STMicroelectronics STM32F412G-DISCO Technical documentation - User Manual - A detailed description of board elements

Introduction

UM2032

User manual

Discovery kit with STM32F412ZG MCU

The 32F412GDISCOVERY discovery kit is a complete demonstration and development
platform for STMicroelectronics ARM
microcontroller. This microcontroller features four I
ports with two multiplexed full-duplex I

®

Cortex

2

®

-M4 core-based STM32F412ZGT6

2

C buses, four USART ports, five SPI

S buses, SDIO interface, USB OTG full-speed 2.0
port, two CAN buses, FMC parallel interface, two digital filters for sigma-delta modulators,
PDM interface for two digital microphones, one 12-bit ADC, dual Quad-SPI interface, JTAG
and SWD debugging support. This discovery kit offers everything required for users to get
started quickly and develop applications easily.

A full range of hardware features on the board helps users to evaluate on-board peripherals
such as: USB OTG FS, microSD

™

card, full-duplex I2S with an audio codec and stereo jack
for headset including analog microphone, DFSDM with a pair of ST-MEMS digital
microphones on board, Quad-SPI Flash memory device, 1.54" TFT LCD using FMC
interface with capacitive touch panel.
The Arduino

™

Uno V3 compatible connectors expand the functionality with a wide choice of
specialized shields. The extension connectors allow easy connection of a daughterboard for
specific customer applications. The integrated ST-LINK/V2-1 provides an embedded
in-circuit debugger and programmer for the STM32.

Figure 1. 32F412GDISCOVERY (top view) Figure 2. 32F412GDISCOVERY (bottom view)

1. Pictures are not contractual.

November 2016 DocID029078 Rev 2 1/48

www.st.com

1

Contents UM2032

Contents

1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2 Demonstration software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3 Product marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5 Technology partner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

6 Hardware layout and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

6.1 32F412GDISCOVERY discovery kit mechanical drawing . . . . . . . . . . . . .11

6.2 Embedded ST-LINK/V2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

6.2.1 Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

6.2.2 ST-LINK/V2-1 firmware upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

6.3 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

6.3.1 Power supply sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

6.3.2 STM32 power supply options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

6.3.3 Modification of STM32 voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

6.3.4 Supplying the 32F412GDISCOVERY through

the ST-LINK/V2-1 USB port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

6.3.5 Programming/debugging when the power supply

is not from ST-LINK/V2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

6.3.6 Measurement of current IDD drawn by the microcontroller . . . . . . . . . . 15

6.4 Clock source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

6.4.1 HSE clock source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

6.4.2 LSE clock source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

6.5 Reserved use of solder bridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

6.6 Reset source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

6.7 Boot options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

6.8 Audio codec . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

6.8.1 Stereo headset and headphone jack . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

6.8.2 Loudspeaker output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

6.9 Digital microphones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2/48 DocID029078 Rev 2

UM2032 Contents

6.10 USB OTG FS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

6.10.1 32F412GDISCOVERY is USB device . . . . . . . . . . . . . . . . . . . . . . . . . . 21

6.10.2 32F412GDISCOVERY is USB host . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

6.11 microSD card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

6.12 I

2

C extension connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

6.13 Quad-SPI NOR Flash memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

6.14 Virtual COM port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

6.15 Arduino Uno V3 connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

6.16 Extension connectors P1 and P2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

6.17 LCD display, backlight and touch panel . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6.17.1 LCD display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6.17.2 LCD signal access (CN7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

6.17.3 Backlight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

6.17.4 Touch panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

6.18 Joystick and LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

7 Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

7.1 I2C extension connector CN10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

7.2 USB OTG FS Micro-AB connector CN3 . . . . . . . . . . . . . . . . . . . . . . . . . . 30

7.3 microSD connector CN13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

7.4 ST-LINK/V2-1 USB Micro-B connector CN6 . . . . . . . . . . . . . . . . . . . . . . 31

Appendix A Schematics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Appendix B Federal Communications Commission (FCC)

and Industry Canada (IC) Compliance Statements . . . . . . . . . . . . . 45

B.1 FCC Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

B.1.1 Part 15.19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

B.1.2 Part 15.105 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

B.1.3 Part 15.21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

B.2 IC Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

B.2.1 Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

B.2.2 Déclaration de conformité. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Appendix C CISPR32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

C.1 Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

DocID029078 Rev 2 3/48

4

Contents UM2032

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

4/48 DocID029078 Rev 2

UM2032 List of tables

List of tables

Table 1. Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Table 2. Power-supply-related jumper settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Table 3. Boot options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Table 4. Boot-related solder bridge and resistor settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Table 5. Arduino Uno V3 compatible connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Table 6. Pin assignment for the extension connector P1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Table 7. Pin assignment for the extension connector P2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 8. Pin assignment for connector CN15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 9. Pin assignment for connector CN7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Table 10. Port assignment to the LED indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 11. I

Table 12. USB OTG FS Micro-AB connector CN3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Table 13. microSD connector CN13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Table 14. USB Micro-B connector CN6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Table 15. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

2

C extension connector pinout CN10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

DocID029078 Rev 2 5/48

5

List of figures UM2032

List of figures

Figure 1. 32F412GDISCOVERY (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 2. 32F412GDISCOVERY (bottom view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 3. Hardware block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 4. 32F412GDISCOVERY top layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 5. 32F412GDISCOVERY bottom layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 6. 32F412GDISCOVERY mechanical drawing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 7. USB composite device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 8. R90 and R92 resistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 9. I

Figure 10. USB OTG FS Micro-AB connector CN3 (front view). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 11. microSD connector CN13 (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Figure 12. USB Micro-B connector CN6 (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Figure 13. 32F412GDISCOVERY discovery kit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Figure 14. 32F412GDISCOVERY MCU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Figure 15. 32F412GDISCOVERY Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Figure 16. 32F412GDISCOVERY LCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Figure 17. 32F412GDISCOVERY Quad-SPI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Figure 18. 32F412GDISCOVERY Audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Figure 19. 32F412GDISCOVERY Peripherals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Figure 20. 32F412GDISCOVERY USB OTG FS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 21. 32F412GDISCOVERY extension connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Figure 22. 32F412GDISCOVERY Arduino Uno V3 connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Figure 23. 32F412GDISCOVERY ST-LINK/V2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

2

C extension connector CN10 (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6/48 DocID029078 Rev 2

UM2032 Features

1 Features

• STM32F412ZGT6 microcontroller featuring 1 Mbyte of Flash memory
and 256 Kbytes of RAM in LQFP144 package

• On-board ST-LINK/V2-1 SWD debugger,
supporting USB re-enumeration capability:

– Virtual COM port
– Mass storage
– Debug port

• 1.54-inch, 240x240-pixel TFT color LCD with parallel interface

2

• I

S audio codec, with a stereo headset jack,

including analog microphone input and a loudspeaker output

• Stereo digital ST-MEMS microphones.

• microSD

2

• I

C extension connector

• 128-Mbit Quad-SPI NOR Flash memory

• Reset button and joystick

• Four-color user LEDs

• USB OTG FS with Micro-AB connector

• Four options for power-supply source:

– ST-LINK/V2-1 USB connector
– User USB FS connector
– VIN from Arduino
– +5 V from Arduino

• Two supply voltage options for STM32: 2.0 V and 3.3 V

• Compatible Arduino

• Extension connectors for direct access to various features of

the STM32F412ZGT6

• Comprehensive free software including a variety of examples,
part of the STM32Cube package

™

card connector

™

™

Uno V3 connector

™

Uno V3 connector

Uno V3 connectors

2 Demonstration software

Demonstration software is preloaded in the STM32F412ZGT6 Flash memory. The latest
version of the demonstration source code and the associated documentation can be
downloaded from the www.st.com/stm32f4-discovery webpage.

DocID029078 Rev 2 7/48

47

Product marking UM2032

3 Product marking

Evaluation tools marked as "ES" or "E" are not yet qualified and therefore they are not ready
to be used as reference design or in production. Any consequences deriving from such
usage will not be at ST charge. In no event, ST will be liable for any customer usage of
these engineering sample tools as reference design or in production.

"E" or "ES" marking examples of location:

• On the targeted STM32 that is soldered on the board (for illustration of STM32 marking,
refer to the section "Package information" of the STM32 datasheet available at

www.st.com).

• Next to the evaluation tool ordering part number, that is stuck or silk-screen printed on
the board.

4 Ordering information

To order the 32F412GDISCOVERY discovery kit refer to Ta bl e 1:

Table 1. Ordering information

Order code Target STM32

STM32F412G-DISCO STM32F412ZGT6

5 Technology partner

MICRON:

• 128-Mbit Quad-SPI NOR Flash memory device, part number N25Q128A

8/48 DocID029078 Rev 2

UM2032 Hardware layout and configuration

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6 Hardware layout and configuration

The 32F412GDISCOVERY discovery kit is designed around the STM32F412ZGT6 (144-pin
TQFP package). The hardware block diagram showed in Figure 3, illustrates the
STM32F412ZGT6 connections with the peripherals. Figure 4 and Figure 5 show the
location of the main components on the discovery kit.

Figure 3. Hardware block diagram

DocID029078 Rev 2 9/48

47

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Figure 4. 32F412GDISCOVERY top layout

Figure 5. 32F412GDISCOVERY bottom layout

10/48 DocID029078 Rev 2

06Y9

UM2032 Hardware layout and configuration

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1

2

5

6

10

7

25

36

25

2

1

1

109

108

73

6

2

1

72

144

37

1 8

8 1

8

5

36

4

5

31

D

A

50

49

50

49

29

28

22

2

23

44

2261

50.8

172

5.08

22.86

65.68

59.35

4.06

23.79

67

48.26

6.1 32F412GDISCOVERY discovery kit mechanical drawing

Figure 6. 32F412GDISCOVERY mechanical drawing

6.2 Embedded ST-LINK/V2-1

ST-LINK/V2-1 programming and debugging tool is integrated into the
32F412GDISCOVERY discovery kit. Compared to ST-LINK/V2 stand-alone tool available
from STMicroelectronics, ST-LINK/V2-1 offers new features and drops some others.

New features:

• USB software re-enumeration

• Virtual COM port interface on USB

• Mass storage interface on USB

• USB power management request for more than 100 mA power on USB

Feature dropped:

• SWIM interface

For all general information concerning debugging and programming features common
between V2 and V2-1 versions, refer to ST-LINK/V2 in-circuit debugger/programmer for
STM8 and STM32 User manual (UM1075) at the www.st.com website.

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6.2.1 Drivers

Before connecting STM32F412ZGT6 to a Windows® XP, 7 or 8 PC via USB, a driver for
ST-LINK/V2-1 must be installed. It can be downloaded from the www.st.com website.

In case the 32F412GDISCOVERY discovery kit is connected to the PC before the driver is
installed, some 32F412GDISCOVERY interfaces may be declared as "unknown" in the PC
device manager. To recover from this situation the user must install the driver files, and
update the driver of the connected device from the device manager (see Figure 7).

Note: Prefer using the "USB Composite Device" handle for a full recovery.

Figure 7. USB composite device

6.2.2 ST-LINK/V2-1 firmware upgrade

ST-LINK/V2-1 employs a dedicated MCU with Flash memory. Its firmware determines
ST-LINK/V2-1 functionality and performance. The firmware may evolve during the life span
of the 32F412GDISCOVERY to include new functionalities, fix bugs or support new target
microcontroller families. It is therefore recommended to keep the
ST-LINK/V2-1 firmware up to date. The latest version is available from the www.st.com
website.

6.3 Power supply

6.3.1 Power supply sources

The 32F412GDISCOVERY discovery kit is designed to be powered by the following
sources:

• 5 V DC from the ST-LINK/V2-1 USB connector CN6 with 500 mA current limitation.
Power mechanism of supplying the discovery kit by the ST-LINK/V2-1 is explained in

Section 6.3.4: Supplying the 32F412GDISCOVERY through the ST-LINK/V2-1 USB
port. A jumper should be placed in location STLK of JP3, connecting pins 3 and 4. The

green LED LD6 is lighted on to confirm the presence of +5 V voltage.

