STM32F051x Electrical characteristics
Doc ID 022265 Rev 3 75/105
Figure 20. I/O AC characteristics definition
ai14131
10%
90%
50%
t
r(IO)out
OUTPUT
EXT ERNAL
ON 50pF
Maximum frequency is achieved if (t
r
+ t
f
) ≤ 2/3)T and if the duty cycle is (45-55%)
10 %
50%
90%
when loaded by 50pF
T
t
r(IO)out
