Datasheet

Electrical characteristics STM32H743xI
122/226 DocID030538 Rev 3
Low-speed internal (LSI) RC oscillator
6.3.10 PLL characteristics
The parameters given in Table 49 are derived from tests performed under temperature and
V
DD
supply voltage conditions summarized in Table 23: General operating conditions.
Table 48. LSI oscillator characteristics
Symbol Parameter Conditions Min Typ Max Unit
f
LSI
LSI frequency
V
DD
= 3.3 V,
T
J
= 25 °C (after
calibration)
31.4 32 32.6
kHz
T
J
= –40 to 105 °C,
V
DD
= 1.62 to 3.6 V
29.76 - 33.60
t
su(LSI)
(1)
1. Guaranteed by design.
LSI oscillator startup time - - 80 130
µs
t
stab(LSI)
(1)
LSI oscillator stabilization
time (5% of final value)
- - 120 170
I
DD(LSI)
(1)
LSI oscillator power
consumption
- - 130 280 nA
Table 49. Main PLL characteristics
(1)
Symbol Parameter Conditions Min Typ Max Unit
f
PLL_IN
PLL input clock - 2 - 16 MHz
PLL input clock duty cycle - 10 - 90 %
f
PLL_P_OUT
PLL multiplier output clock P
Voltage scaling range 1 1.5 - 400
(2)
MHz
Voltage scaling range 2 1.5 - 300
Voltage scaling range 3 1.5 - 200
f
PLL_Q_OUT
PLL multiplier output clock Q/R
Voltage scaling range 1 1.5 - 400
(2)
Voltage scaling range 2 1.5 - 300
Voltage scaling range 3 1.5 - 200
f
VCO_OUT
PLL VCO output - 192 - 836
t
LOCK
PLL lock time
Normal mode - 50
(3)
150
(3)
µs
Sigma-delta mode
(CKIN 8 MHz)
-58
(3)
166
(3)
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