Discovery kit for STM32F3 series with STM32F334C8 · PDF fileDiscovery kit for STM32F3 series with STM32F334C8 MCU ... STM32F334 discovery board hardware block diagram ... circuit

February 2016 DocID025953 Rev 2 1/33

UM1735User manual

Discovery kit for STM32F3 series with STM32F334C8 MCU

Introduction

The STM32F334 discovery kit (32F3348DISCOVERY) helps the user discover the full range of features of the STM32F334 line and develop applications. It is based on STM32F334C8T6 and includes ST-LINK/V2-1 embedded debug tool interface, high-brightness LED dimming with buck converter, buck/boost converter, LEDs and pushbuttons.

The board comes with a comprehensive STM32 software HAL library with various packaged software examples, as well as direct access to mbed™ online resources at http://mbed.org.

Figure 1. STM32F334 discovery board

Picture not contractual.

www.st.com

http://www.st.com

Contents UM1735

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Contents

1 Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2 Ordering and product information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.1 Product marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.2 Order code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4 Hardware layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.1 Embedded ST-LINK/V2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.1.1 Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.1.2 ST-LINK/V2-1 firmware upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.1.3 VCP configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.1.4 Using ST-LINK/V2-1 to program/debug the STM32F334 MCU on board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.1.5 Using ST-LINK/V2-1 to program/debug an external STM32 application 15

4.2 Power supply and power selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.2.1 Power supply input from the USB connector . . . . . . . . . . . . . . . . . . . . . 17

4.2.2 External power supply inputs: 5V_IN . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4.3 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.4 Pushbuttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.5 High brightness LED dimming with buck converter . . . . . . . . . . . . . . . . . 18

4.6 Buck/boost converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.7 JP3 (Idd) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.8 BOOT0 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.9 USART configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.10 OSC clock supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.11 Solder bridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.12 Extension connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

5 Mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6 Electrical schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

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UM1735 Contents

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7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

List of tables UM1735

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List of tables

Table 1. ON/OFF conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Table 2. Jumper states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Table 3. Debug connector CN2 (SWD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Table 4. Solder bridges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Table 5. Extension connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Table 6. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

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UM1735 List of figures

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List of figures

Figure 1. STM32F334 discovery board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Figure 2. STM32F334 discovery board hardware block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Figure 3. Top layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Figure 4. Bottom layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Figure 5. Updating the list of drivers in device manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Figure 6. STM32F334 discovery board connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Figure 7. ST-LINK/V2-1 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Figure 8. STM32F334 discovery board mechanical drawing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Figure 9. STM32F334 discovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Figure 10. ST-LINK/V2-1 (SWD only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Figure 11. STM32F334C8T6 MCU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Figure 12. LED buck converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Figure 13. Buck/boost converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Conventions UM1735

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1 Conventions

Table 1 provides the definition of some conventions used in the present document.

Table 1. ON/OFF conventions

Convention Definition

Jumper JPx ON Jumper fitted

Jumper JPx OFF Jumper not fitted

Solder bridge SBx ON SBx connections closed by Solder

Solder bridge SBx OFF SBx connections left open

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UM1735 Ordering and product information

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2 Ordering and product information

The STM32F334 discovery kit is a low-cost and easy-to-use development kit to quickly evaluate and start a development with an STM32F3 series microcontroller.

Before installing and using the product, please accept the Evaluation Product License Agreement from www.st.com/epla.

For more information on the STM32F334 discovery board and for demonstration software, visit www.st.com/stm32f3-discovery.

2.1 Product marking

Tools marked as "ES" or "E" are not yet qualified and as such, they may be used only for evaluation purposes. ST shall not be liable for any consequences related with other ways of use of such non-qualified tools, for example, as reference design or for production.

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

• on target STM32 microcontroller part mounted on the board (for illustration, refer to section "Package information" in its datasheet at www.st.com)

• next to the evaluation tool ordering part number, as a label stuck or a silk-screen printed on the board

2.2 Order code

To order the Discovery kit for STM32F334 line microcontrollers, use the order code: STM32F3348-DISCO.

Features UM1735

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3 Features

The STM32F334 discovery board offers the following features:

• STM32F334C8T6 microcontroller featuring 64 Kbytes of Flash memory, 16 Kbytes of RAM in an LQFP48 package

• on-board ST-LINK/V2-1 with selection mode switch to use the kit as a standalone programming and debugging tool (with SWD connector for programming and debugging)

• mbed™-enabled (mbed.org)

• USB ST-LINK with re-enumeration capability and three different interfaces:

– virtual COM port

– mass storage

– debug port

• board power supply: through USB bus or from an external 5 V supply voltage

• external application power supply: 3 V and 5 V

• high brightness LED dimming with buck converter

• one buck/boost converter

• six LEDs:

– LD1 (red) for 3.3 V power on

– LD2 (red/green) for USB communication

– four user LEDs: LD3 (red), LD4 (orange), LD5 (green) and LD6 (blue)

• two pushbuttons (user and reset)

• extension header for LQFP48 I/Os for a quick connection to the prototyping board and easy probing

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UM1735 Hardware layout

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4 Hardware layout

The STM32F334 discovery board has been designed around the STM32F334C8T6 microcontroller in a 48-pin LQFP package.

Figure 2 illustrates the connections between the STM32F334C8T6 and its peripherals (ST-LINK/V2-1, high brightness LED dimming with buck converter, buck/boost converter, LEDs, pushbuttons).

