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STM32L021D4 Datasheet(PDF) 69 Page - STMicroelectronics

No. de pieza STM32L021D4
Descripción Electrónicos  Access line ultra-low-power 32-bit MCU Arm®-based Cortex®-M0, 16KB Flash, 2KB SRAM, 512B EEPROM, ADC, AES
PDF  114 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32L021D4 Datasheet(HTML) 69 Page - STMicroelectronics

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STM32L021x4
Electrical characteristics
93
6.3.8
PLL characteristics
The parameters given in Table 40 are derived from tests performed under ambient
temperature and VDD supply voltage conditions summarized in Table 17.
tSU(MSI)
MSI oscillator startup time
MSI range 0
30
-
µs
MSI range 1
20
-
MSI range 2
15
-
MSI range 3
10
-
MSI range 4
6
-
MSI range 5
5
-
MSI range 6,
Voltage range 1
and 2
3.5
-
MSI range 6,
Voltage range 3
5-
tSTAB(MSI)(2) MSI oscillator stabilization time
MSI range 0
-
40
µs
MSI range 1
-
20
MSI range 2
-
10
MSI range 3
-
4
MSI range 4
-
2.5
MSI range 5
-
2
MSI range 6,
Voltage range 1
and 2
-2
MSI range 3,
Voltage range 3
-3
fOVER(MSI)
MSI oscillator frequency overshoot
Any range to
range 5
-4
MHz
Any range to
range 6
-6
1. This is a deviation for an individual part, once the initial frequency has been measured.
2. Guaranteed by characterization results, not tested in production.
Table 39. MSI oscillator characteristics (continued)
Symbol
Parameter
Condition
Typ
Max Unit
Table 40. PLL characteristics
Symbol
Parameter
Value
Unit
Min
Typ
Max(1)
fPLL_IN
PLL input clock(2)
2-
24
MHz
PLL input clock duty cycle
45
-
55
%



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