• 5 V DC from the user USB FS connector CN3. A jumper should be placed in location
USB of JP3, connecting pins 5 and 6. The green LED LD6 is lighted on to confirm the
presence of +5 V voltage.

• 6 V to 9 V DC from VIN pin of Arduino Uno V3 compatible connector CN2. The voltage
is limited to 9 V to keep the temperature of the regulator U3 within his thermal safe

12/48 DocID029078 Rev 2

UM2032 Hardware layout and configuration

VOUT VREF 1 R92()R90()÷+()×=

area. A jumper should be placed in location E5V of jumper JP3, connecting pin 1 to pin
2 of JP3. The green LED LD6 is lighted on to confirm the presence of +5 V voltage.

• 5 V DC from +5 V pin of Arduino Uno V3 connector (CN2 pin 5) with limitations. The
jumpers on JP3 and CN5 have to be removed, SB21 (NRST) and SB28 (SWO) have to
be opened. In such configuration the ST-LINK/V2-1 MCU is not powered, as
consequence the 8 MHz of the ST-LINK/V2-1 cannot be used as external input clock
for the STM32.

For details on JP3 jumper setting refer to Table 2: Power-supply-related jumper settings.

6.3.2 STM32 power supply options

The 32F412GDISCOVERY offers the possibility to supply the STM32 under 2.0 V or 3.3 V.
A jumper has to be placed in location 2.0 V of JP5 to supply the STM32 under 2.0 V, then
pins 2 and 3 are connected. Similarly the jumper has to be placed in 3.3 V to supply the
STM32 with 3.3 V, then pins 1 and 2 of JP5 are connected.

For details on JP5 jumper setting refer to Table 2: Power-supply-related jumper settings.

6.3.3 Modification of STM32 voltage

Regulator U16 LD1117STR is dedicated to the 2.0 V supply. The output voltage of U16 is by
default 2.0 V but it is adjustable depending on the resistors R90 and R92 which are by
default 120 and 68 ohms respectively. The output voltage is calculated as following:

with VREF = 1.25 V.

If necessary, resistors R90 and R92 can be changed to modify the STM32 supply voltage.
R90 and R92 are easily located bottom side of the discovery kit near U16 (see Figure 5 and

Figure 8).

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Hardware layout and configuration UM2032

Figure 8. R90 and R92 resistors

6.3.4 Supplying the 32F412GDISCOVERY through the ST-LINK/V2-1 USB port

To power the 32F412GDISCOVERY through the ST-LINK/V2-1, the USB host (a PC) gets
connected with the 32F412GDISCOVERY Micro-B USB receptacle CN6, via a USB cable.
This event starts the USB enumeration procedure. In its initial phase, the current supply
capability of the USB port located on the host, is limited to 100 mA. It is enough because
only the ST-LINK/V2-1 part of the 32F412GDISCOVERY discovery kit draws power at that
time. If the solder bridge SB18 is open (default configuration), the U8 ST890 power switch is
set to OFF position, and only the ST-LINK/V2-1 is powered. In the next phase of the
enumeration procedure, the host PC informs the ST-LINK/V2-1 facility of its capability to
supply up to 500 mA of current. If the answer is positive, the ST-LINK/V2-1 sets the U8
ST890 switch to ON position to supply power to the remainder of the 32F412GDISCOVERY
discovery kit. If the PC USB port is not capable of supplying up to 500 mA of current,
another power source should be used like VIN pin of connector CN2.

Should a short-circuit occur on the discovery kit, the ST890 power switch protects the USB
port of the host against current demand exceeding 600 mA. In such an event, the red LED
FAULT LD10 lights on.

The 32F412GDISCOVERY discovery kit can also be supplied from a USB power source not
supporting enumeration, such as a USB charger. In this particular case, SB18 solder bridge
must be closed. ST-LINK/V2-1 turns the ST890 power switch ON regardless of the
enumeration procedure result and passes the power unconditionally to the discovery kit.

The green LED LD6 turns on whenever the discovery kit is powered.

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UM2032 Hardware layout and configuration

USB

STLK

E5V

1

USB

STLK

E5V

1

6.3.5 Programming/debugging when the power supply is not from ST-LINK/V2-1

Before connecting the USB cable from the ST-LINK/V2-1 USB connector CN6 to the PC, it
is mandatory to power the discovery kit using the user USB FS connector CN3 or the VIN
pin of the Arduino Uno V3 connector CN2. Proceeding this way, ensures that the
enumeration succeeds thanks to the external power source.

The following power sequence procedure must be respected:

1. Put a jumper in JP3 at location USB to use power from the user USB CN3 or at location

E5V to use power from VIN of Arduino Uno V3 connector CN2.

2. Connect the corresponding external power source.

3. Check that the green LED LD6 is turned ON

4. Connect the PC to the ST-LINK/V2-1 USB connector CN6

If this order is not respected, the discovery kit may be powered by VBUS first from ST­LINK/V2-1, and the following risks may be encountered:

1. If more than 500 mA current is needed by the discovery kit, the PC may be damaged or

current can be limited by PC. As a consequence the discovery kit is not powered
correctly.

2. 500 mA is requested at the enumeration. If the PC cannot provide such current there is

a risk that the request is rejected and the enumeration does not succeed.

6.3.6 Measurement of current IDD drawn by the microcontroller

The jumper JP7 should be closed by default to supply the STM32F412ZGT6. To measure
the current IDD drawn by the microcontroller STM32F412ZGT6 only, remove the jumper
JP7 and replace it by a multimeter (see Tabl e 2).

Jumper Description

JP3

Table 2. Power-supply-related jumper settings

Default Setting

32F412GDISCOVERY is supplied through the Micro-B ST-LINK/V2-1 connector
CN6. Jumper in STLK place.

32F412GDISCOVERY is supplied through CN3 Micro-AB USB FS connector.
Jumper in USB place.

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Hardware layout and configuration UM2032

USB

STLK

E5V

1

USB

STLK

E5V

1

+3V3

1

+2V

+2V +3V3

1

VDD +3V3

1

Table 2. Power-supply-related jumper settings (continued)

Jumper Description

32F412GDISCOVERY is supplied through the VIN pin of the Arduino Uno V3
compatible connector CN2. Jumper in E5V place.

JP3

JP5

32F412GDISCOVERY is supplied by +5 V pin of Arduino

Uno V3 compatible

connector CN2 (pin 5) or by pins 3 or 4 of the extension connector P2. No jumper in
JP3.

Default Setting

STM32F412ZGT6 is supplied with a +3.3 V voltage (VDD_MCU).

STM32F412ZGT6 STM32 is supplied with a +2.0 V voltage (VDD_MCU).

Default Setting

VDD_USB power pin of STM32F412ZGT6 is supplied with same voltage VDD_MCU
as remainder supply pins of STM32.

JP6

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UM2032 Hardware layout and configuration

VDD +3V3

1

IDD

Table 2. Power-supply-related jumper settings (continued)

Jumper Description

VDD_USB power pin of STM32F412ZGT6 is supplied with a fix voltage of +3V3
independently of the remainder of supply pins of STM32.

JP6

Default Setting

JP7 IDD is closed by default to supply the STM32F412ZGT6 and when removed, it
offers the possibility to insert an ammeter to measure the current drawn by the
STM32 only.

JP7

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Hardware layout and configuration UM2032

6.4 Clock source

6.4.1 HSE clock source

By default the 8 MHz clock source is provided to the STM32F412ZGT6 by the MCO output
of the ST-LINK/V2-1 MCU U6. In that case the solder bridge SB20 is closed, resistors R45
and R46 are not soldered, solder bridge SB22 is open. The pins PH0 and PH1 are not
available for the extension connector P2.

Alternatively, the discovery kit offers the possibility to use a crystal to provide the 8 MHz
HSE clock source of the STM32F412ZGT6 U7. In that case, PH0 and PH1 are used as
OSC_IN and OSC_OUT respectively. The solder bridges SB20, SB22, SB16 must be
opened, 0 ohm resistors should be soldered to R45 and R46 and a crystal must be soldered
in place X2. Regarding component selection of X2, capacitors C19 and C21 (8.2 pF) are
optimized for a crystal NDK NX3225GD 8 MHz EXS00A-CG04874 and they are not fitted.
The pins PH0 and PH1 are not available for the extension connector P2.

6.4.2 LSE clock source

By default, the 32.768 kHz crystal X3 is connected to pins PC14-OSC32_IN and PC15­OSC32_OUT of STM32F412ZGT6 for the RTC clock. Solder bridges SB25 and SB23 must
be open.

If LSE clock is not used, it is possible to use PC14-OSC32_IN and PC15-OSC32_OUT of
STM32F412ZGT6 and to access by the extension connector P2. In that case, solder
bridges SB25 and SB23 must be closed and resistors R54, R56 removed.

6.5 Reserved use of solder bridges

The following solder bridges must not be changed otherwise the microcontroller
STM32F412ZGT6 U7 or other parts of the discovery kit may be damaged:

• Solder bridges must be left closed: SB34, SB26

• Solder bridges must be left open: SB27, SB35

6.6 Reset source

The reset signal of 32F412GDISCOVERY discovery kit is low active and the reset sources
include:

• Reset button B1, providing solder bridge SB1 is closed (default setting)

• Embedded ST-LINK/V2-1, providing solder bridge SB21 is closed (default setting)

• Arduino Uno V3 compatible connector CN2 pin 3

• Extension connector P1 pin 6

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UM2032 Hardware layout and configuration

6.7 Boot options

After reset, the STM32F412ZGT6 boots from the following embedded memory locations
depending on bits BOOT0 and BOOT1 (see Tab le 3 ):

• User Flash memory (non-protected)

• System Flash memory (protected) for In Circuit Programming

• RAM for debugging

BOOT0 BOOT1 Boot Memory

0 X User Flash

1 0 System Flash

11 RAM

BOOT0 is set by the input pin BOOT0 of the STM32F412ZGT6. Its level is set by default to
0 by closing the solder bridge SB31 and keeping R69 unfitted. BOOT1 is shared with the
GPIO PB2 used as QSPI_CLK and is sampled by the STM32F412ZGT6 only at RESET
phase. At start-up, BOOT1 level depends on the resistors R104 and R100. By default R100
and R104 are not fitted on the discovery kit to avoid any influence on the QSPI_CLK signal
using same pin as BOOT1.

Table 3. Boot options

The application note “STM32 microcontroller system memory boot mode” Application note
(AN2606) details the bootloader mechanism and configurations.

Boot-related solder bridge and resistor settings are reported in Table 4:

Resistors, solder bridge Description

SB31 Closed

R69 not fitted

BOOT0=0

SB31 Open

R69 fitted

(any value

from 0 to 10K)

BOOT0=1

1. To keep Quad-SPI functionality after boot-up phase, the user should select a resistor value of R100 or

R104 insuring a weak pull-down or weak pull-up respectively.

Table 4. Boot-related solder bridge and resistor settings

R100 and

R104 not fitted

BOOT1=X

R100 not fitted

R104 fitted

BOOT1=0

R100 fitted

R104 not fitted

BOOT1=1

Default Setting

Microcontroller STM32F412ZGT6 boots from user Flash.

Microcontroller STM32F412ZGT6 boots from system Flash.

(1)

R104 is a pull-down resistor on PB2 shared between BOOT1 and
QSPI_CLK.

(1)

Microcontroller STM32F412ZGT6 from RAM.
R100 is a pull-up resistor on PB2 shared between BOOT1 and

QSPI_CLK.

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Hardware layout and configuration UM2032

6.8 Audio codec

A Cirrus/Wolfson codec WM8994 U15 connected to the I2S3 interface of the microcontroller
STM32F412ZGT6 offers possibility to connect a stereo headphone or headset with a mono­analog microphone. A loudspeaker can be connected to the extension connector.

