Electrical characteristics
STM32F103xx
Figure 11. High-speed external clock source AC timing diagram
V
HSEH
90%
10%
V
HSEL
t
t
t
W(HSE)
t
t
W(HSE)
r(HSE)
f(HSE)
T
HSE
f
HSE_ext
EXTERNAL
CLOCK SOURCE
I
L
OSC _IN
STM32F103xx
ai14143
Figure 12. Low-speed external clock source AC timing diagram
V
LSEH
90%
10%
V
LSEL
t
t
t
W(LSE)
t
t
W(LSE)
r(LSE)
f(LSE)
T
LSE
f
LSE_ext
EXTERNAL
CLOCK SOURCE
I
L
OSC32_IN
STM32F103xx
ai14144b
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