Datasheet

Electrical characteristics STM32F334x4 STM32F334x6 STM32F334x8
70/121 DocID025409 Rev 8
Low-speed internal (LSI) RC oscillator
6.3.9 PLL characteristics
The parameters given in Table 42 are derived from tests performed under ambient
temperature and supply voltage conditions summarized in Table 19.
Table 41. LSI oscillator characteristics
(1)
1. V
DDA
= 3.3 V, T
A
= –40 to 105 °C unless otherwise specified.
Symbol Parameter Min. Typ. Max. Unit
f
LSI
Frequency 30 40 50 kHz
t
su(LSI)
(2)
2. Guaranteed by design, not tested in production.
LSI oscillator startup time - - 85 µs
I
DD(LSI)
(2)
LSI oscillator power consumption - 0.75 1.2 µA
Table 42. PLL characteristics
Symbol Parameter
Value
Unit
Min. Typ. Max.
f
PLL_IN
PLL input clock
(1)
1. Take care of using the appropriate multiplier factors so as to have PLL input clock values compatible with
the range defined by f
PLL_OUT
.
1
(2)
-24
(2)
MHz
PLL input clock duty cycle 40
(2)
-60
(2)
%
f
PLL_OUT
PLL multiplier output clock 16
(2)
-72MHz
t
LOCK
PLL lock time - - 200
(2)
µs
Jitter Cycle-to-cycle jitter - - 300
(2)
2. Guaranteed by design, not tested in production.
ps
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