The digital audio output from the microcontroller is handled by the port of the microcontroller
PB5 called CODEC_I2S3_SD while the other direction is handled by port PB4 called
CODEC_I2S3ext_SD.

²

The I

C-bus address of WM8994 is 0b0011010.

6.8.1 Stereo headset and headphone jack

A stereo headphone or a stereo headset with analog microphone can be plugged into the

3.5 mm standard jack socket CN9.

The stereo digital audio streamed from pin PB5 of the microcontroller STM32F412ZGT6 is
transformed in a stereo analog output by the codec WM8994 and is delivered to the
headphone or headset through the pins 6 and 4 of the jack socket CN9.

If a headset is plugged into CN9, the bias of the microphone is driven by the output
MICBIAS1 of the codec and the analog audio enters into the codec by the pin IN1LN.

The corresponding digital audio output from the codec is connected to the microcontroller
STM32F412ZGT6 by the port PB4.

6.8.2 Loudspeaker output

The 32F412GDISCOVERY discovery kit can deliver a monophonic audio to a loudspeaker
connected to pins 36 and 38 of the extension connector P2. It is recommended to use the
WM8994 codec loudspeaker outputs SPKOUTRN and SPKOUTRP in linear mode called
"class AB". This mode is compatible with 4-ohm to 8-ohm impedance loudspeakers. Use of
the switching mode called "class D" requires to use an appropriate filter to maximize
rejection of unwanted frequencies and efficiency. To select the mode "class AB" of the codec
WM8994, set to 1 the bit 8 of the register 0x23.

6.9 Digital microphones

Two ST-MEMS MP34DT01TR digital microphones U4 and U5 are available on the
32F412GDISCOVERY discovery kit. The two microphones are located at a distance of
21 mm each other. The microphones are connected to the DFSDM of the STM32 by the port
PC2 generating the clock and by the port PB1 collecting the PDM interleaved data.

6.10 USB OTG FS

A USB OTG full-speed communication is available at USB Micro-AB receptacle connector
CN3.

Limitations: the USB-related operating supply voltage of STM32L412ZGT6 (VDD_USB
line) must be within the range from 3.0 V to 3.6 V. Therefore, in case the STM32F412ZGT6
is supplied with 2 V by JP5 set in +2 V position, the USB of the STM32 works only if the
VDD_USB power pin is supplied independently by +3.3V. This is done by closing pins 2 and
3 of the jumper JP6 (refer to Table 2: Power-supply-related jumper settings).

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UM2032 Hardware layout and configuration

6.10.1 32F412GDISCOVERY is USB device

When the 32F412GDISCOVERY is USB device, the discovery kit is powered by the 5 V of
the CN3 USB OTG FS Micro-AB connector. In this case a jumper must be put in USB
location of jumper JP3 and the green LEDs LD7 VBUS and LD6 PWR light on to confirm the
5 V presence.

6.10.2 32F412GDISCOVERY is USB host

When the 32F412GDISCOVERY is USB host it supplies the 5V for the USB peripheral
using one of the following sources:

• ST-LINK/V2-1 USB Micro-B connector CN6, putting a jumper in STLK location of JP3

• An external +5 V source connected to pins 3 or 4 of the extension connector P2, with

no jumper in JP3.

• An external +5V source connected to 5 V pin of Arduino Uno V3 connector CN2, with

no jumper in JP3.

• An external source between +7 to +11 V connected to VIN pin of Arduino Uno V3

connector CN2, putting a jumper in E5V location of JP3.

The green LED LD6 is lighted to confirm the presence of the +5 V source.

The power switch STMPS2141STR is controlled by the port PG8 of STM32 to deliver the
5 V power to the USB device connected to the USB connector CN3. It is recommended to
use PG8 in open drain mode. When PG8 is closed to ground, the power switch is closed,
and the green LED LD7 confirms the 5 V to the USB Device.

The red LED LD8 FAULT is lit when an overcurrent occurs.

For more details refer to Section 6.3: Power supply.

6.11 microSD card

microSD cards with a capacity of 4 Gbytes or more can be inserted in the receptacle CN13.
The four bits of the SDIO interface including CLK and CMD signals of the STM32F412ZGT6
are used to communicate with the microSD card. The card detection is read by the GPIO
PD3: when a microSD card is inserted, the logic level is 0, otherwise it is 1.

Note that port PC9 used as uSD_D1 can be routed also to the pin 46 of the extension
connector P2, by closing the solder bridge SB43 for other usage like the alternate function
MCO2. Therefore the use of the microSD card is exclusive with MCO2 output.

Limitations: The microSD card is not working when the STM32 is supplied with 2V.

6.12 I2C extension connector

The I2C2 bus is available on the I2C extension connector CN10. I2C2-SDA (port PB9) is
available on pin 1 and I2C2-SCL is available on pin 3. Pins 5 and 7 of CN10 are the VDD
and GND supplying the microcontroller. I2C2 voltage levels follows also VDD.

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Hardware layout and configuration UM2032

6.13 Quad-SPI NOR Flash memory

A 128-Mbit Quad-SPI NOR Flash memory (N25Q128A13EF840E from MICRON) is
connected to the Quad-SPI interface of the STM32F412ZGT6 microcontroller.

Note that QSPI_CLK (port PB2) is sampled by the STM32F412ZGT6 at start-up as the
BOOT1 bit. If necessary, the user can set the BOOT1 state by fitting one of the resistors
R100 or R104. By default R100 and R104 are not fitted. Refer to Section 6.7: Boot options
for more details.

Limitations: The Quad-SPI memory is not working when the STM32 is supplied with 2 V.

6.14 Virtual COM port

The serial interface USART2 is directly available through a USB virtual COM port of the
ST-LINK/V2-1. The USB connector is CN6.

6.15 Arduino Uno V3 connectors

CN1, CN2, CN11 and CN12 are female connectors compatible with Arduino Uno V3
standard. Most shields designed for Arduino Uno V3 can fit to the 32F412GDISCOVERY
discovery kit.

Caution: The IOs of STM32 microcontroller are 3.3 V compatible instead of 5 V for Arduino Uno V3.

Left connectors Right connectors

CN No.

- - - - - I2C2_SCL PB10 D15 10

--- - - AVDD-AVDD8

- - - - - Ground - GND 7

CN2

Power

Pin

Pin name STM32 pin Function Function

No.

1- -

2 IOREF - 3.3 V SPI1_MISO PA6 D12 5

3 NRST NRST Reset

Table 5. Arduino Uno V3 compatible connectors

STM32

pin

-I2C2_SDAPB9D149

Not

connected

SPI1_SCK PA5 D13 6

TIM3_CH2,

SPI1_MOSI

PA7 D11 4

Pin

name

Pin No. CN No.

CN12

Digital

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UM2032 Hardware layout and configuration

Table 5. Arduino Uno V3 compatible connectors (continued)

Left connectors Right connectors

CN No.

CN2

Power

--- - -TIM5_CH1PF3D67

CN1

Analog

Pin

Pin name STM32 pin Function Function

No.

+3.3 V

4+3V3 -

5+5 V -

6 GND - Ground - PG10 D8 1

7 GND - Ground - - - -

8VIN -

1 A0 PA1 ADC1_IN1 TIM5_CH4 PF10 D5 6

2 A1 PC1 ADC1_IN11 - PG12 D4 5

3 A2 PC3 ADC1_IN13 TIM5_CH2 PF4 D3 4

4 A3 PC4 ADC1_IN14 - PG13 D2 3

5A4

6A5

PC5 or PB9

(see Note:3)

PB0 or PB10

(see Note:3)

input/output

(see Note:1)

+5 V

input/output

(see Note:4)

+6V to +9V

power input

(see Note:2)

ADC1_IN15

or

I2C2_SDA

(see Note:3)

ADC1_IN8

or

I2C2_SCL

(see Note:3)

TIM2_CH1,

SPI1_NSS

TIM4_CH3 PB8 D9 2

-PG11D78

USART6_TX PG14 D1 2

USART6_RX PG9 D0 1

STM32

pin

PA15 D 10 3

Pin

name

Pin No. CN No.

CN12

Digital

CN11

Digital

Note:1 Important, before using pin 4 of CN2 as +3.3V input, insure that the solder bridge SB4 is

removed. Otherwise the 32F412GDISCOVERY discovery kit could be damaged by the
overcurrent.

Note:2 The external voltage applied to pin VIN should be in the range 6 to 9V at 25°C ambient

temperature. If a higher voltage is applied, the regulator U3 may overheat and could be
damaged.

Note:3 By default pin 5 and pin 6 of connector CN1 are connected respectively to the port PC5

(ADC1_IN15) and BP0 (ADC1_IN8) of the STM32. They are enabled by the default
configuration of the solder bridges: SB8 and SB6 closed, SB7 and SB5 opened. In case it is
necessary to have an I2C interface instead of ADC inputs on pins 5 and 6 of CN1, open SB8
and SB6, and close SB7 and SB5.

Note:4 Important, before using pin 4 of CN2 as +5 V input, insure the jumpers and solder bridges

are configured according to 5

V DC power input defined in Section 6.3.1: Power supply

sources. Otherwise the 32F412GDISCOVERY discovery kit could be damaged by the

overcurrent.

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Hardware layout and configuration UM2032

6.16 Extension connectors P1 and P2

The extension connectors consist in male pin headers P1 and P2 (not soldered by default).
They provide access to the following IPs of the STM32F412ZGT6:

• SPI

2

• I

C with SMBA and FM+ (1 MHz speed)

• Full USART (Rx, Tx, RTS, CTS)

• CAN

• ADC inputs

• TIMERs channels

2

• I

S full duplex with SD and extSD alternate functions.

• DFSDM input for stereo PDM digital microphones

Most of the ports connected to the extension connectors P1 and P2 are the same for the
32F401CDISCOVERY and 32F411EDISCOVERY discovery kits, to maximize the
compatibility with the previous designs. In Tab l e 6, Tab le 7 and in the 32F412GDISCOVERY
schematics (see Section Appendix A: Schematics), the pin numbers corresponding to these
ports, are annotated with the star symbol: “*”.

In Table 6, Table 7 and in the 32F412GDISCOVERY schematics (see Section Appendix A:

Schematics) the pins belonging to the extension connectors P1 and P2 annotated with a

letter, are shared with a peripheral of the 32F412GDISCOVERY (for example, S means that
the port PC9 corresponding to pin 46 is also used for microSD, see Table 7).

Table 6. Pin assignment for the extension connector P1

P1 odd pins P1 even pins

Pin No. Name Note Pin No. Name Note

1GND* 2GND*

3 VDD_MCU * 4 VDD_MCU *

5 GND * 6 NRST *

7 PC1 *A 8 PC0 *

9PC3*A10PC2*D

11 PA1 * A 12 - -

13 PA3 *V 14 PA2 *V

15 PA5 *A 16 PA4 *C

17 PA7 *A 18 PA6 *A

19 PC5 *A 20 PC4 *A

21 PB1 *D 22 PB0 *A

23 GND * 24 PF2 -

25 PF3 A 26 - -

27 PF10 A 28 PF11 -

29 - - 30 PF13 -

31 PG2 C 32 - -

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UM2032 Hardware layout and configuration

Table 6. Pin assignment for the extension connector P1 (continued)

P1 odd pins P1 even pins

Pin No. Name Note Pin No. Name Note

33 PG9 A 34 PB10 *A

35 PB11 *D 36PB12*C

37 PB13 * 38 PB14 *

39 PB15 * 40 - -

41 - - 42 - -

43 - - 44 PD12 *

45 PD13 * 46 - -

47 - - 48 - -

49 GND * 50 GND *

Table 7. Pin assignment for the extension connector P2

P2 odd pins P2 even pins

Pin No. Name Note Pin No. Name Note

1GND* 2GND*

3+5V* 4+5V*

5+3V3* 6+3V3*

7PH0* 8PH1*

9 PC14 * 10 PC15 *

11 PE6 * 12 PC13 *

13 PE4 * 14 PE5 *

15 PE2 * 16 PE3 *

17 PE0 * 18 PE1 *

19 PB8 *A 20 PB9 *A

21 BOOT0 * 22 VDD_MCU *

23 PB6 *TC 24 PB7 *TC

25 PB4 *C 26 PB5 *C

27 - - 28 PB3 *

29 - - 30 PD6 *

31 PG10 A 32 PG11 A

33 PG12 A 34 PG13 A

35 PG14 A 36 SPKOUTRN -

37 - - 38 SPKOUTRP -

39 PA14 * 40 PA15 *A

DocID029078 Rev 2 25/48

47

Hardware layout and configuration UM2032

Table 7. Pin assignment for the extension connector P2 (continued)

P2 odd pins P2 even pins

Pin No. Name Note Pin No. Name Note

41 PA10 * 42 PA13 *

43 PA8 *D 44 - -

45 - - 46 PC9 *S

47 PC6 * 48 PC7 *C

49 GND * 50 GND *

Note:1 The star symbol “*” means pin compatible with 32F401CDISCOVERY and

32F411EDISCOVERY discovery kits.