Figure 3 and Figure 4 help you to locate these features on the STM32F334 discovery board.

Figure 2. STM32F334 discovery board hardware block diagram

Hardware layout UM1735

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Figure 3. Top layout

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Figure 4. Bottom layout


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4.1 Embedded ST-LINK/V2-1

The ST-LINK/V2-1 programming and debugging tool is integrated on the STM32F334 discovery board.

The embedded ST-LINK/V2-1 tool supports only SWD for STM32 devices. For information about debugging and programming features, refer to user manual UM1075 (ST-LINK/V2 in-circuit debugger/programmer for STM8 and STM32) that describes in detail all the ST-LINK/V2 features.

The changes versus ST-LINK/V2 are listed below.

• New features supported on ST-LINK/V2-1:

– USB software re-enumeration

– virtual COM port interface on USB (Section 4.1.3)

– mass storage interface on USB

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

• Features not supported on ST-LINK/V2-1:

– SWIM interface

– minimum supported application voltage limited to 3 V

There are two different ways to use ST-LINK/V2-1, depending on the jumper states (see Table 2):

• program/debug the MCU on board (Section 4.1.4)

• program/debug an MCU in an external application board using a cable connected to SWD connector CN3 (Section 4.1.5)

4.1.1 Drivers

ST-LINK/V2-1 requires a dedicated USB driver that, for Windows XP, 7 and 8, can be found at www.st.com.

In case the STM32F334 discovery board is connected to the PC before the driver is installed, some discovery interfaces may be declared as “Unknown” in the PC device manager. In this case the user must install the driver files (Figure 5), and from the device manager update the driver of the connected device.

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

Table 2. Jumper states

Jumper state Description

Both CN3 jumpers ON ST-LINK/V2-1 functions enabled for on board programming (default)

Both CN3 jumpers OFFST-LINK/V2-1 functions enabled for application through external CN2 connector (SWD supported)

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Figure 5. Updating the list of drivers in device manager

4.1.2 ST-LINK/V2-1 firmware upgrade

ST-LINK/V2-1 embeds a firmware upgrade mechanism for in-situ upgrade through the USB port. As the firmware may evolve during the life time of the ST-LINK/V2-1 product (for example new functionality, bug fixes, support for new microcontroller families), it is recommended to visit www.st.com periodically in order to stay up-to-date with the latest firmware version.

4.1.3 VCP configuration

ST-LINK/V2-1 supports virtual COM port (VCP). To enable this function, the solder bridges SB14 and SB16 (See Figure 4: Bottom layout) for mbed support are closed. Table 4: Solder bridges indicates this with ON state.


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4.1.4 Using ST-LINK/V2-1 to program/debug the STM32F334 MCU on board

To program the STM32F334 MCU on board, simply plug in the two jumpers on CN3, as shown in Figure 6 in red, but do not use the CN2 connector as that could disturb communication with the STM32F334C8T6 of the STM32F334 discovery board.

Figure 6. STM32F334 discovery board connections

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4.1.5 Using ST-LINK/V2-1 to program/debug an external STM32 application

It is very easy to use ST-LINK/V2-1 to program an STM32 microcontroller on an external application. Simply remove the 2 jumpers from CN3 as shown in Figure 7 and connect your application to the CN2 debug connector according to Table 3.

Note: SB11, must be OFF if you use CN2 pin 5 (NRST) in your external application.

SB17, must be OFF if you use CN2 pin 6 (SWO) in your external application.

Table 3. Debug connector CN2 (SWD)

Pïn CN2 Designation

1 VDD_TARGET VDD from application

2 SWLCK SWD clock

3 GND Ground

4 SWDIO SWD data input/output

5 NRST RESET of target MCU

6 SWO Reserved


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Figure 7. ST-LINK/V2-1 connections

4.2 Power supply and power selection

The power supply is provided either by the host PC through the USB cable, or by an external 5 V power supply.

The STM32F334 discovery board requires to the Host PC 500mA, but around 300mA is needed for its demo, 100mA for an extension board and a safety margin of 100mA.

The D2 and D3 diodes protect the 5 V pins from external power supplies:

• 5 V and 3 V can be used as output power supplies when an extension board is connected to pins P1 and P2. In this case, the 5V_O and 3V_O pins deliver a 5 V or 3.3 V power supply and the power consumption of the extension board must be lower than 100 mA.

• 5 V can also be used as input power supplies, e.g. when the USB connector is not connected to the PC. ( 5V_I pin of P1 Header) In this case, the STM32F334 discovery board must be powered by a power supply unit

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or by auxiliary equipment complying with standard EN-60950-1: 2006+A11/2009, and must be Safety Extra Low Voltage (SELV) with limited power capability.

4.2.1 Power supply input from the USB connector

ST-LINK/V2-1 supports USB power management allowing to request more than 100 mA current to the host PC.

All parts of the STM32F334 discovery board and extension board can be powered from the ST-LINK/V2-1 USB connector CN1 (U5V or VBUS). Note that only the ST-LINK/V2-1 part is power supplied before the USB enumeration as the host PC only provides 100 mA to the board at that time. During the USB enumeration, the STM32F334 discovery board requires 500 mA of current to the Host PC. If the host is able to provide the required power, the targeted STM32 microcontroller is powered and the red LED LD1 is turned on, thus the STM32F334 discovery board and its extension board can consume a maximum of 500 mA current, not more. If the host is not able to provide the required current, the targeted STM32 microcontroller and the MCU part including the extension board are not power supplied. As a consequence the red LED LD1 remains turned OFF. In such case it is mandatory to use an external power supply as explained in the next chapter.

