Datasheet

DocID025147 Rev 7 81/138
STM32F302x6 STM32F302x8 Electrical characteristics
117
Low-speed internal (LSI) RC oscillator
6.3.9 PLL characteristics
The parameters given in Table 45 are derived from tests performed under ambient
temperature and supply voltage conditions summarized in Table 23.
Table 44. 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.
LSI oscillator startup time - - 85 µs
I
DD(LSI)
(2)
LSI oscillator power consumption - 0.75 1.2 µA
Table 45. 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.
ps
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