AN3320 datasheet(24/29 Pages) STMICROELECTRONICS

24 / 29 page

Reference design

AN3320

24/29

Doc ID 18267 Rev 2

6.2

Component references

Table 4.

Mandatory components

Id Components name

Reference

Quantity

Comments

1 Microcontroller

STM32F207IG(H6)

176-pin package

2 Capacitors

100 nF

Ceramic capacitors (decoupling

capacitors)

3 Capacitor

10 µF

Ceramic capacitor (decoupling capacitor)

Table 5.

Optional components

Components name

Reference

Quantity

Comments

1Resistor

10 k

pull-up and pull-down for JTAG and Boot mode.

2Resistor

390

Used for HSE: the value depends on the

crystal characteristics.

This resistor value is given only as a typical

example.

3Resistor

Used for LSE: the value depends on the crystal

characteristics.

This resistor value is given only as a typical

example.

Capacitor

100 nF

Ceramic capacitor.

Capacitor

2 pF

Used for LSE: the value depends on the crystal

characteristics.

Capacitor

1 µF

Used for VDDA and VREF.

Capacitor

2.2 µF

Used for internal regulator when it is on.

Capacitor

20 pF

Used for HSE: the value depends on the

crystal characteristics.

Quartz

25 MHz

Used for HSE.

Quartz

32 kHz

Used for LSE.

JTAG connector

HE10

Transil diode

5 V-400 W

For JTAG protection.

Resistor

22 Ohm

For JTAG protection.

Battery

3V3

If no external battery is used in the application,

it is recommended to connect VBAT externally

to VDD.

Switch

3V3

Used to select the right boot mode.

Push-button

Jumper

3 pins

Used to select VBAT source, and REGOFF pin.

Debug trace

connector

FTSH-110-

01-L-DV

Used for JTAG/SWD and debug trace.

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