Note:2 Meaning of the letters: “A”: shared with Arduino Uno V3 connectors, C: shared with codec,

D: shared with digital microphones, V: shared with virtual COM port, T: shared with
capacitive touch panel, S: shared with microSD.

6.17 LCD display, backlight and touch panel

6.17.1 LCD display

The display is a 1.54-inch, 240x240 pixels TFT color LCD with capacitive touch panel. It
displays up to 262 K colors. The LCD parallel interface is connected to the FMC of the
STM32F412ZGT6 by the connector CN15 (see Tab le 8 ).

To enable the data bus of the LCD display in 16-bit mode, the solder bridges SB41 and
SB42 are opened and closed respectively by default. In this way the IM signal of the LCD is
set to high.To use the LCD in 8-bit mode, SB41 must be closed and SB42 opened.

The selection of the LCD is performed by FMC_NE1 (PD7), write-enable signal is
FMC_NWE (PD5) and read-enable is FMC_NOE (PD4). The address bit A0 of the FMC
(Flexible Static Memory Controller) is used to select data/command access to the LCD.

The port PG4 should be used as an input of the microcontroller connected to the LCD signal
TE (Tearing Effect). To avoid visible artifacts on the display, TE signal is used to synchronize
the refresh of the LCD memory done by the microcontroller with the LCD scan.

The port PD11 of the STM32F412ZGT6 controls the reset of the LCD display LCD_RESET.

CN15 pin

1 GND Ground GND

2 LCD_TE Tearing Effect output pin to send an interrupt to STM32 PG4

3 D15 Data connected to FMC PD10

4 D14 Data connected to FMC PD9

Signal

name

Table 8. Pin assignment for connector CN15

Description

STM32 pin

involved

5 D13 Data connected to FMC PD8

26/48 DocID029078 Rev 2

UM2032 Hardware layout and configuration

Table 8. Pin assignment for connector CN15 (continued)

CN15 pin

Signal

name

Description

6 D12 Data connected to FMC PE15

7 D11 Data connected to FMC PE14

8 D10 Data connected to FMC PE13

9 D9 Data connected to FMC PE12

10 D8 Data connected to FMC PE11

11 D7 Data connected to FMC PE10

12 D6 Data connected to FMC PE9

13 D5 Data connected to FMC PE8

14 D4 Data connected to FMC PE7

15 D3 Data connected to FMC PD1

16 D2 Data connected to FMC PD0

17 D1 Data connected to FMC PD15

18 D0 Data connected to FMC PD14

19 /RD Read of LCD connected to FMC_NOE PD4

20 /WR Write of LCD connected to FMC_NWE PD5

21 RS Data/Command select connected to A0 PF0

22 /CS Chip Select of LCD connected to FMC_NE1 PD7

STM32 pin

involved

23 RESET LCD RESET PD11

24 IM 8-bit (low)/16-bit (high) mode selection pin n/a

25 IOVCC LCD I/Os power supply connected to VDD n/a

26 VCI Power supply connected to +3.3V n/a

27 GND Ground GND

28 LEDA Anode of backlight LED n/a

29 LEDK Cathode of backlight LED n/a

6.17.2 LCD signal access (CN7)

CN7 is the footprint of a dual-row, through-hole, 26-pin header with 2.54 mm pitch. The
header CN7 gives an easy access to the FMC signals of the LCD (see Table 9).

CN7 odd pins Signal name CN7 even pins Signal name

1 A0 2 LCD_BLCTRL

3FMC_NWE 4 GND

5 FMC_NE1 6 FMC_NOE

7D08 D1

Table 9. Pin assignment for connector CN7

DocID029078 Rev 2 27/48

47

Hardware layout and configuration UM2032

Table 9. Pin assignment for connector CN7 (continued)

CN7 odd pins Signal name CN7 even pins Signal name

9 D2 10 +3.3V

11 D3 12 VD D

13 LCD_TE 14 LCD_RESET

15 D4 16 D5

17 D6 18 D7

19 D8 20 D9

21 D10 22 D11

23 D12 24 D13

25 D14 26 D15

6.17.3 Backlight

LEDK and LEDA signals of the LCD module are the cathode and the anode respectively of
the backlight LEDs.

The backlight requires a current source of typically 15 mA capable to deliver a voltage up to
10 V. This function is handled by the backlight-driver circuit STLD40DPUR that is a
switching-mode-boost converter, supplied by the +5 V rail of the discovery kit.

The high level on the signal LCD_BLCTRL (PF5) lights the backlight on. It is possible to dim
the backlight intensity by applying a low-frequency PWM signal to LCD_BLCTRL (1 to
10 kHz).

6.17.4 Touch panel

The touch panel is a capacitive touch panel using an I2C interface. The 10-pin connector
CN14 of the touch panel is located at the bottom side of the discovery kit (see Figure 5:

32F412GDISCOVERY bottom layout). The I

SCL line is connected to PB6. An interrupt output CTP_INT is connected to port PG5 to be
used as an interruption input of the microcontroller. Port PF12 is the reset of the capacitive
touch panel.

6.18 Joystick and LEDs

The blue button B2 is a 4-direction joystick with a selection mode when pressed in the
center. The logic state is high when one of the five-position switches (Left, Right, Up, Down,
Selection) is pressed. The center position is connected to a wake-up pin of the
microcontroller PA0. This offers the possibility to wake-up the microcontroller by pressing
the center of the joystick.

Four LEDs located near the Arduino Uno V3 connectors CN1 and CN2 are available for the
user (refer to the Figure 4: 32F412GDISCOVERY top layout). From left to right the user
finds LD1, LD2, LD3 and LD4 with their colors green, orange, red and blue respectively. To
light a LED a low-logic state 0 must be written in the corresponding GPIO.

2

C SDA line is connected to PB7 and the I2C

Table 10 gives the assignment of control ports to the LED indicators.

28/48 DocID029078 Rev 2

UM2032 Hardware layout and configuration

Table 10. Port assignment to the LED indicators

LED Controlled by STM32 port Color

LD1 PE0 Green

LD2 PE1 Orange

LD3 PE2 Red

LD4 PE3 Blue

DocID029078 Rev 2 29/48

47

Connectors UM2032

069





7 Connectors

7.1 I2C extension connector CN10

Figure 9. I2C extension connector CN10 (front view)

Pin number Description Pin number Description

1 I2C1_SDA (PB9) 5 VDD

2NC6NC

3 I2C1_SCL (PB10) 7 GND

4 EXT_RESET (PF11) 8 NC

Tab l e 11. I2C extension connector pinout CN10

7.2 USB OTG FS Micro-AB connector CN3

Figure 10. USB OTG FS Micro-AB connector CN3 (front view)

Pin number Description Pin number Description

1 VBUS (PA9) 4 ID (PA10)

2 DM (PA11) 5 GND

3 DP (PA12) - -

Table 12. USB OTG FS Micro-AB connector CN3

30/48 DocID029078 Rev 2

UM2032 Connectors

7.3 microSD connector CN13

Figure 11. microSD connector CN13 (front view)

Pin

number

1 SDIO_D2 (PC10) 6 GND

2 SDIO_D3 (PC11) 7 SDIO_D0 (PC8)

3 SDIO_CMD (PD2) 8 SDIO_D1 (PC9)

4+3.3V9GND

5 SDIO_CLK (PC12) 10 MicroSDcard_detect (PD3)

Table 13. microSD connector CN13

Description

Pin

number

7.4 ST-LINK/V2-1 USB Micro-B connector CN6

Figure 12. USB Micro-B connector CN6 (front view)

Description

DocID029078 Rev 2 31/48

47

Connectors UM2032

Table 14. USB Micro-B connector CN6

Pin number Description Pin number Description

1 VBUS (power) 4 GND

2 DM 5,6 Shield

3DP- -

32/48 DocID029078 Rev 2

UM2032 Schematics

Appendix A Schematics

This section provides the design schematics for the 32F412GDISCOVERY discovery kit, to
help users to implement these features in application designs.

This section includes:

• Overall schematics for the 32F412GDISCOVERY, see Figure 13

• STM32 connections, see Figure 14

• Power supply, see Figure 15

• LCD, camera and connector, see Figure 16

• Quad-SPI, see Figure 17

• Audio amplifier, see Figure 18

• Peripherals, see Figure 19

• USB OTG FS, see Figure 20

• Extension connectors, see Figure 21

• Arduino Uno V3 connector, see Figure 22

• ST-LINK/V2-1, see Figure 23

DocID029078 Rev 2 33/48

47

34/48 DocID029078 Rev 2

111

MB1209-TOP

MB1209 D-02

6/29/2016

Title:

Size: Reference:

Date: Sheet: of

A3

Revision:

STM32F412G-DISCO

Project:

uSD_D0
uSD_D1
uSD_D2
uSD_D3
uSD_CLK
uSD_CMD

D[0..15]

