Figure 1. STM32F072 discovery board - STMicroelectronics · STM32F072 discovery board www ... board connector • Extension header for LQFP64 I/Os for ... on the STM32F072 discovery

June 2014 DocID025474 Rev 2 1/31

UM1690User manual

Discovery kit for STM32 F0 series with STM32F072RB MCU

Introduction

The STM32F072 discovery kit (32F072BDISCOVERY) helps you to discover the full features of the STM32F0 series and to develop your applications. It is based on an STM32F072RBT6 and includes an ST-LINK/V2 embedded debug tool interface, ST MEMS Gyroscope, LEDs, pushbuttons, linear touch sensor, touch keys, RF EEprom connector and a USB mini-B connector.

Figure 1. STM32F072 discovery board

www.st.com

http://www.st.com

Contents UM1690

2/31 DocID025474 Rev 2

Contents

1 Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2 Ordering and product information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4 Hardware layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4.1 Embedded ST-LINK/V2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

4.1.1 Using ST-LINK/V2 to program/debug the STM32F072 on board . . . . . 11

4.1.2 Using ST-LINK/V2 to program/debug an external STM32 application . . 12

4.2 Power supply and power selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.3 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.4 Pushbuttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.5 Linear touch sensor / touch keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.6 USB device support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.7 BOOT0 configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.8 Embedded USB Bootloader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.9 Gyroscope MEMS (ST MEMS L3GD20) . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.10 JP2 (Idd) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.11 Extension and RF EEprom connector . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.12 OSC clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4.12.1 OSC clock supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4.12.2 OSC 32 KHz clock supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4.13 Solder bridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.14 Extension connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5 Mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

6 Electrical schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

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UM1690 List of tables

3

List of tables

Table 1. ON/OFF conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Table 2. Jumper states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Table 3. Debug connector CN2 (SWD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Table 4. Extension and RF EEprom connector (CN3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Table 5. Solder bridges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Table 6. MCU pin description versus board function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Table 7. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

List of figures UM1690

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List of figures

Figure 1. STM32F072 discovery board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Figure 2. Hardware block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Figure 3. Top layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Figure 4. Bottom layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Figure 5. STM32F072 discovery board connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Figure 6. ST-Link connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Figure 7. Extension and RF EEprom connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Figure 8. STM32F072 discovery board mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Figure 9. STM32F072 discovery board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Figure 10. ST-LINK/V2 (SWD only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Figure 11. STM32F072RBT6 MCU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Figure 12. MEMS and USB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Figure 13. Linear sensor and pushbutton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

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UM1690 Conventions

30

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

Ordering and product information UM1690

6/31 DocID025474 Rev 2

2 Ordering and product information

The STM32F072 discovery is a low-cost and easy-to-use development kit to quickly evaluate and start a development with an STM32F0 series microcontroller.

Before installing and using the product, please accept the Evaluation Product License Agreement from www.st.com/stm32f0-discovery.

For more information on the STM32F072 discovery board and for demonstration software, visit www.st.com/stm32f0-discovery.

To order the discovery kit for the STM32 F0 series, use the order code: STM32F072B-DISCO.

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UM1690 Features

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3 Features

The STM32F072 discovery board offers the following features:

• STM32F072RBT6 microcontroller featuring 128 KB of Flash memory, 16 KB of SRAM in an LQFP64 package

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

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

• External application power supply: 3 V and 5 V

• L3GD20, ST MEMS motion sensor, 3-axis digital output gyroscope

• One linear touch sensor or four touch keys

• Six LEDs:

– LD1 (red/green) for USB communication

– LD2 (red) for 3.3 V power on

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

• Two pushbuttons (user and reset)

• USB USER with Mini-B connector

• RF EEprom daughter board connector

• Extension header for LQFP64 I/Os for a quick connection to the prototyping board and easy probing

Hardware layout UM1690

8/31 DocID025474 Rev 2

4 Hardware layout

The STM32F072 discovery board has been designed around the STM32F072RBT6 microcontroller in a 64-pin LQFP package.

Figure 2 illustrates the connections between the STM32F072RBT6 and its peripherals (ST-LINK/V2, ST MEMS gyroscope L3GD20, LEDs, pushbuttons, linear touch sensor, touch keys, RF EEprom connector and a USB mini-B connector).