Warning: If the maximum current consumption of the STM32F334 discovery and its extension boards exceeds 500 mA, it is mandatory to power the STM32F334 discovery using an external power supply connected to 5V_IN.

Note: In case of this board is powered by an USB charger or USB battery then there is no USB enumeration so the led LD1 remains OFF permanently and the target MCU is not powered. In this specific case the jumper JP1 needs to be ON to allow target MCU to be powered anyway. This is a special use without enumeration and JP1 is not soldered. To use this optional power supply, solder a 2 pins header in JP1 and set a jumper (you can use a jumper plugged on P3 or P4)

4.2.2 External power supply inputs: 5V_IN

The external power source 5V_IN is automatically detected, in this case the current consumption of STM32F334 discovery board and extension board exceed the allowed current on USB. In this condition it is still possible to use the USB for communication, for programming or debugging only, but it is mandatory to power supply the board first using 5V_IN then connect the USB cable to the PC. Proceeding this way ensures that the enumeration occurs thanks to the external power source.

The following power sequence procedure must be respected:

1. Connect the external power source to 5V_IN.

2. Power on the external power supply 5V_IN.

3. Check that LD1 is turned on.

4. Connect the PC to USB connector CN1.

If this order is not respected, the board may be supplied by VBUS first then by 5V_IN, and the following risks may be encountered:


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1. If more than 500 mA current is needed by the board, the PC may be damaged or the current supply can be limited by the PC. As a consequence the board is not powered correctly.

2. 500 mA is requested at enumeration (since JP1 must be OFF) so there is risk that the request is rejected and the enumeration does not succeed if the PC cannot provide such current. Consequently the board is not power supplied (LED LD1 remains OFF).

4.3 LEDs

• LD1 PWR: The red LED indicates that the board is powered.

• LD2 COM: LD2 default status is red. LD2 turns to green to indicate that communications are in progress between the PC and ST-LINK/V2-1.

• User LD3: The red LED is a user LED connected to the I/O PB6 of the STM32F334C8T6.

• User LD4: The orange LED is a user LED connected to the I/O PB8 of the STM32F334C8T6.

• User LD5: The green LED is a user LED connected to the I/O PB9 of the STM32F334C8T6.

• User LD6: The blue LED is a user LED connected to the I/O PB7 of the STM32F334C8T6.

4.4 Pushbuttons

• B1 USER: User and Wake-Up button connected to the I/O PA0 of the STM32F334C8T6.

• B2 RESET: The pushbutton connected to NRST is used to RESET the STM32F334C8T6.

4.5 High brightness LED dimming with buck converter

The STM32F334 discovery integrates a high brightness LED dimming feature. This function has been designed with on-chip peripherals MCU to reduce the number of external components generally included in analog components based solutions for LED dimming.

The default LED Voltage supply is 5 Volts from 5V_OUT signal or can be provided by an external voltage through CN4 (Vext signal) and by removing the solder of SB18. This external voltage must be between 5 and 15 Volts.

LED information:

• reference LE-CWC12100-D, 1W, Everluck

• VF = 2.8V Typical

• IF = 350mA Max

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To design a high brightness LED dimming application, refer to the following documentation and firmware:

• For details concerning I/O ports, refer to the STM32F334C8T6 datasheet.

• For information on software development, see DISCOVER application software on www.st.com/stm32f3-discovery.

• For more detail concerning high brightness LED dimming, refer to AN4885 high brightness LED dimming using the STM32F334 discovery kit.

• STM32Cube library available from www.st.com/stm32f3-discovery.

Warning: The high brightness of this LED can be very dangerous for your eyes...

For safety reasons, the maximum high brightness LED forward current has been limited by software to 250 mA and an optical cube-shaped protection has been placed over the LED. Do not override this current limitation and do not remove the optical protection while the LED is operating.

The STM32F334C8T6 MCU controls this high brightness LED dimming feature through the High-Resolution Timers interface.

Note: If LED buck converter is used then buck/boost converter cannot be enabled.

4.6 Buck/boost converter

The STM32F334 discovery includes a buck/boost converter. This DC/DC converter function has been designed with on-chip peripherals MCU and is able to convert an input Voltage (Vin on CN5) from 3 Volts to 15 Volts to an output voltage (Vout on CN7) from 3 Volts to 15 Volts.

Input current on Vin (CN5) or output current on Vout (CN7) are limited to 500 mA max. Whatever the input or output voltage conditions are.

The STM32F334C8T6 MCU controls this Buck / Boost converter feature through the High-Resolution Timers interface.

To design a buck/boost converter application, refer to the following documentation and firmware:

• For details concerning I/O ports, refer to the STM32F334C8T6 datasheet.

• For information on software development, see DISCOVER application software on www.st.com/stm32f3-discovery.

• For more detail concerning the buck/boost converter, refer to AN4449 buck boost converter using the STM32F334 discovery kit.

• STM32Cube library available from www.st.com/stm32f3-discovery.

Note: If buck/boost converter is used then LED buck converter cannot be enabled.

4.7 JP3 (Idd)

Jumper JP3, labeled Idd, allows the consumption of STM32F334C8T6 to be measured by removing the jumper and connecting an ammeter.

• Jumper on: STM32F334C8T6 is powered (default).