A0

NRST

QSPI_BK1_IO3

FMC_NOE

FMC_NWE

LED3
LED4

QSPI_BK1_IO2

QSPI_BK1_IO0
QSPI_BK1_IO1

uSD_Detect

USB_OTGFS_VBUS
USB_OTGFS_ID

USB_OTGFS_DM

DFSDM_DATIN0

QSPI_CLK

DFSDM_CKOUT

FMC_NE1

LCD_RESET

LED1
LED2

JOY_RIGHT

JOY_LEFT

JOY_UP

JOY_DOWN

QSPI_BK1_NCS

USB_OTGFS_OVRCR

USB_OTGFS_PPWR_EN

SWO

SWDIO
SWCLK

USART2_TX
USART2_RX

EXT_RESET

PH0
PH1

STLK_MCO

JOY_SEL

CODEC_INT

LCD_TE

LCD_BLCTRL

PC0

PC2

PD12

PC1

PC3

PD13

PE6

PE4

PE2

PE0
PE1

PE5

PE3

PD6

PA4

PA6

PA2

PA1

PA7

PA5

PA3

PA14

PA10

PA8

PA13

PA15

PB10

PB12

PB14

PB11

PB13

PB15

PB8

PB6

PB4

PB7

PB5

PB3

PB9

PC4
PC5

PC14

PC6

PC15

PC7

PB1

PB0

PF2
PF3

PF10
PF11

PF13

PG2

PG9
PG10
PG11
PG12
PG13
PG14

I2C2_SDA

I2C2_SCL

USB_OTGFS_DP

PC13

BOOT0

DFSDM_DATIN3

I2C1_SCL

I2C1_SDA

CODEC_I2S3_WS

CODEC_I2S3_SCK

CODEC_I2S3_SD

CODEC_I2S3_MCK

CODEC_I2S3ext_SD

CTP_INT

ARD_D3

CTP_RST

ARD_D5

ARD_D4

ARD_A0

ARD_D2

ARD_D1

ARD_D0

ARD_D8

ARD_D7

ARD_A1
ARD_A2
ARD_A3
ARD_A4

ARD_D12
ARD_D13

ARD_D11

ARD_D10

ARD_A5

ARD_D15

ARD_D14

ARD_D9

ARD_D6

PC9

U_MCU2
MCU2.SchDoc

PC0

PC2

PA4

PA6

PC4

PB0

PB10

PB12

PB14

PD12

PC1

PC3

PA1

PA7

PC5

PB1

PA5

PB11

PB13

PB15

PD13

PH1

PC15

PC13

PE1

PB7

PB5

PB3

PE5

PE3

PB9

PD6

PA13

PA15

PC7

PH0

PC14

PE6

PE4

PE2

PE0

PB8

PB6

PA14

PA10

PA8

PB4

PC6

PA2
PA3

PF2
PF3

PF10
PF11

PF13
PG2

PG9
PG10
PG11
PG12
PG13
PG14

SPKOUTRN

SPKOUTRPBOOT0

NRST

PC9

U_Extension_connectors

Extension_connectors.SchDoc

CODEC_INT

DFSDM_DATIN0

DFSDM_CKOUT

SPKOUTRN
SPKOUTRP

DFSDM_DATIN3

CODEC_I2S3_SCK
CODEC_I2S3_WS
CODEC_I2S3_SD

I2C1_SCL

CODEC_I2S3_MCK

I2C1_SDA

CODEC_I2S3ext_SD

U_Audio
Audio.SchDoc

NRST ARD_A0

ARD_A1
ARD_A2
ARD_A3
ARD_A4
ARD_A5

ARD_D5

ARD_D4

ARD_D3

ARD_D2

ARD_D1

ARD_D0

ARD_D13

ARD_D12

ARD_D11

ARD_D10

ARD_D9

ARD_D8

ARD_D6
ARD_D7

ARD_D15

ARD_D14

U_Arduino_ Connectors
Arduino_ Connectors.SchDoc

LCD_RESET

A0

FMC_NWE

FMC_NOE

FMC_NE1

LCD_TE

LCD_BLCTRL

LCD_D[0..15]

I2C1_SDA
I2C1_SCL

CTP_INT

CTP_RST

U_LCD
LCD.SchDoc

uSD_CLK

uSD_CMD

uSD_D0
uSD_D1
uSD_D2
uSD_D3

uSD_Detect

EXT_RESET

LED1
LED2
LED3
LED4

NRST

I2C2_SDA
I2C2_SCL

JOY_SEL

JOY_DOWN

JOY_LEFT

JOY_RIGHT

JOY_UP

U_Peripherals
Peripherals.SchDoc

QSPI_BK1_IO0

QSPI_BK1_IO2

QSPI_BK1_IO1

QSPI_BK1_IO3

QSPI_CLK

QSPI_BK1_NCS

U_QSPI
QSPI.SchDoc

USB_OTGFS_VBUS

USB_OTGFS_DM

USB_OTGFS_DP

USB_OTGFS_ID

USB_OTGFS_OVRCR

USB_OTGFS_PPWR_EN

U_USB_OTG_FS
USB_OTG_FS.SchDoc

U_Power
Power.SchDoc

STLK_MCO

NRST

SWCLK

SWDIO

SWO
USART2_TX
USART2_RX

U_ST_LINK_V2-1_2
ST_LINK_V2-1_2.SCHDOC

i

FMCMatched Net Lengths [Tolerance = 200mil]

Impedance Constraint [Min = 40.00 Max = 60.00 ]

i

FMC

i

FMC

i

FMC

i

FMC

i

FMC

i

QSPI

Matched Net Lengths [Tolerance = 100mil]

i

QSPI

i

QSPI

i

QSPI

i

QSPI

i

QSPI

N

Figure 13. 32F412GDISCOVERY discovery kit

rev D-01 modifications:

Silkscreen:

- update revision of board to D top side and bottom side.

- name of pin32 of connector P1 is NC

- bottom side update the LCD reference: LCD ref:
FRD154BP2902-CTP

Schematic:

- R69-2 connected to VDD

- updated CTP connector CN14: pin8 is now IOVCC

- added SB44, SB45,

C87 connected to CN14 pin8

- remove ZZ2 because LCD and CTP are now same part

- updated reference of LCD ZZ1: FRD154BP2902-CTP ( now
LCD+CTP)

- added comment: CTP working with VDD_MCU from 1.8 to

3.6V

- added R105 100K to insure CTP INT is low at power-on.

- removed R11

-

pin26 of U6 STLINK, corrected name of power

+3V3_ST_LINK

- SB32 set: open by default

rev D-02 modifications:

- connected CN7 pin2 to PF5

- added two pull-up resistors to Reset of CTP one to VDD,
second one to +3V3. Not populated.

ote: Text in italic placed on a wire is not the net name. It just helps to identify rapidly

MCU IO related to this wire.

Schematics UM2032

211

MCU

MB1209 D-02

6/29/2016

Title:

Size: Reference:

Date: Sheet: of

A3

Revision:

STM32F412G-DISCO

Project:

PA4
PA5
PA6
PA7

PA10

PA0
PA1

PA15

PA3

PA13
PA14

PA2

PA8

PB5

PB7

PB14
PB15

PB10

PB8
PB9

PB1
PB2
PB3

PB0

PB4

PB11
PB12
PB13

PC0

PC2
PC3
PC4
PC5
PC6
PC7
PC8
PC9
PC10
PC11
PC12
PC13

I2C1_SCL
I2C1_SDA

uSD_D0
uSD_D1
uSD_D2
uSD_D3

uSD_CLK

C23

1.5pF

C30

1.5pF

R54

0

R56

0

C21 8.2pF

C19 8.2pF

R46

[N/A]

PH0-OSC_IN
PH1-OSC_OUT

PD0
PD1

PD2
PD3
PD4
PD5
PD6

PD7
PD8
PD9
PD10

PD12

PD13
PD14
PD15

D2
D3

D13
D14
D15

D0
D1

uSD_CMD

PE0

PE14
PE15

PE9

PE8

PE11

PE10

PE12
PE13

PE1

PE3

PE4

PE5

PE7

PF0

PF14
PF15

PF9

PF8

PF11

PF10

PF12
PF13

PF2
PF3
PF4
PF5
PF6
PF7

D4
D5
D6
D7
D8
D9
D10
D11
D12

A0

D[0..15]

A0

D[0..15]

A0

NRST

NRST

BOOT0

VDD_MCU

VDDA

VREF+

L1

BEAD

VDD_MCU

C8

2.2uF

C31

2.2uF

Ceramic capacitor (Low ESR)

C58
100nF

C76
100nF

C59
100nF

C15
1uF

C17
100nF

C10
1uF

C11
100nF

VDD_MCU

C60
100nF

C20
100nF

C75
100nF

C74
100nF

C73
100nF

VDD_MCU

C57
100nF

C68
100nF

C71
100nF

VDD_MCU

C9

4.7uF

VDD

PA0 - WKUP1

PA6

PA7

PA8- MCO1

PC1

PC2

PC3

PC4

PC5

PC8

R68

510

X3

NDK NX3215SA-32.768KHZ-EXS00A-MU00525

VDD_USB33

PE2

PE6

ARDUINO USART6_TX

ARDUINO USART6_RX

R69

[N/A]

QSPI_BK1_IO3

FMC_NOE
FMC_NWE

LED3

ARD_D5

ARD_D4

ARD_A0

ARD_D2
ARD_D1

ARD_D0
ARD_D8
ARD_D7

ARD_A1

ARD_A2

ARD_A3

ARD_A4

CODEC_I2S3_WS

R66 1K2
R67 1K2

VDD

PA1

PA2

PA4

PC9
PC10
PC11
PC12

SB31

Closed by default

VDD

LED4

PC13PC13-ANTI_TAMP

7

PC0

26

PC1

27

PC2

28

PC3

29

PA0-WKUP

34

PA1

35

PA2

36

PA3

37

PA4

40

PA5

41

PA6

42

PA7

43

PC4

44

PC5

45

PB0

46

PB1

47

PB2

48

PB10

69

PB11

70

PB12

73

PB13

74

PB14

75

PB15

76

PC6

96

PC7

97

PC8

98

PC9

99

PA8

100

PA9

101

PA10

102

PA11

103

PA12

104

PA13

105

PA14

109

PA15

110

PC10

111

PC11

112

PC12

113

PB3

133

PB4

134

PB5

135

PB6

136

PB7

137

PB8

139

PB9

140

PC14-OSC32_IN

8

PC15-OSC32_OUT

9

PH0-OSC_IN

23

PH1-OSC_OUT

24

NRST

25

BOOT0

138

PDR_ON

143

U7A

STM32F412ZGT6U

QSPI_BK1_IO2
QSPI_BK1_IO0
QSPI_BK1_IO1

ARD_D12

ARD_D13

PA5

ARD_D11

uSD_Detect

USB_OTGFS_VBUS

PA9

USB_OTGFS_ID

PA11
PA12

USB_OTGFS_DM

USB_OTGFS_DP

ARD_D10

ARD_A5

DFSDM_DATIN0

QSPI_CLK

CODEC_I2S3_SCK

CODEC_I2S3_SD

PB6

ARD_D15

ARD_D14

PA9

PA10

PA11

PA12

PA15

PB0

VBAT

6

VSSA

31

VREF+

32

VSS_2_0

107

VCAP2_0

106

VDD_4

39

VDD_3

144

VSS_11

130

VDD_2_USB33

95

VCAP1_0

71

VSS_10

120

VDD_5

17

VDDA

33

VDD_1_0

72

VDD_2_0

108

VDD_12

30

VDD_11

131

VDD_10

121

VSS_4

38

VDD_6

52

VDD_7

62

VDD_8

84

VSS_5

16

VSS_6

51

VSS_7

61

VSS_8

83

VSS_9

94

U7C

STM32F412ZGT6U

PC0 / WKUP2

DFSDM_CKOUT

CODEC_I2S3_MCK

FMC_NE1

LCD_RESET

LED1
LED2

JOY_RIGHT

JOY_LEFT

PE2

1

PE3

2

PE4

3

PE5

4

PE6

5

PF0

10

PF1

11

PE7

58

PE8

59

PE9

60

PE10

63

PE11

64

PE12

65

PE13

66

PE14

67

PE15

68

PF2

12

PF3

13

PF4

14

PF5

15

PF6

18

PF7

19

PF8

20

PF9

21

PF10

22

PF11

49

PF12

50

PF13

53

PF14

54

PF15

55

PE0

141

PE1

142

PD8

77

PD9

78

PD10

79

PD11

80

PD12

81

PD13

82

PD14

85

PD15

86

PD0

114

PD1

115

PD2

116

PD3

117

PD4

118

PD5

119

PD6

122

PD7

123

PG0

56

PG1

57

PG2

87

PG3

88

PG4

89

PG5

90

PG6

91

PG7

92

PG8

93

PG9

124

PG10

125

PG11

126

PG12

127

PG13

128

PG14

129

PG15

132

U7B

STM32F412ZGT6U

JOY_UP

JOY_DOWN

PG0
PG1
PG2

QSPI_BK1_NCS

USB_OTGFS_OVRCR
USB_OTGFS_PPWR_EN

I2C2_SCL

I2C2_SDA

SWO

SWDIO

SWCLK

PA13

PA14

USART2_TX

PA3

USART2_RX

ARD_D9

EXT_RESET

2_CKIN

2_CKIN

R45

[N/A]