Figure 3 and Figure 4 help you to locate these features on the STM32F072 discovery board.

Figure 2. Hardware block diagram

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UM1690 Hardware layout

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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

The ST-LINK/V2 programming and debugging tool is integrated on the STM32F072 discovery board. The embedded ST-LINK/V2 can be used in 2 different ways according to the jumper states (see Table 2):

• Program/debug the MCU on board,

• Program/debug an MCU in an external application board using a cable connected to SWD connector CN4.

The embedded ST-LINK/V2 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) which describes in detail all the ST-LINK/V2 features.

4.1.1 Using ST-LINK/V2 to program/debug the STM32F072 on board

To program the STM32F072 on board, simply plug in the two jumpers on CN5, as shown in Figure 5 in red, but do not use the CN4 connector as that could disturb communication with the STM32F072RBT6 of the STM32F072 discovery board.

Figure 5. STM32F072 discovery board connections

Table 2. Jumper states

Jumper state Description

Both CN5 jumpers ON ST-LINK/V2 functions enabled for on board programming (default)

Both CN5 jumpers OFF ST-LINK/V2 functions enabled for application through external CN4 connector (SWD supported)


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

It is very easy to use the ST-LINK/V2 to program the STM32 on an external application. Simply remove the 2 jumpers from CN5 as shown in Figure 6, and connect your application to the CN4 debug connector according to Table 3.

Note: SB10 must be OFF if you use CN4 pin 5 in your external application.

Figure 6. ST-Link connections

Table 3. Debug connector CN2 (SWD)

Pin CN2 Designation

1 VDD_TARGET VDD from application

2 SWCLK SWD clock

3 GND Ground

4 SWDIO SWD data input/output

5 NRST RESET of target MCU

6 SWO Reserved

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4.2 Power supply and power selection

The power supply is provided either by the host PC through the USB ST-LINK or USB USER connector, or by an external 5 V power supply.

The D1 and D2 diodes protect the 5 V and 3 V pins from external power supplies:

• 5 V and 3 V can be used as output power supplies when another application board is connected to pins P1 and P2. In this case, the 5 V and 3 V pins deliver a 5 V or 3 V power supply and the power consumption 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. In this case, the STM32F072 discovery board must be powered by a power supply unit or by an auxiliary equipment complying with standard EN-60950-1: 2006+A11/2009, and must be Safety Extra Low Voltage (SELV) with limited power capability.

4.3 LEDs

• LD1 COM: LD1 default status is red. LD1 turns to green to indicate that communications are in progress between the PC and the ST-LINK/V2.

• LD2 PWR: This red LED indicates that the board is powered.

• User LD3: This orange user LED is connected to the I/O PC8 of the STM32F072RBT6.

• User LD4: This green user LED is connected to the I/O PC9 of the STM32F072RBT6.

• User LD5: This red user LED is connected to the I/O PC6 of the STM32F072RBT6.

• User LD6: This blue user LED is connected to the I/O PC7 of the STM32F072RBT6.

4.4 Pushbuttons

B1 USER: User and Wake-Up button connected to the I/O PA0 of the STM32F072RBT6.

B2 RESET: The pushbutton connected to NRST is used to RESET the STM32F072RBT6.


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4.5 Linear touch sensor / touch keys

To demonstrate touch sensing capabilities, the STM32F072 discovery includes a linear touch sensor which can be used either as a 3-position linear touch sensor or as 4 touch keys. Both functions are illustrated in the demonstration software.

3 pairs of I/O ports are assigned to the linear touch sensor / touch keys. Each pair must belong to the same analog switch group:

• PA2, PA3 (group 1)

• PA6, PA7 (group 2)

• PB0, PB1 (group 3)

To minimize the noise, these pairs are dedicated to the linear touch sensor and the touch keys and are not connected to external headers. To design a touch sensing application, refer to the following documentation and firmware:

• For details concerning I/O ports, refer to the STM32F072RBT6 datasheet.

• For information on software development, see DISCOVER application software on www.st.com/stm32f0-discovery.

• For more detail concerning touch sensing application design and layout, refer to AN2869 -Guidelines for designing touch sensing applications.