• Jumper off: an ammeter must be connected to measure the STM32F334C8T6 current, (if there is no ammeter, the STM32F334C8T6 is not powered).

http://www.st.com/stm32f3-discovery


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4.8 BOOT0 Configuration

BOOT0 is at level “0” through a pull-down R31. If you want to set BOOT0 at level “1”, it can be configured by setting a jumper between P2.6 (BOOT0) and P2.5 (VDD).

This facility is offered for fast and instantaneous configuration.

Note: If you need to set BOOT0 at level "1" continuously, then unsolder the resistor R31 to avoid a consumption of 6 mA while connecting pin P2.6 (BOOT0) and P2.5 (VDD) with a jumper or with a wire.

4.9 USART configuration

The USART2 interface available on PB3 and PB4 of the STM32F334C8T6 can be connected to ST-LINK/V2-1 MCU to use the virtual COM port function.

By default the USART2 communication between the target STM32F334C8T6 and ST-LINK/V2-1 MCU is not enabled.

To use the virtual COM port function with:

• The on-board STM32F334C8T6, then set SB14 and SB16 ON.

• An external MCU then remove solder from SB14 and SB16, solder an 2 pins header on JP4, then you can connect RX and TX of the external MCU directly to RX and TX of JP4.

4.10 OSC clock supply

If PF0 and PF1 are only used as GPIOs instead of as a clock, then SB13 and SB15 are closed and R29 and R30 are removed. (SB12 must be open)

MCO from ST-LINK/V2-1 (from MCO of the STM32F103CBT6) This frequency cannot be changed, it is fixed at 8 MHz and connected to PF0-OSC_IN of the STM32F334C8T6. The configuration needed is:

– SB12 closed and SB13 open

– R30 removed

HSE Oscillator on board from X2 crystal (not provided) For typical frequencies and its capacitors and resistors, please refer to the STM32F334C8T6 Datasheet. The configuration needed is:

– SB12, SB13, SB15 open

– X2, R29, R30, C20, C21 soldered

Oscillator from external PF0 (from external oscillator through pin 7 of the P1 connector) The configuration needed is:

– SB13 closed

– SB12 open

– R30 removed

Note: Please refer to the AN2867 for oscillator design guide for STM32 microcontrollers.

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4.11 Solder bridges

Table 4. Solder bridges

Bridge State(1) Description

SB13, 15 (X2 crystal)OFF X2, C20, C21, R29 and R30 provide a clock. PF0, PF1 are disconnected from P1.

ON PF0, PF1 are connected to P1 Remove only R29 and R30

SB3,5,8,10 (default) ON Reserved, do not modify

SB2,4,7,9 (reserved) OFF Reserved, do not modify

SB20 (B2-RESET)ON B2 Push Button is connected to NRST of STM32F334C8T6

OFF B2 Push Button is not connected to NRST of STM32F334C8T6

SB21 (B1-USER)ON B1 Push Button is connected to PA0

OFF B1 Push Button is not connected to PA0

SB14, 16 (VCP RX, TX)(2)

OFF PA2, PA3 of STM32F103CBT6 are not connected to PB4, PB3 of STM32F334C8T6

ONPA2, PA3 of STM32F103CBT6 are connected to PB4, PB3 of STM32F334C8T6, then SW0 cannot be used and SB17 must be OFF

SB18 (Vext)ON LED Buck is powered from 5V_OUT

OFF LED Buck is powered from CN4

SB22 (L3)ON Default position.

OFF Use CN6 for Current measurement.

SB1 (ST-LINK/V2-1 PWR)

ON ST-LINK/V2-1 module is powered

OFF ST-LINK/V2-1 module is not powered

SB19 (LED)ON Default position.

OFF Use it connecting 2 wires for Current measurement.

SB11 (NRST)ON

T_NRST signal from connector CN2 and STM32F103CBT6, is connected to NRST of STM32F334C8T6

OFF T_NRST signal is not connected

SB17 (SWO)

OFF SWO signal is not connected

ONSWO signal of connector CN3 is connected to PB3, then USART_TX cannot be used and SB16 must be OFF

SB6 (STM_RST)OFF No incidence on NRST signal of STM32F103CBT6

ON NRST signal of STM32F103CBT6 is connected to GND

SB12 (MCO) ONMCO clock signal from STM32F103CBT6 is connected to OSC_IN of STM32F334C8T6.

OFF MCO signal of STM32F103CBT6 is not used.

1. Default value is in bold.

2. Default state is OFF for boards labeled MB1142 B-01 and older.


22/33 DocID025953 Rev 2

4.12 Extension connectors

The male headers P1 and P2 can connect the STM32F334 discovery board to a standard prototyping/wrapping board. STM32F334C8T6 GPI/Os are available on these connectors. P1 and P2 can also be probed by an oscilloscope, logical analyzer or voltmeter.

Table 5. Extension connectors

MCU pin Board funtion

Mai

n f

un

ctio

n

LQ

FP

48 p

in n

um

.

