Datasheet

DocID15056 Rev 5 43/80
STM32F102x8, STM32F102xB Electrical characteristics
79
Figure 16. High-speed external clock source AC timing diagram
Figure 17. Low-speed external clock source AC timing diagram
ai14975b
OSC _I N
STM32F102xx
V
HSEH
t
f(HSE)
t
W(HSE)
I
L
90%
10%
T
HSE
t
t
r(HSE)
t
W(HSE)
f
HSE_ext
V
HSEL
External
clock source
ai14976b
OSC32_IN
STM32F102xx
V
LSEH
t
f(LSE)
t
W(LSE)
I
L
90%
10%
T
LSE
t
t
r(LSE)
t
W(LSE)
f
LSE_ext
V
LSEL
External
clock source