• STM32 touch sensing library available from www.st.com/stm32f0-discovery.

4.6 USB device support

The STM32F072RBT6 MCU is also used to drive the second USB mini-B connector (USB USER) which allows the board to be used as a USB Device. The STM32F072 discovery can then act as a USB joystick, mouse, or other similar device. If both USBs are connected, diodes D1 and D2 protect the board and use the power from the USB ST-LINK.

The board can be powered through this USB USER connector, in which case LED2 PWR lights up, LED1 COM blinks and it can run an application in standalone mode.

The STM32F072RBT6 MCU controls the USB USER through PA11 and PA12.

4.7 BOOT0 configuration

BOOT0 is at level “0” through a pull-down R33. 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 R33 to avoid a consumption of 6 mA while connecting pin P2.6 (BOOT0) and P2.5 (VDD) with a jumper or with a wire.

4.8 Embedded USB Bootloader

The STM32F072 line embeds a bootloader allowing to program blanked device or to upgrade the device firmware over the USB without the need of a specific programmer. When using this discovery kit, the STM32F072RBT6 MCU firmware can be thus programmed through the second USB mini-B connector (USER USB).

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To program the microcontroller FLASH using this approach, a jumper must be set between BOOT0 (P2.6) and VDD (P2.5), and a cable connected between the USER USB connector of the board and a PC. On the PC side, it is required to use the Device Firmware Upgrade Utility named "DfuSe". This software (STSW-STM32080) and its associated user manual (UM0412) are available from www.st.com.

Several application notes are also available on that topic.

• AN2606: STM32™ Microcontroller system memory boot mode

• AN3156: USB DFU protocol used in the STM32™ bootloader

Note: ST-LINK utilities must not be used when DFU Utility is running.

4.9 Gyroscope MEMS (ST MEMS L3GD20)

The L3GD20 is an ultra-compact, low-power, three-axis angular rate sensor. It includes a sensing element and an IC interface able to provide the measured angular rate to the external world through the I2C/SPI serial interface.

The L3GD20 has dynamically user-selectable full scales of ± 250 dps/ 500 dps/ ±2000 dps and is capable of measuring rates.

The STM32F072RBT6 MCU controls this motion sensor through the SPI interface.

4.10 JP2 (Idd)

Jumper JP2, labeled Idd, allows the consumption of STM32F072RBT6 to be measured by removing the jumper and connecting an ammeter.

• Jumper on: STM32F072RBT6 is powered (default).

• Jumper off: an ammeter must be connected to measure the STM32F072RBT6 current, (if there is no ammeter, the STM32F072RBT6 is not powered).

4.11 Extension and RF EEprom connector

This connector is able to accept an Extension board or the RF EEprom board ANT7-M24LR-A (see AN2972 for more details).

Figure 7. Extension and RF EEprom connector

http://www.st.com


16/31 DocID025474 Rev 2

Table 4. Extension and RF EEprom connector (CN3)

Pin CN3 Designation

1 I2C SDA Data signal for I2C

2 NC Not Connected

3 I2C SCL Clock signal for I2C

4 EXT_RESET RESET signal for Extension board

5 3V 3 Volts power supply

6 NC Not Connected

7 GND Ground

8 5V 5 Volts power supply

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4.12 OSC clock

By default, the STM32F072RBT6 clock source is the High-speed internal (HSI) RC oscillator. Other clock sources are described hereunder.

4.12.1 OSC clock supply

If PF0 and PF1 are only used as GPIOs instead of as a clock, then SB17 and SB18 are CLOSED and R36 and R37 are removed (SB19 must be OPEN).

• MCO from ST-LINK (from MCO of the STM32F103). This frequency cannot be changed, it is fixed at 8 MHz and connected to PF0-OSC_IN of the STM32F072RBT6. The required configuration is:

– SB19 CLOSED and SB17 OPEN

– R36 removed

• Oscillator onboard (from X3 crystal, not provided). For typical frequencies and its capacitors and resistors, please refer to the STM32F072RBT6 Datasheet. The required configuration is:

– SB17, SB18, SB19 OPEN

– X3, R36, R37, C22, C23 soldered

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

– SB17 CLOSED

– SB19 OPEN

– R36 removed

4.12.2 OSC 32 KHz clock supply

If PC14 and PC15 are only used as GPIOs instead of as a clock, then SB13 and SB14 are CLOSED, and R34 and R35 are removed.