SY

ST

EM

VC

P

Pu

shB

utt

on

s

LE

D

Bu

ck/b

oo

st

Bu

ck L

ED

Fre

e I/

O

Po

wer

Su

pp

ly

P1

P2

CN

5

CN

7

SB

x(1

)

- - - - - - Vin - - - - - 2 - -

- - - - - -

Vo

ut - - - - - - 2 -

BOOT0 44

BO

OT

0

- - - - - - - - 6 - - -

NRST 7

NR

ST

-

RE

SE

T

- - - - - 9 - - -

SB

11, 2

0

PA0 10 - -

US

ER

- - - - - 11 - - -

SB

21

PA1 11 - - - -

Vin

_Sen

se

- - - 12 - - - -PA2 12 - - - - - - - - 13 - - - -

PA3 13 - - - -

Vou

t_S

ense

- - - 14 - - - -

PA4 14 - - - - - -

PA

4 - 15 - - - -

PA5 15 - - - - - -

PA

5 - 16 - - - -

PA6 16 - - - - - -

PA

6 - 17 - - - -

PA7 17 - - - - - -

PA

7 - 18 - - - -

PA8 29 - - - -

P1_

Driv

e

- - - - 19 - - -

DocID025953 Rev 2 23/33


32

PA9 30 - - - -

N1_

Driv

e

- - - - 18 - - -

PA10 31 - - - -

N2_

Driv

e

- - - - 17 - - -

PA11 32 - - - -

P2

_Driv

e

- - - - 16 - - -

PA12 33 - - - - - -

PA

12 - - 15 - - -

PA13 34

SW

DIO

- - - - - - - - 14 - - -

PA14 37

SW

CLK

- - - - - - - - 13 - - -

PA15 38 - - - - - -

PA

15 - - 12 - - -PB0 18 - - - - -

BK

_Sen

se

- - 19 - - - -

PB1 19 - - - - - -

PB

1

- 20 - - - -

PB2 20 - - - - - -

PB

2 - 21 - - - -

PB3 39

SW

O

US

AR

T_T

X

- - - - - - - 11 - -

SB

17,

16

PB4 40 -

US

AR

T_R

X

- - - - - - - 10 - -

SB

14

PB5 41 - - - - - -

PB

5

- - 9 - - -

PB6 42 - - -

RE

D - - - - - 8 - - -

Table 5. Extension connectors (continued)

MCU pin Board funtionM

ain

fu

nct

ion

LQ

FP

48 p

in n

um

.

SY

ST

EM

VC

P

Pu

shB

utt

on

s

LE

D

Bu

ck/b

oo

st

Bu

ck

LE

D

Fre

e I/O

Po

wer

Su

pp

ly

P1

P2

CN

5

CN

7

SB

x(1)


24/33 DocID025953 Rev 2

PB7 43 - - -

BLU

E

- - - - - 7 - - -

PB8 45 - - -

OR

AN

GE

- - - - - 4 - - -

PB9 46 - - -

GR

EE

N

- - - - - 3 - - -

PB10 21 - - - - - -

PB

10 - 22 - - - -

PB11 22 - - - - - -

PB

11 - 23 - - - -

PB12 25 - - - - -

BK

_Driv

e

- - - 23 - - -

PB13 26 - - - - - -

PB

13 - - 22 - - -

PB14 27 - - - - RC - - - - 21 - - -

PB15 28 - - - - - -

PB

15

- - 20 - - -

PC13 2 - - - - - -

PC

13 - 4 - - - -

PC14 3 - - - - - -

PC

14 - 5 - - - -

PC15 4 - - - - - -

PC

15 - 6 - - - -

PF0 5

OS

C_I

N

- - - - - - - 7 - - -

SB

12, 1

3

PF1 6

OS

C_

OU

T

- - - - - - - 8 - - -

SB

15

- - - - - - - - - 3V - 1 - - -

- - - - - - - - -

5V_I

N

1 - - - -



ain

fu

nct

ion

LQ

FP

48 p

in n

um

.

SY

ST

EM

VC

P

Pu

shB

utt

on

s

LE

D

Bu

ck/b

oo

st

Bu

ck

LE

D

Fre

e I/O

Po

wer

Su

pp

ly

P1

P2

CN

5

CN

7

SB

x(1)

DocID025953 Rev 2 25/33


32

- - - - - - - - -

5V_O

UT

3 - - - -

VDD 24 - - - - - - -

VD

D - 5 - - -

VDD 36 - - - - - - -

VD

D - - - - -

VDD 48 - - - - - - -

VD

D - - - - -

VBAT 1 - - - - - - -

VD

D - - - - -

VDDA 9 - - - - - - - - - - - - -

GND 23 - - - - - - -

GN

D2 2 1 1 -

GND 35 - - - - - - -

GN

D

10 - - - -

GND 47 - - - - - - -

GN

D

25 25 - - -

VSSA 8 - - - - - - -

GN

D

- - - - -1. Signals available depending on SBx value. Refer to Table 4: Solder bridges or schematics in Section 6.



ain

fu

nct

ion

LQ

FP

48 p

in n

um

.