SB22
Open by default

PH0

PH1

STLK_MCO

C26
1uF

C22
100nF

One 100nF placed close to each VDD_x pin of MCU

JOY_SEL

PC7

CODEC_I2S3ext_SD

CODEC_INT

PD11

BOOT0

LCD_TE

PG3

LCD_BLCTRL

CTP_INT

PC2

PD12

PC1

PC3

PD13

PE6

PE4

PE2

PE0
PE1

PE5

PE3

PD6

PB10

PB12

PB14

PB11

PB13

PB15

PB8

PB6

PB4

PB7

PB5

PB3

PB9

PB5

PB7

PB14
PB15

PB10

PB8
PB9

PB3
PB4

PB11
PB12
PB13

PB6

PC4

PC5

PC14

PC6

PC15

PC7

SB25

Open by default

SB23

Open by default

close to MCU

close to MCU

PE0
PE1

PE3

PE5

PE2

PE6

PB1

PB1

PB0

PB0

PF2
PF3

PF10

PG2

PG10
PG11
PG12
PG13
PG14

PF11

PG9

PF2
PF3

PF10
PF11

PG2

PG9
PG10
PG11
PG12
PG13
PG14

PG4

PG10
PG11
PG12
PG13
PG14

PG9

PG6
PG7
PG8

PG15

PG5

PF1

1 2

X2

NX3225GD-8.00M

R71
100K

PDR ON by default

I2C2_SDA

I2C2_SCL

1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26

CN7

[N/A]

D0 D1
D2
D3

D4 D5
D6 D7

D9
D10 D11
D12

D8

D13
D14 D15

LCD_TE LCD_RESET

A0

FMC_NWE

FMC_NOEFMC_NE1

GND

+3V3

VDD

LCD_TE

LCD_RESET

FMC_NWE

FMC_NOE

FMC_NE1

LCD signals access (2.54mm pitch)

PC14

PC15

ARD_D6

SB26

Closed by default

DFSDM_DATIN3

VDD_MCU

R91
56

PC1

SB34

Closed by default

SB35

Open by default

SB27

Open by default

VDD_MCU

SB20

Closed by default

Not Fitted

Not Fitted

Not Fitted

SB29

Open by default

PF13

PF13

PC0

ARD_D3

CTP_RST

R31 1K2
R70 1K2

PA10

PA14

PA13

PA15

PA8

PA6

PA4

PA7

PA5

PA3

PA5

PA7

PA10

PA8

PA3
PA4

PA13
PA14
PA15

PA6

PA1

PA1

PA2

PA2

SB16

Closed by default

SB15

Open by default

PC9

SB43

Open by default

VDD

PF5

LCD_BLCTRL

DocID029078 Rev 2 35/48

Figure 14. 32F412GDISCOVERY MCU

UM2032 Schematics

311

Power

MB1209 D-02

6/29/2016

Title:

Size: Reference:

Date: Sheet: of

A4

Revision:

STM32F412G-DISCO

Project:

E5V

+5V

1 2

PWR

LD6
Green

C3
10uF

C2
100nF

+5V +3V3

E5V

U5V_ST_LINK

Vin3Vout

2

1

Tab

4

U16
LD1117STR

C55
10uF

+2V+3V3

VDD_MCU

R9

820

VIN

C7
10uF(25V)

C4
10uF

Vin3Vout

2

1

Tab

4

U3
LD1117S50TR

Arduino power pin

U5V

1 2
3 4
5 6

JP3

Header 3X2

C6
10uF

GND

JP2

SB4

Closed by default

3

2

1

JP5

VDD_USB33

3

2

1

JP6

+3V3

Vin3Vout

2

1

Tab

4

U2
LD1117S33TR

Jumper to measure IDD of the MCU

1 2

JP7

VDD

GND

JP8

GND

JP9

GND

JP1

VDD_MCU IDD

VDD_USB

Voltage selection VDD_USB source selection

R92

68

R90

120

C84
10uF

VOUT = VREF (1 + R92 / R90)

VOUT = +2V +/- 50mV using R90=120ohms and R92=68ohms and 5% tol

36/48 DocID029078 Rev 2

Figure 15. 32F412GDISCOVERY Power

VDD= supply of peripherals

Open solder bridge if Discovery is supplied
from +3V3 of extension connector

VDD_MCU= supply of MCU pins VDD only

Schematics UM2032

411

LCD

MB1209 D-02

6/29/2016

Title:

Size: Reference:

Date: Sheet: of

A3

Revision:

STM32F412G-DISCO

Project:

PD5
PD4
PD7

VLED-

41

AVDD

37

VDDREG

34

GVSS

40

PVDD

38

P68

5

IM1

27

IM0

28

GND

44

DCX

29

D0

21

GND

22

WRX

30

VCS

4

VLED+

43

RDX

31

CSX

32

D14

7

VDDIO

33

D13

8

D1

20

D15

6

D6

15

D7

14

D8

13

D9

12

D10

11

D11

10

D12

9

VCC

35

VREF

36

MTP

39

NC

42

D2

19

D3

18

D4

17

D5

16

GND

23

VSYNC

24

TE

25

RESETB

26

TCOM

2

GND

1

GVDD

3

CN8

MOLEX 503304-4440

PF0

VDD

+3V3

LCD_BLCTRL

LCD_TE
LCD_RESET

A0
FMC_NWE
FMC_NOE
FMC_NE1

C72
100nF

C70
100nF

D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15

IM1
IM0

P68

R57

0

IM1

R55

0

IM0

R84

0

P68

VDD

Z1

STPS1L40M

C77

4.7uF/50V

L5

4.7uH(1A)

R43
10

BLGND

R47
100K

C81

4.7uF/10V

BLGND

BLGND

BLGND

Vi

1

Rset

2

GND3FB

4

NC

5

Vo

6

EN

7

SW

8

PGND

9

U17

STLD40DPUR

C78

10nF

C85
100nF

L3

BEAD

C79
10nF

VL

Backlight driver & PFC connector for LCD panel

BLGND

+5V

C82

10uF

L4

BEAD

C83

100nF

L6

BEAD

D8
D7 D6
D5 D4
D3 D2
D1 D0

LCD_RESET

LEDA
LEDK

FMC_NE1A0

FMC_NWEFMC_NOE

VDD +3V3

Common mode supply filter

LEDA

LEDK

Backlight control: ON/OFF or dimmer by low frequency (1 to 10kHz typ.) PWM using TIM5_CH3

PF5

LEDA

LEDK

current regulated at 15mA

L2

BEAD

Layout: parts close to STLD40D and grouped in same area with BLGND as local ground plane

Reserved use

R52
[N/A]

BLGND

L7

BEAD

R50
100K

+3V3

+3V3

C80
100nF

I2C1_SCLI2C1_SCL_CTP

I2C1_SDAI2C1_SDA_CTP

I2C max clock: 400kHz

SB36

Open by default

SB39
Open by default

VDD

I2C1_SCLI2C1_SCL_CTP

I2C1_SDAI2C1_SDA_CTP

2

13

G

SD

TR1
BSN20BK

2

13

G

SD

TR2
BSN20BK

I2C Level shifter option

lower voltage side

higher voltage side

(MCU )

(CTP)

SB38

Closed by default

SB17

Closed by default

SB37

Open by default

SB40

Open by default

PB7

PB6

I2C1_SDA

I2C1_SCL

CTP_INT

CTP_RST

PG5

PF12

R98

100K

Pull-down to insure CTP is in Reset at power-on

GND1FMARK

2

DB153DB14

4

DB135DB12

6

DB117DB10

8

DB99DB8

10

DB711DB6

12

DB513DB4

14

DB315DB2

16

DB117DB0

18

/RD19/WR

20

RS

21

/CS

22

RESET23IM

24

IOVCC25VCI

26

GND27LEDA

28

LEDK

29

CN15

FH26-29S-0.3SHW

D9

D10D11

D12D13

D14D15

Top side: layout of CN15

1

29

FRD154BP2902-CTP

FPC

CN15

ZZ1

FRD154BP2902-CTP

LCD_D[0..15]

D[0..15]

LCD_TE

PG4

LCD_TE

LCD_RESET

PD11

R41

100K

VDD

FMC_NE1

PD7

R99
100K

VDD

FMC_NWE

PD5

FMC_NOE

PD4

A0

PF0

PD14PD15

PD0PD1

PE7PE8

PE9PE10

PE11PE12

PE13PE14

PE15PD8

PD9PD10

PG4
PD11

240x240 pixels TFT LCD with Capaticitve Touch Panel

pixel (0,0) *

X

Y

*: standard orientation. Rotations by 90, 180, 270 degrees possible by registers.

L8

BEAD

+3V3

Not Fitted

R87
[N/A]

R65
[N/A]

+3V3

VDD

SB41

Open by default

SB42

Closed by default

LCD Operation: MCU operating voltage range 1.65 to 3.6V

not fitted

not fitted

(TR1, TR2, R65, R87 parts are not soldered)

SB45

Open by default

SB44

Closed by default

VDD

GND

10

VDD

9

IOVCC

8

RESET

7

GND

6

GND

1

INT

2

GND

3

SDA

4

SCL

5

CN14

DF37NB-10DS-0.4V (5x)

C87

100nF

Capacitive Touch Panel connector of FRD154BP2902-CTP

CTP operation: MCU operating voltage range 1.8 to 3.6V

Pull-down to insure CTP is in Reset at power-on

R105

100K

LCD+Touch FRIDA

R106

[N/A]

R107

[N/A]

+3V3

VDD

DocID029078 Rev 2 37/48

Figure 16. 32F412GDISCOVERY LCD

SB41 open and SB42 closed = IM high: LCD in 16bits mode
SB41 closed and SB42 opened = IMlow : LCD in 8bits mode

UM2032 Schematics

38/48 DocID029078 Rev 2

511

QSPI

MB1209 D-02

6/29/2016

Title:

Size: Reference:

Date: Sheet: of

A4

Revision:

STM32F412G-DISCO

Project:

QSPI_BK1_IO0

QSPI_BK1_IO2

QSPI_BK1_IO1

PF9

PF7

PF6

PB2

PG6

PF8

QSPI_BK1_IO3

VDD

QSPI_CLK

QSPI_BK1_NCS

R72
10K

DQ3/HOLD#

7

VCC

8

S#

1

DQ1

2

C

6

DQ0

5

VSS

4

DQ2/Vpp/W#

3

DQ3/

VCC

S

DQ

C

DQ0

VSS

DQ2/

/W

#

U12

MICRON N25Q128A13EF840F

QSPI_BK1_IO0

QSPI_BK1_IO1

QSPI_BK1_IO2

QSPI_BK1_IO3

QSPI_BK1_NCS

QSPI_CLK

Exposed central pad should not be connected to any voltage on PCB

VDD

C37
100nF

QSPI_CLK

TP3

QSPI_BK1_IO0

TP2

QSPI_BK1_IO1

TP1

R100 [N/A]

R104 [N/A]

VDD

R100 and R104:pull-up and pull-down to set PB2 in BOOT1 alternate function

Figure 17. 32F412GDISCOVERY Quad-SPI

#

1

Vpp
HOLD#

Schematics UM2032

DocID029078 Rev 2 39/48

711

Audio

MB1209 D-02

6/29/2016

Title:

Size: Reference:

Date: Sheet: of

A3

Revision:

STM32F412G-DISCO

Project:

CODEC_I2S3_SCK

ADCDAT1

F2

ADCLRCLK1/GPIO1

G3

AGND

D6

CPVDD

G9

CPVOUTN

H7

CPVOUTP

G7

CS/ADDR

G2

DACDAT1

E4

CPGND

H9

DCVDD

F1

DBVDD

D2

DGND

E2

CPCB

H8

AVDD1

D9

BCLK1

G1

CIFMODE

A4

CPCA

G8

DMICCLK

C6

AGND

E7

AGND

E8

AVDD2

D8

GPIO2/MCLK2

E1

GPIO3/BCLK2

H2

GPIO4/LRCLK2

F4

GPIO5/DACDAT2

H3

GPIO6/ADCLRCLK2

G4

GPIO7/ADCDAT2

E5

GPIO8/DACDAT3

H4

GPIO9/ADCDAT3

F5

GPIO10/LRCLK3

H5

GPIO11/BCLK3

F6

HP2GND

F7

HPOUT1FB

G5

HPOUT1L

H6

HPOUT1R

G6

HPOUT2N

F9

HPOUT2P

F8

IN1LN

D7

IN1LP

C8

IN1RN

B7

IN1RP

C7

IN2LN/DMICDAT1

B9

IN2LP/VRXN

B8

IN2RN/DMICDAT2

A9

IN2RP/VRXP

A8

LDO1ENA

D4

LDO1VDD

E9

LDO2ENA

D5

LDO2VDD

D1

LINEOUT1N

C5

LINEOUT1P

B5

LINEOUT2N

C4

LINEOUT2P

B4

LINEOUTFB

A6

LRCLK1

E3

MCLK1

D3

MICBIAS1

A7

MICBIAS2

B6

REFGND

A5

SCLK

H1

SDA

F3

SPKGND1

A1

SPKGND2

C1

SPKMODE

A3

SPKOUTLN

B1

SPKOUTLP

A2

SPKOUTRN

C3

SPKOUTRP

B3

SPKVDD1

B2

SPKVDD2

C2

VMIDC

C9

VREFC

E6

U15

WM8994ECS/R

C43100nF

C44100nF

VDD

+1V8

VDD

CODEC_I2S3_WS
CODEC_I2S3_SD

CODEC_INT

I2C1_SCL

PB7
PB6

CODEC_I2S3_MCK

PC7

C52100nF

C53100nF

R7920R80

20

C47 2.2uF

C46 2.2uF

C51 2.2uF

GND5DOUT

4

CLK

3

VDD1LR

2

U4

MP34DT01TR

GND5DOUT

4

CLK

3

VDD1LR

2

U5

MP34DT01TR

VDD

C13100nF

PB1

+3V3

C64100nF

+1V8

+3V3

+1V8

C63100nF

C12100nF

R97 [N/A]

VDD

R82 10K

R38 10K

C45 1uF

C661uF

C651uF

C544.7uF

C424.7uF

C414.7uF

C40

4.7uF

C48

4.7uF

PC2

I2C1_SDA

DFSDM_DATIN0

DFSDM_CKOUT

R94

0

R88 0

R93 0

R95 0

R86 0

2

6

4

3

CN9

PJ3028B-3

R63

0

GND

GNDGND

GND

R78

2K2

C39

1uF

CODEC_I2S3ext_SD

R96 0

R77
10K

C50100nF

C49100nF

SB33

Closed by default

PB12
PA4
PB5
PB4
PG2

SPKOUTRN
SPKOUTRP

DOUT

1

L/R

2

L

/

GND

3

CLK

4

VDD

5

U14

MP23DB01MM

DOUT

1

L/R

2

GND

3

CLK

4

VDD

5

U13

MP23DB01MM

DFSDM_DATIN3

PE4

Open this solder bridge if PE4 is used externally at the Extension connecto r

Not Fitted

Not Fitted

51

2

GND

3

4

BYPASS

INH

Vin Vout

U18

LD3985M18R

+1V8

C33
10nF

+3V3

SB32

Open by default

Figure 18. 32F412GDISCOVERY Audio

UM2032 Schematics

21mm distance between a pair of microphones

L/R

R

Operating range: 1.62<VDD<3.6V

40/48 DocID029078 Rev 2

611

Peripherals

MB1209 D-02

6/29/2016

Title:

Size: Reference:

Date: Sheet: of

A4

Revision:

STM32F412G-DISCO

Project:

MICRO SD

uSD_CLK
uSD_CMD

SMS064FF or SMS128FF

1234567

8

SW29SW1

10

CN13
PJS008-2000

uSD_D0

uSD_D1

uSD_D2

uSD_D3

uSD_Detect

R64

0

PC8

PC9

PC10

PC11

PC12
PD2

(TF) Card

R119
47K

R115
47K

R113
47K

R118
47K

R117
47K

Reset Button

1 2
3 4
5 6
7 8

CN10

F206A-2*04MGF-A

PB9
PB10

EXT_RESET

PF11

SSM-104-L-DH (Samtec)

I2C Extension Connector

1 2

LD3
Red

1 2

LD2
Orange

1 2

LD4
Blue

1 2

LD1
Green

+3V3

R5

510

R4

680

R3

680

R2

680

LEDs

LED1

LED2

LED3

LED4

1

43

2

B1
TD-0341 [RESET/Black]

C1
100nF

R8
100K

NRST

PE0

SB1
Closed by default

PE1

PE2

PE3

The 4 LEDs are top side

PD3

I2C2_SDA
I2C2_SCL

R24
[N/A]

R28
[N/A]

R22
[N/A]

R26
[N/A]

R30
[N/A]

VDD

R23

100

JOY_SEL

JOY_DOWN

JOY_LEFT

JOY_RIGHT

JOY_UP

JOYSTICK

PF14

PF15

PG0

PG1

VDDVDD

VDD

VDD

PA0 - WKUP1

Right side

Left side

COMMON

5

Selection

2

DOWN

3

LEFT

1

RIGHT

4

UP

6

B2

MT008-A

Figure 19. 32F412GDISCOVERY Peripherals

Schematics UM2032

DocID029078 Rev 2 41/48

811

USB_OTG_FS

MB1209 D-02

6/29/2016

Title:

Size: Reference:

Date: Sheet: of

A3

Revision:

STM32F412G-DISCO

Project:

+5V

+3V3

R13 0

VBUS

1

DM

2

DP

3

ID

4

GND

5

Shield

6

USB_Micro-AB receptacle

Shield

7

Shield

8

Shield

9

EXP

10

CN3

475900001

PA9

PA10

PA11
PA12

R76 0
R75 0

Dz

A2

ID

A3

Pd1

B1

Pup

B2

Vbus

B3

D+in

C1

Pd2

C2

D+out

C3

D-in

D1

GND

D2

D-out

D3

D1

EMIF02-USB03F2

12

LD7
Green

PG8

R17
47K

USB_OTGFS_VBUS

U5V

USB_OTGFS_DM
USB_OTGFS_DP
USB_OTGFS_ID

USB_OTGFS_OVRCR

PG7

USB_OTGFS_PPWR_EN

MICROAB_N

MICROAB_P

R21
0

12

LD8
Red

R18
620

C5

4.7uF

R14

47K

R12
330

+3V3

R10
10K

R20 0

GND

2

IN

5

EN

4

OUT

1

FAULT

3

U1

STMPS2141STR

R16
47K

Open Drain

3

1

2

T1
9013-SOT23

Figure 20. 32F412GDISCOVERY USB OTG FS

UM2032 Schematics

USB Full Speed operating range voltage: 3.0V<VDDUSB<3.6V

transistor pins numbers follow
SOT23 JEDEC standard,

VBUS OK

42/48 DocID029078 Rev 2

911

Extension connectors

MB1209 D-02

6/29/2016

Title:

Size: Reference:

Date: Sheet: of

A4

Revision:

STM32F412G-DISCO

Project:

NRST

VDD_MCU

1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 34
35 36
37 38
39 40
41 42
43 44
45 46
47 48
49 50

P1

Header 25X2

1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 34
35 36
37 38
39 40
41 42
43 44
45 46
47 48
49 50

P2

Header 25X2

PE5

PE6

PA1

PA5

PA6PA7

PA8

PA15

PB1

PB8 PB9

PB10

PB13 PB14
PB15

PB0

PC1
PC3

PC4PC5

PC14 PC15

PC0

PD6

PD12

PD13

PH1PH0

VDD_MCU

VDD_MCU

+3V3+3V3

PB11

MCO_1

PE2 PE3

PE4

PC13

PA4

PB12

PC6 PC7

PA10 PA13

PA14

PB3

PB5

PB7

PB4

PB6

PE0 PE1

SPI4_MISO/SPI5_MISO/TIM9_CH1

SPI4_MOSI/I2S4_SD/SPI5_MOSI/I2S5_SD/TIM9_CH2

I2C2_SMBA

TIM5_CH1

SPI_2_MOSI/I2S2_SD/I2C_4_SCL/TIM_1_CH3N/TIM8_CH3N/TIM12_CH2/RTC_50Hz

I2C4_SMBA/USART3_RX/ADC1_15

TIM5_CH4

SPI2_MOSI/I2S2_SD/ADC1_13

ADC1_11/WKUP3

SPI4_MOSI/I2S4_SD/USART2_RTS/ADC1_1/TIM2_CH2/TIM5_CH2

ADC1_10/WKUP2

USART3_RTS/TIM4_CH1/I2C4_SCL

DFSDM_clocking/I2S2_CKIN/I2C2_SDA

SPI2_SCK/I2S2_CK/I2S3_MCK/I2C2_SCL/I2C4_SCL/USART3_TX/TIM2_CH3

SPI_2_MISO//I2S2ext_SD/I2C_4_SDA/USART_3_RTS/TIM_1_CH2N_8_CH2N_12_CH1SPI2_SCK/I2S2_CK/SPI4_SCK/I2S4_CK/USART3_CTS/CAN2_TX/TIM1_CH1N

SPI5_NSS/I2S5_WS/ADC1_9/TIM1_CH3N/TIM3_CH4TIM/8_CH3N/DFSDM_DATIN0

I2C4_SDA/TIM4_CH2

SPI5_MOSI/I2S5_SD/I2C1_SCL/I2C3_SDA/CAN1_RX/TIM4_CH3/TIM10_CH1

SPI3_MOSI/3_SD/USART2_RX

SPI1_NSS/1_WS/USART1_TX/TIM2_CH1/2_ETR

I2S2_MCK/I2C4_SCL/USART6_TX/TIM3_CH1/TIM8_CH1

I2S1_MCK/ADC1_14

SPI2_NSS/I2S2_WS/I2C1_SDA/I2C2_SDA/CAN1_TX/TIM4_CH4/TIM11_CH1

BOOT0

SPI1_MOSI/I2S1_SD/ADC1_7/TIM1_CH1N/TIM3_CH2/TIM8_CH1N/TIM14_CH1 SPI1_MISO//ADC1_6/TIM3_CH1/TIM13_CH1

SPI1_NSS/I2S1_WS/SPI3_NSS/I2S3_WS/ADC1_4SPI1_SCK/I2S1_CK/ADC1_5/TIM2_CH1/2_ETR/TIM8_CH1N

SPI5_SCK/I2S5_CK/ADC1_8/TIM1_CH2N/TIM3_CH3/TIM8_CH2N

TAMP1

USART6_RX

CAN2_RX

USART6_RTS/CAN2_TX USART6_CTS

USART6_TX

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

**
*
*
*
*
*
*
*
*
*
*

*

*

*
*
*

*
**

*

*

*

*

*

*

*

*

*

*

*

*

*

**
*
*
*
*
*

*
*
*
*
*

*
*
*

*

*

(right side)

(left side)

shared with LED3 shared with LED4

shared with LSE crystal shared with LSE crystal

shared with HSE crystal

A
A
A

A

CA
AA
AA
AD

PC2

*

D

SPI2_MISO/I2Sext_SD/DFSDM-CKOUT/ADC1_12

shared with EXT_RESET

A

DC

C

C

D

shared with USB_OTGFS_ID JTMS-SWDIO

JTCK-SWCLK

A

A

A

AA
AA
A

JTDO-SWO

CC

CC

AA

shared with LED1 shared with LED2

NRST
PC0
PC2

PA4
PA6
PC4
PB0

PB10
PB12
PB14

PD12

PC1
PC3
PA1

PA7
PC5
PB1

PA5

PB11
PB13
PB15

PD13

PH1
PC15
PC13

PE1

PB7
PB5
PB3

PE5
PE3

PB9

PD6

PA13

PA15

PC7

PH0
PC14
PE6
PE4
PE2
PE0
PB8

BOOT0

PB6

PA14
PA10
PA8

PB4

PC6

PA2PA3

**

I2S2_CKIN/USART2_TX/ADC1_2/TIM2_CH3/TIM5_CH3/TIM9_CH1I2S2_MCK/USART2_RX/ADC1_3/TIM2_CH4/TIM5_CH4/TIM9_CH2

SPI2_NSS/I2S2_WS/SPI3_SCK/I2S3_CK/SPI4_NSS/I2S4_WS/I2C2_SMBA/USART2_RX

PA2PA3

* : pin compatible with STM32F401-DISCO and STM32F411-DISCO
A : shared with Arduino connectors
C : shared with CODEC
D : shared with Digital microphones