• Oscillator onboard (from X2 Crystal, not provided). The required configuration is:

– SB13, SB14 OPEN

– X2, C19, C20, R21, R34, R35 soldered

• Oscillator from external PC14 (from external oscillator trough the pin 5 of P1 connector). The required configuration is:

– SB14 CLOSED

– R35 removed


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4.13 Solder bridgesTable 5. Solder bridges

Bridge State Description

SB17,18 (X3 crystal)ON

PF0, PF1 are connected to P1 (R36, R37 must not be fitted and SB19 must be OFF).

OFF X3, C22, C23, R36 and R37 provide a clock. PF0, PF1 are disconnected from P1.

SB13,14 (X2 crystal)

ON PC14, PC15 are only connected to P1. Remove only R34, R35

OFFX2, C19, C20, R34 and R35 deliver a 32 KHz clock. PC14, PC15 are not connected to P1.

SB19 (MCO)

OFF MCO signal of STM32F103C8T6 is not used.

ONMCO clock signal from STM32F103C8T6 is connected to OSC_IN of STM32F072RBT6. (SB17 must be OFF).

SB2,4,7,9 (Default) ON Reserved, do not modify.

SB1,3,6,8 (Reserved) OFF Reserved, do not modify.

SB24,25 (GND,VDD) ON Reserved, do not modify.

SB11,12 (RX,TX) OFF Reserved, do not modify

SB27,28,29,30,31,32 (touch sensor)

OFF Reserved to the linear touch sensor. PA2,3,6,7 and PB0,1 are not available.

ON PA2,3,6,7 and PB0,1 are available then remove R38,39,40 and C26,27,28. (the linear touch sensor is not available)

SB20,23 (USB-USER)OFF Reserved to the USB USER CN2. PA11,12 are not available.

ON PA11,12 are available then remove R12,13. (the USB USER CN2)

SB21 (B1-USER)ON B1 pushbutton is connected to PA0.

OFF B1 pushbutton is not connected to PA0.

SB22 (B2-RESET)ON B2 pushbutton is connected to the NRST pin of the STM32F072RBT6 MCU.

OFF B2 pushbutton is not connected the NRST pin of the STM32F072RBT6 MCU.

SB10 (NRST)

ONT_NRST pin of the STM32F103C8T6 (ST-LINK/V2) and CN4.5 are connected to the NRST pin of the STM32F072RBT6 MCU.

OFFT_NRST pin of the STM32F103C8T6 (ST-LINK/V2) and CN4.5 are not connected to the NRST pin of the STM32F072RBT6 MCU.

SB5 (STM_RST)OFF No incidence on STM32F103C8T6 (ST-LINK/V2) NRST signal.

ON STM32F103C8T6 (ST-LINK/V2) NRST signal is connected to GND.

SB15 (VBAT)ON VBAT Power is supplied by VDD

OFF VBAT Power is supplied by P1.3 connector

SB16 (VDDIO2)ON VDDIO2 Power is supplied by VDD

OFF VDDIO2 Power is supplied by P2.18 connector

SB26 (VDDA)ON VDDA Power is supplied by VDD through L1 inductance.

OFF VDDA Power is supplied by P2.19 connector

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4.14 Extension connectors

The male headers P1 and P2 can connect the STM32F072 discovery board to a standard prototyping/wrapping board. STM32F072RBT6 GPI/Os are available on these connectors. P1 and P2 can also be probed by an oscilloscope, logical analyzer or voltmeter.

Table 6. MCU pin description versus board function

MCU pin Board function

Mai

n f

un

ctio

n

LQ

FP

64 p

in n

um

.