SY

ST

EM

VC

P

Pu

shB

utt

on

s

LE

D

Bu

ck/b

oo

st

Bu

ck

LE

D

Fre

e I/O

Po

wer

Su

pp

ly

P1

P2

CN

5

CN

7

SB

x(1)

Mechanical drawing UM1735

26/33 DocID025953 Rev 2

5 Mechanical drawing

Figure 8. STM32F334 discovery board mechanical drawing

DocID025953 Rev 2 27/33

UM1735 Electrical schematics

32

6 Electrical schematics

Figure 9. STM32F334 discovery

15

STM32F3

34 DISCOVER

Y

MB11

42B-01

30-M

ay-14

Title

:

Size:

Reference:

Date:

Sheet:

of

A4

Revision:

STM32F3

348-DISCO

Project:

NRST

MCO

SWDIO

SWCL

K

SWO

USA

RT_

RX

USA

RT_

TX

U_S

T_LINK

ST_L

INK_V

2.SC

HDOC

SWDIO

SWCL

KPA

14PA

13

MCO

NRST

T_NRST

PB8

BOOT0

NRST

PC15

PC14

PF1

PF0

MCO

PC13

PA0

PA1

PA2

PA3

PA4

PA5

PA6

PA7

PA8

PA9

PA10

PA11

PA12

PA13

PA14

PA15

PB0

PB1

PB2

PB3

PB4

PB5

PB6

PB7

PB9

PB10

PB11

PB12

PB13

PB14

PB15

B_U

SER

LD_D

LD_U

LD_L

LD_R RC

Vout_Sense

P2_D

rive

BK_S

ense

Vin_S

ense

BK_D

rive

N1_Driv

e

P1_D

rive

N2_Driv

e

SWCL

KSW

DIO

SWO

USA

RT_

TXUSA

RT_

RX

U_S

TM32Fx

STM32Fx

.SchDoc

MCO

PA0

PA1

PA2

PA3

PA4

PA5

PA6

PA7

PA8

PA9

PA10

PA11

PA12

PA13

PA14

PA15

PB0

PB1

PB2

PB3

PB4

PB5

PB6

PB7

PB8

PB9

PB10

PB11

PB12

PB13

PB14

PB15

PC13

PC14

PC15

PF0

PF1

BOOT0

NRST

Rev A-01 --> PC

B label M

B11

42 A-01

Rev B-01 --> PC

B label M

B11

42 B-01,

M

OSF

ETs replaced by new

family

, several Resistors and

Capacito

rs values.

USA

RT_

TXUSA

RT_

RX

B_U

SER

BK_D

rive

BK_S

ense

LD_D

LD_U

LD_L

LD_R

VDD

3V_O

UT

GND

GND

GND

N1_Driv

eN2_Driv

eVout_Sense

P1_D

rive

P2_D

rive

Vin_S

enseRC

U_B

UCK_B

OOST

BUCK_B

OOST

.SchDoc

NRST

B_U

SER

BK_S

ense

BK_D

rive

LD_D

LD_U

LD_L

LD_R

U_B

UCK_L

EDBUCK_L

ED.SchDoc

SWO

PA0

PA1

PA2

NRST

PC13

PC14

PC15

PF1

PF0

PA4

PA5

PA6

PA7

PB10

PB11

PB1

PB2

PB0

PA3

PB5

PB6

PB7

PB8

PB9

PA15

PB3

PA14

PB4

BOOT0

PA11

PA12

PA9

PA10

PB12

PB13

PB14

PB15

PA13

PA8

B_U

SER

NRST

Vout_Sense

Vin_S

ense

LD_D

LD_U

LD_L

LD_R

RC

P2_D

rive

N1_Driv

eN2_Driv

eP1

_Driv

e

Vout_Sense

Vin_S

ense

RC

P2_D

rive

N1_Driv

eN2_Driv

eP1

_Driv

e

BK_D

rive

BK_S

ense

SWDIO

SWCL

K

PB3

PB4

PB3

SWO

USA

RT_

TXUSA

RT_

RX

5V_IN

5V_O

UT

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

P2 Header 2

5

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

P1 Header 2

5NC

NC

Electrical schematics UM1735

28/33 DocID025953 Rev 2

Figure 10. ST-LINK/V2-1 (SWD only)

25

ST-LIN

K/V2-1 (SWD only)

MB11

42B-01

28-M

ay-14

Title

:

Size:

Reference:

Date:

Sheet:

of

A4

Revision:

STM32F3

348-DISCO

Project:

USB

_DM

USB_D

P

STM

_RST

T_JTCKT_

JTCK

T_JTDOT_JTDI

T_JT

MS

STM

_JTM

S

STM

_JTC

K

OSC_IN

OSC_O

UT

T_NRST

AIN_1

+3V3_ST

_LIN

K

+3V3_ST

_LIN

K

SWIM_IN

SWIM_INSWIM

SWIM_RST_INSWIM_RST

USB

_DM

USB_D

P

USB VCC

1

D-

2

D+

3

ID4

GND

5

SHEL

L6

CN1

USB

-MIN

I-typeB

COM

ST-LIN

K Po

wer

+3V3_ST

_LIN

K

Jumper

s ON --> D

ISCOVERY S

elec

ted

Jumper

s OFF

-->

ST-L

INK S

elec

ted

Boa

rd Id

ent: PC13

=0

T_JT

CK

T_JT

MS

SWD

+3V3_ST

_LIN

K

1234

CN3

SB3

SB2

SB5

SB4

SB8

SB7

SB10

SB9

STM

_JTM

S

STM

_JTC

KSW

CLK

SWDIO

SWD

RESERVED

DEFAULT

+3V3_ST

_LIN

K

T_SW

DIO

_IN

T_SW

OLE

D_S

TLINK

LED_S

TLINK

+3V3_ST

_LIN

K

Red

_Green

21

34

LD2

LD_B

ICOLO

R_C

MS

SWDIO

SWCL

KTC

K/SWCL

KTM

S/SW

DIO

VDD

3V

Not Fitted

MCO

MCO

T_JRST

1 2 3 4 5 6

CN2

Header 6

AIN_1

T_NRST

T_SW

O

NRST

SWO

SB11

SB17

T_NRST

T_SW

O

SB6

RC M

ust b

e very close to

STM

32F103 pin 29

51

2

GND

3

4

BYPA

SSIN

H

Vin

Vou

t

U2

LD39

85M33

R

D1

BAT6

0JFILM

Idd

TX RX

SB14

SB16

USA

RT_

RX

USA

RT_

TX

Close to

JP

Not Fitted

STLINK_TX

STLINK_R

X

Not Fitted

LD1

LED, red

C12

100n

F

C6

100n

F

C16

100n

F

C10

100n

F

C3

1uF

C11

1uF

C8

100n

FC4

100n

FC9

10nF

C13

20pF

C14

20pF

C15

100n

FC40

20pF

12

X1

8MHz

+3V3_ST

_LIN

K

R16

4K7

R17

2K7

USB

_REN

UMn

PWR_EXT

PWR_E

Nn

+3V3_ST

_LIN

K

JP1

3

1

2

T190

13-SOT2

3

R13

10K

R15

36K

U5V

+3V3_ST

_LIN

K

R14

100

USB

_REN

UMn

U5V

PA14

PA13

R65

100

R18

100

R6

1K

R23

10K

R9

1K5

R10

0R8

100K

R11

0

R27

4K7

R28

4K7

R26

100K

R24

10K

R22

100K

R25

[NA]

R3

10K

R4

22R1

[NA]

R12

22R19

22R21

22

R2

0

R7

100

R5

100

PWR_E

Nn

TP2

TP1

U5V

3VEN

1

GND 2

VO

4

NC

5

GND 7

VI

6PG

3U1

LD39050P

U33R

R20

10K

C1

1uF

C2

100n

FC7

1uF

C5

100n

F

+3V3_ST

_LIN

K

5 Vo

lts Outpu

t3 Vo

lts Outpu

t

5 Vo

lts From Externa

l

SB1

5V_IN

5V_O

UT

5V_IN

5 Vo

lts From USB

ST-LINK

3V_O

UT

JP4

JP3

JP2

+3V3_ST

_LIN

K

+3V3_ST

_LIN

K

D2

STPS

1L30A

D3

STPS

1L30A

3

4

5

G

SD

6

21

T2ST

T7P2

UH7

VBAT

1

PA7 17

PC13

2

PA12

33PC

143

PB0 18

PC15

4JTMS/SW

DIO

34

OSC

IN5

PB1 19

OSC

OUT

6

VSS

_235

NRST

7

PB2/BOOT1 20

VSS

A8

VDD_2

36

VDDA

9

PB10 21

PA0

10

JTCK/SWCLK37

PA1

11

PB11 22

PA2

12

PA15/JTDI38

PA3 13

VSS_1 23

PA4 14

PB3/JTDO39

PA5 15

VDD_1 24

PA6 16

PB4/JNTRST40

PB12

25

PB541

PB13

26

PB642

PB14

27

PB743

PB15

28

BOOT044

PA8

29

PB845

PA9

30

PB946

PA10

31

VSS_347

PA11

32

VDD_348

U3

STM32F1

03CBT6

Not Fitted

DocID025953 Rev 2 29/33


32

Figure 11. STM32F334C8T6 MCU

35

STM32F3

348C

T6 M

CU

MB11

42B-01

16-A

pr-14

Title

:

Size:

Reference:

Date:

Sheet:

of

A4

Revision:

STM32F3

348-DISCO

Project:

PB5

PB6

PB7

PA4 PA

5 PA6 PA

7

PA11

PA12

PA9

PA10

PB12

PB13

PB14

PB15

PB10PB

11

PB8

PA0

PB9

PA1

PB1PB

2

PA15

PB3

PB0

PA3

PA13

PA14

PB4

PA2

PA8

BOOT0

MCO

PF1-OSC

_OUT

PA0

NRST

PB0

PC15

PC14

BOOT0

PF1

PF0

Must b

e close to th

e Crysta

l

NRST

MCO

12X2

8MHz

PC13

PF0-OSC

_IN

PA1

PA2

PA3 PA

4 PA5 PA

6 PA7

PA8

PA9

PA10

PA11

PA12

PA13

PA14

PA15

PB1PB

2

PB3

PB4

PB5

PB6

PB7

PB8

PB9

PB10PB

11

PB12

PB13

PB14

PB15

PC13

Not Fitted

R31

510

PA0

B_U

SER

SBx Must b

e very close to

the ST

M32F334

RC

Vout_Sense

P2_D

rive

BK_S

ense

Vin_S

ense

BK_D

rive

B_U

SER

PB6

LD_D

LD_D

LD_U

LD_L

LD_R

LD_U

LD_L

LD_R

VDD

All this block must b

e very close to

the ST

M32F334

VDDA

VBAT

1

PA7 17

PC13

2

PA12

33PC

143

PB0 18

PC15

4PA

1334

PF0/OSC

IN5

PB1 19

PF1/OSC

OUT

6

VSS

_235

NRST

7

PB2 20

VSS

A8

VDD_2

36

VDDA

9

PB10 21

PA0

10

PA1437

PA1

11

PB11 22

PA2

12

PA1538

PA3 13

VSS_1 23

PA4 14

PB339

PA5 15

VDD_1 24

PA6 16

PB440

PB12

25

PB541

PB13

26

PB642

PB14

27

PB743

PB15

28

BOOT044

PA8

29

PB845

PA9

30

PB946

PA10

31

VSS_347

PA11

32

VDD_348

U4

STM32F3

34C8T

6

PC14

PC15

PF1-OSC

_OUT

PF0-OSC

_IN

VDD

VDD

VDD

BOOT0

BK_D

rive

BK_S

ense

PB0

PB12

Vout_Sense

Vin_S

ense

PA1

PA3

RC

P2_D

rive

PA11

PB14

N1_Driv

eN2_Driv

ePA

10PA

9P1

_Driv

ePA

8N1_Driv

eP1

_Driv

e

N2_Driv

e

SWCL

KSW

DIO

SWDIO

SWCL

KPA

14PA

13

C25

100n

FC24

100n

FC17

100n

F

L1 Ferrite

C22

100n

FUSA

RT_

TXUSA

RT_

RX

PB3

PB4

VDDA

PB7

PB8

PB9

VDD

USA

RT_

TXUSA

RT_

RX

SWO

SWO

PB3

C21

20pF

C20

20pF

R29

220

R30

0

SB12

SB13

SB15

C18

1uF

C19

100n

F

Electrical schematics UM1735

30/33 DocID025953 Rev 2

Figure 12. LED buck converter

45

LED BUCK con

verter MB11

42B-01

14-M

ay-14

Title

:

Size:

Reference:

Date:

Sheet:

of

A4

Revision:

STM32F3

348-DISCO

Project:

NRST

NRST R

ESET

Button

VDD R42

[NA]

VDD

B_U

SERU

SER &

WAKE-

UP Button

PA0

BK_S

ense

BK_D

rive

R33

10K

D4

STPS

1L40A

R37

33R

LED B

UCK converter

VEXT

PB12

PB0

With

LPB

1

LEDs

LD_D

LD_D

LD_U

LD_L

LD_R

LD_U

LD_L

LD_R

R36

330

R38

1KR35

1K R40

510

U D

LR

LD6

LED, b

lue

LD3

LED, red

LD5

LED, green

LD4

LED, orange

White

LPB

LPB1

LPB_1

0_10

1 234

B2SW-PUSH-CMS_BLACK

1 234

B1SW-PUSH-CMS_BLUE

SB20

SB21

B_U

SER

C30

100n

F

R43

10K

R41

10K

C31

100n

F

C29

100n

F

C28

47uF

C26

1nFC27

1uF

R34

10

5V_O

UT

CN4

SB18

SB19

P3

Wire

d on

Solder S

ide

P4

R39

1

L2 82μH

10%

3

45

G

SD

6 2 1

T3 STT5

N2V

H5

LD7

LED LE-CWC12100_[D

]_1W

DocID025953 Rev 2 31/33


32

Figure 13. Buck/boost converter

55

BUCK / BO

OST

CONVER

TER

MB11

42B-01

30-M

ay-14

Title

:

Size:

Reference:

Date:

Sheet:

of

A4

Revision:

STM32F3

348-DISCO

Project:

N1_Driv

e

R53

1KR54

1K

R56

10R

R62

10K

R57

10R

R63

10K

N2_Driv

e

R55

270R

R58

270R

P1_D

rive

P2_D

rive

Vout

Vin

Vin_S

ense

CN6

R48

47R

R50

47R

12

D6

SMAJ15A

12

D8

SMAJ15A

PA8

PA9

PA10

PA11

PA1

RC

GND

PB14

Vout_Sense

PA3

R45

6.8K

0.1%

R51

27K 0.1%

BUCK/BOOST C

onverter

CN5

CN7

TP4

TP3

C36

100n

F

C33

100n

F

C34

100n

F

C37

100n

FC35

6.8nF

C38

47uF

SB22

C39

47uF

L3 82μH

10%

2

1

3 T6 BC817

2

1

3

T7 BC817

2

1

3

T9 BC807

2

1

3

T8BC807

R47

10R

1

3

G

SD 2

T10

NDS7

002A

R61

270R

R49

10R

1

3

G

SD

2

T13

NDS7

002A

R59

10K

R60

10K

1

3

G

SD

2

T15

NDS7

002A

1

3

G

SD 2

T14

NDS7

002A

R64

270R

R44

13

4 5

G

S D

621

T4ST

T4P3

LLH6

3

45

G

SD

6 2 1

T12

STT5

N2V

H5

3

45

G

SD

6 2 1T1

1 STT5

N2V

H5

3

4 5

G

S D

621T5

STT4

P3LL

H6

Not Fitted

13

nc 2

D5

BAT5

4FILM

13 nc 2

D7

BAT5

4FILM

C23

10nF

_X7R

_10%

_080

5

R32

15K_1

%_0

805

C32

22nF

_X7R

_10%

_060

3

R46

3K3_

0.1%

_080

5

R52

13K3_

0.1%

_080

5

Not Fitted

RC Low P

ass

Filte

rNot Fitted

Revision history UM1735

32/33 DocID025953 Rev 2

7 Revision history

Table 6. Document revision history

Date Revision Changes

19-Jun-2014 1 Initial release

01-Feb-2016 2

Change of STM32F3x4 to STM32F334 in Introduction. mbed-enabled logo added on the cover page. Added mbed-enabled in Section 3: Features.

Added Section 2.1: Product marking. Text change in Section 2.2: Order code. Remove Windows Vista in Section 4.1.1: Drivers.

SB14 and SB16 default position update in Table 4: Solder bridges

Added Section 4.1.3: VCP configuration

DocID025953 Rev 2 33/33

UM1735

33

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