%
10%
tr(HSE)
tf(HSE)
THSE
EXTER NAL
fHSE_ext
CLOCK SOURC E
OSC _IN
tW(HSE)
IL
STM32F103xx
Figure 23. Low-speed external clock source AC timing diagram
tW(HSE) t
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VLSEH
VLSEL
90%
10%
tr(LSE)
tf(LSE)
TLSE
tW(LSE)
tW(LSE) t
EXTER NAL
CLOCK SOURC E
fLSE_ext
OSC32_IN
IL
STM32F103xx
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High-speed external clock generated from a crystal/ceramic resonator
The high-speed external (HSE) clock can be supplied with a 4 to 16 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 13587 Rev 15