PF2
PF3
PF10 PF11

PG2
PG9

PG10 PG11
PG12 PG13
PG14 SPKOUTRN

SPKOUTRP

PF2
PF3
PF10 PF11

PG2
PG9

PG10 PG11
PG12 PG13
PG14 SPKOUTRN

SPKOUTRP

+5V+5V

Not Fitted

Not Fitted

PF13

PF13

I2C4_SMBA

V : shared with Virtual Com Port

VV

T : shared with Capacitive Touch Panel

I2C1_SCL shared with Codec and CTP I2C1_SDA shared with Codec and CTP

TT

PC9 MCO_2/I2S2_CKIN/I2C3_SDA /TIM3_CH4 /TIM8_CH4

*

S

S : shared with MicroSD

Figure 21. 32F412GDISCOVERY extension connectors

Alternate functions available:

SPI1, SPI2, SPI4
I2C1, I2C2 with SMBA , I2C4 FM+ 1MHz with SMBA
USART3 Rx,Tx,Cts,Rts, USART6 Rx,Tx,Cts,Rts
CAN1, CAN2
14 ADC inputs
>15 Timer channels
I2S2 full duplex with SD and extSD
DFSDM input for stereo PDM microphones

Schematics UM2032

DocID029078 Rev 2 43/48

10 11

Arduino Uno connector

MB1209 D-02

6/29/2016

Title:

Size: Reference:

Date: Sheet: of

A4

Revision:

STM32F412G-DISCO

Project:

Arduino uno connector

+3V3+5V

A0
A1
A2
A3
A4
A5

RX/D0

TX/D1

D2

D4

PWM/D3

PWM/D5

PWM/D6

D7

D8

PWM/D9

PWM/CS/D10

SDA/D14

SCL/D15

PB10
PB9

NRST

VIN

NRST

SCK/D13

MISO/D12

PWM/MOSI/D11

12

LD9

Green

R73

510

AVDD

GND

VREF+

C38
[N/A]

R74

0

ARD_A0
ARD_A1
ARD_A2
ARD_A3

ARD_A4

ARD_A5

ARD_D5
ARD_D4
ARD_D3
ARD_D2
ARD_D1
ARD_D0

ARD_D13
ARD_D12
ARD_D11
ARD_D10

ARD_D9
ARD_D8

ARD_D6

ARD_D7

ARD_D15

ARD_D14

PA1
PC1
PC3
PC4

PC5

PB0

PG9

PG14

PG13

PG12

PF10

PF3

PG11

PG10

PB8

PA15

PA7

PA6

PA5

ADC1_IN8

ADC1_IN15

ADC1_IN14

ADC1_IN13

ADC1_IN11

ADC1_IN1

I2C2_SDA

PB9

PB10

I2C2_SCL

USART6_RX

USART6_TX

TIM5_CH2

TIM5_CH4

TIM4_CH3

TIM2_CH1, SPI1_NSS

TIM3_CH2, SPI1_MOSI

SPI1_MISO

SPI1_SCK

SB5
Open by default

SB6
Closed by default

SB8
Closed by default
SB7
Open by default

SB30
Closed by default

IOREF
NRST
3V3
5V
GND
GND
VIN

POWER

AIN

I2C2_SCL

I2C2_SDA

1

2

3

4

5

6

7

8

9

10

CN12

Header 10X1_Female

1
2
3
4
5
6
7
8

CN2

Header 8X1_Female

1
2
3
4
5
6

CN1

Header 6X1_Female

1

2

3

4

5

6

7

8

CN11

Header 8X1_Female

TIM5_CH1

PF4

Figure 22. 32F412GDISCOVERY Arduino Uno V3 connector

UM2032 Schematics

44/48 DocID029078 Rev 2

11 11

ST-LINK/V2-1

MB1209 D-02

6/29/2016

Title:

Size: Reference:

Date: Sheet: of

A4

Revision:

STM32F412G-DISCO

Project:

STM_RST

T_JTCK

T_JTCK

T_JTDO

T_JTDI

T_JTMS

OSC_IN
OSC_OUT

T_NRST

AIN_1

USB ST-LINK

COM

Board Ident: PC13=0

T_SWDIO_IN

LED_STLINK
MCO

STLINK_RX

STLINK_TX

T_SWO

R85 1K5
R40 0
R39 0

R37
[N/A]

R44
100K

R36
10K

R103 4K7

R102 4K7

C14
10pF

C16
10pF

C18
100nF

USB_RENUMn

USB_RENUMn

+3V3_ST_LINK

+3V3_ST_LINK

+3V3_ST_LINK

PWR_EXT

D4

BAT60JFILM

C24

1uF

C86
10nF

C34
1uF

51

2

GND

3

4

BYPASS

INH

Vin Vout

U9 LD3985M33R

C25
100nF

C35
100nF

+3V3_ST_LINK

R42

10K

R81
36K

R83
100

+3V3_ST_LINK

E5V

R48
100K

D6

BAT60JFILM

PWR_ENn

C56
100nF

C61
100nF

C62
100nF

C67
100nF

+3V3_ST_LINK

3

1

2

T2

9013-SOT23

VUSB_ST_LINK

VUSB_ST_LINK

VUSB_ST_LINK

VDD

LED_STLINK

R1
100R7100

R6
0

+3V3_ST_LINK

STM_JTMS

STM_JTCK

D5

BAT60JFILM

T_JRST

STL_USB_DM

STL_USB_DP

STL_USB_DM
STL_USB_DP

R32

100K

R34

2K7

R33

4K7

+5V

CUR_SEL

IN

1

IN

2

ON

3

GND

4

SET

5

OUT

6

OUT

7

FAULT

8

U8

ST890CDR

VUSB_ST_LINK U5V_ST_LINK

R51

10K

R62

2K7

C32

100nF

D3

BAT60JFILM

+3V3_ST_LINK

VBAT

1

PC13

2

PC14

3

PC15

4

OSC_IN

5

OSC_OUT

6

/RST

7

VSSA

8

VDDA

9

PA0

10

PA1

11

U2_TX

12

U2_RX13U2_CK14S1_CK15S1_MISO16S1_MOSI17PB018PB119PB2/BOOT120PB1021VSS_123VDD_1

24

PB12

25

PB11

22

S2_CK

26

S2_MISO

27

S2_MOSI

28

PA8

29

PA9

30

PA10

31

PA11

32

PA12

33

JTMS

34

VSS_2

35

VDD_2

36

JTCK

37

JTDI

38

JTDO

39

JNRST

40

PB541PB642PB7

43

BOOT0

44

PB845PB9

46

VSS_3

47

VDD_3

48

U6
STLINK

U5V

output current limitation : 500mA

SB19

Open by default

R89 100K

R101 [N/A]

+3V3_ST_LINK

USB Virtual ComPort

Not Fitted

STLK_MCO

C69
[N/A]

MCO

SB18
Open by default

T_JTCK

T_JTMS

SWD to MCU

123

4

CN5

SB14 SB13

SB11 SB12

SB10 SB9

SB2

Closed by default

SB3

Open by default

STM_JTMS

STM_JTCK

SWD

RESERVED

DEFAULT

R25

22

R19

22

TCK/SWCLK
TMS/SWDIO

R27

10K

1
2
3
4
5
6

CN4

Header 6

AIN_1

T_NRST

T_SWO

NRST

R15

22

R11

[N/A]

SB21

Closed by default

SB28

Closed by default

T_NRST

SWO_MCU

D2

BAT60JFILM

R29

[N/A]

SWCLK

PA14

SWDIO

PA13

SWO

PB3

R35 [N/A]

Red

_Green

21

34

LD5
HSMF-A201-A00J1

T_JTDO

T_JTMS

C29

100nF

C36

100nF

VccA

1

A1

2

A2

3

GND4DIR

5

B2

6

B1

7

VccB

8

U11

SN74LVC2T45DCUT

VDD

T_SWO

+3V3_ST_LINK

SWO_MCU

SB24
Closed by default

VCCA

1

A1

2

A2

3

GND4DIR

5

B2

6

B1

7

VCCB

8

U10

SN74LVC2T45DCUT

VDD

VDD

C28
100nF

C27
100nF

R59
100K

R58
100K

+3V3_ST_LINK

R61
0

1 2

JP4
[N/A]

+3V3_ST_LINK

R49

0

USART2_TX

USART2_RX

PA2

PA3

1 2

X1

NX3225GD-8.00M

R53

56

1 2

FAULT

LD10

Red

R60

820

VBUS

1

DM

2

DP

3

ID

4

GND

5

Shield

6

USB_Micro-B receptacle

Shield

7

Shield

8

Shield

9

EXP

10

EXP

11

CN6

1050170001

Text

+3V3_ST_LINK

Figure 23. 32F412GDISCOVERY ST-LINK/V2-1

STLINK power supply

Power Switch to supply +5V
from STLINK USB

Schematics UM2032

transistor pins numbers follow
SOT23 JEDEC standard,

To use the Discovery as programmer of an external STM32:

- Insure the STM32 to programm on an external board is supplied
with 3.3V ONLY!

- Remove the two jumpers on CN5 to left pins 1, 2, 3, 4 open

- Connect following pins of CN4 to the STM32 to programm:
to SWCLK, pin3 to GND, pin4 to SWDIO, pin5 to RESET.

pin2

Jumpers ON --> DISCOVERY Selected
Jumpers OFF and Solder bridge on T_SWO removed --> ST-LINK Selected

UM2032 Federal Communications Commission (FCC) and Industry Canada (IC) Compliance

Appendix B Federal Communications Commission (FCC)

and Industry Canada (IC) Compliance
Statements

B.1 FCC Compliance Statement

B.1.1 Part 15.19

This device complies with Part 15 of the FCC Rules. Operation is subject to the following
two conditions: (1) this device may not cause harmful interference, and (2) this device must
accept any interference received, including interference that may cause undesired
operation.

B.1.2 Part 15.105

This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference in which case the user will be required to correct
the interference at his own expense.

B.1.3 Part 15.21

Any changes or modifications to this equipment not expressly approved by
STMicroelectronics may cause harmful interference and void the user's authority to operate
this equipment.

B.2 IC Compliance Statement

B.2.1 Compliance Statement

Industry Canada ICES-003 Compliance Label: CAN ICES-3 (A)/NMB-3(A)

B.2.2 Déclaration de conformité

Étiquette de conformité à la NMB-003 d'Industrie Canada : CAN ICES-3 (A)/NMB-3(A)

DocID029078 Rev 2 45/48

47

CISPR32 UM2032

Appendix C CISPR32

C.1 Warning

Warning: This device is compliant with Class A of CISPR 32. In a residential environment,
this equipment may cause radio interference.

46/48 DocID029078 Rev 2

UM2032 Revision history

Revision history

Table 15. Document revision history

Date Revision Changes

28-Jul-2016 1 Initial version.

Added sections:

08-Nov-2016 2

Section Appendix B: Federal Communications Commission
(FCC) and Industry Canada (IC) Compliance Statements,
Section Appendix C: CISPR32.

DocID029078 Rev 2 47/48

47

UM2032

IMPORTANT NOTICE – PLEASE READ CAREFULLY

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Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or
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Information in this document supersedes and replaces information previously supplied in any prior versions of this document.

© 2016 STMicroelectronics – All rights reserved

48/48 DocID029078 Rev 2