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AN4080 Folha de dados(PDF) 28 Page - STMicroelectronics

Nome de Peças AN4080
Descrição Electrónicos  This application note is intended for system designers
PDF  35 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4080 Folha de dados(HTML) 28 Page - STMicroelectronics

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Reference design
AN4080
28/35
DocID023035 Rev 4
6.2
Component references
Note:
Depending on the microcontroller used, refer to the corresponding reference schematics.
Table 5. Mandatory components
Component
Reference
Value
Quantity
Comments
Microcontroller
U1, U2 or
U3
STM32F051R8,
STM32F058R8 or
STM32F072R8
1
64-pin package
Capacitor
C1/C2
100 nF
2
Ceramic capacitors (decoupling capacitors)
Capacitor
C3
10 nF
1
Ceramic capacitor (decoupling capacitor)
Capacitor
C5
1 μF
1
Used for VDDA
Capacitor
C6
4.7 μF
1
Used for VDD
Table 6. Optional components
Component
Reference
Value
Quantity
Comments
Resistor
R1
390
Ω
1
Used for HSE: the value depends on the crystal
characteristics.
This value is given only as a typical example.
Resistor
R2
10 K
Ω
1
Used for BOOT0 pin
Capacitor
C4
100 nF
1
Ceramic capacitor for RESET button
Capacitor
C13
4.7 μF
1
Used for VDDIO2
Capacitor
C12
100 μF
1
Ceramic capacitor (decoupling capacitor)
Capacitor
C7/C8
10 pF
2
Used for LSE: the value depends on the crystal
characteristics.
Capacitor
C9/C10
20 pF
2
Used for HSE: the value depends on the crystal
characteristics.
Quartz
X1
8 MHz
1
Used for HSE
Quartz
X2
32 kHz
1
Used for LSE
Battery
BT1
3V
1
If no external battery is used in the application, it is
recommended to connect VBAT externally to VDD
Switch
SW1
-
1
Used to select the correct boot mode.
Push-button
B1
-
1
Used as reset button
SWD connector CN1
FTSH-105-01-L-DV
1
Used for program/debug of the MCU



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