Sys

tem

Lin

ear

tou

ch

sen

sor

L3G

D20

EX

T/

RF

-E2P

Pu

shb

utt

on

LE

D

US

B U

SE

R

Fre

e I/

O

Po

wer

su

pp

ly

CN

3

CN

4

P1

P2

SB

x(1

)

BOOT0 60

BO

OT

0

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

NRST 7

NR

ST

- - -

RE

SE

T

- - - - - 5 10 - -

PA0 14 - - - -

US

ER

- - - - - - 15 - -

PA1 15 - - - - - - -

PA

1 - - - 16 - -

PA2 16 -

TS

_G1_

IO3

- - - - - - - - - 17 - SB27

PA3 17 -

TS

_G1_

IO4

- - - - - - - - - 18 - SB28

PA4 20 - - - - - - -

PA

4 - - - 21 - -

PA5 21 - - - - - - -

PA

5 - - - 22 - -

PA6 22 -

TS

_G2_

IO3

- - - - - - - - - 23 - SB29

PA7 23 -

TS

_G2_

IO4

- - - - - - - - - 24 - SB30

PA8 41 - - - - - - -

PA

8 - - - - 25 -

PA9 42 - - - - - - -

PA

9 - - - - 24 -


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PA10 43 - - - - - - -

PA

10 - - - - 23 -

PA11 44 - - - - - -

DM - - - - - 22 SB23

PA12 45 - - - - - - DP - - - - - 21 SB20

PA13 46

SW

DIO

- - - - - - - - - 4 - 20 -

PA14 49

SW

CLK

- - - - - - - - - 2 - 17 -

PA15 50 - - - - - - -

PA

15 - - - - 16 -

PB0 26 -

TS

_G3

_IO

2

- - - - - - - - - 27 - SB31

PB1 27 -

TS

_G

3_I

O3

- - - - - - - - - 28 - SB32

PB2 28 - - - - - - -

PB

2

- - - 29 - -

PB3 55 - - - - - - -

PB

3 - - - - 11 -

PB4 56 - - - - - - -

PB

4 - - - - 10 -

PB5 57 - - - - - - -

PB

5 - - - - 9 -

PB6 58 - - - - - - -

PB

6 - - - - 8 -

PB7 59 - - - - - - -

PB

7 - - - - 7 -

PB8 61 - - - - - - -

PB

8 - - - - 4 -

PB9 62 - - - - - - -

PB

9 - - - - 3 -

PB10 29 - - -

SC

L - - - - - 3 - 30 - -

Table 6. MCU pin description versus board function (continued)


Ma

in f

un

ctio

n

LQ

FP

64 p

in n

um

.

Sy

stem

Lin

ear

to

uch

se

ns

or

L3G

D20

EX

T/ R

F-E

2P

Pu

shb

utt

on

LE

D

US

B U

SE

R

Fre

e I/O

Po

wer

su

pp

ly

CN

3

CN

4

P1

P2

SB

x(1)

DocID025474 Rev 2 21/31


30

PB11 30 - - -

SD

A - - - - - 1 - 31 - -

PB12 33 - - - - - - -

PB

12 - - - 32 - -

PB13 34 - -

SC

L/

SP

C - - - - - - - - - 32 -

PB14 35 - -

SD

O - - - - - - - - - 31 -

PB15 36 - -

SD

A/

SD

I/

- - - - - - - - - 30 -

PC0 8 - -

CS

_I2C

/ S

PI - - - - - - - - 11 - -

PC1 9 - -

INT

1

- - - - - - - - 12 - -

PC2 10 - -

INT

2

- - - - - - - - 13 - -

PC3 11 - - - - - - -

PC

3 - - - 14 - -

PC4 24 - - - - - - -

PC

4 - - - 25 - -PC5 25 - - -

EX

T_R

ES

ET

- - - - - 4 - 26 - -

PC6 37 - - - - -

RE

D - - - - - - 29 -

PC7 38 - - - - -

BLU

E

- - - - - - 28 -

PC8 39 - - - - -

OR

AN

GE

- - - - - - 27 -

PC9 40 - - - - -

GR

EE

N

- - - - - - 26 -

PC10 51 - - - - - - -

PC

10 - - - - 15 -



Ma

in f

un

ctio

n

LQ

FP

64 p

in n

um

.

Sy

stem

Lin

ear

to

uch

se

ns

or

L3G

D20

EX

T/ R

F-E

2P

Pu

shb

utt

on

LE

D

US

B U

SE

R

Fre

e I/O

Po

wer

su

pp

ly

CN

3

CN

4

P1

P2

SB

x(1)


22/31 DocID025474 Rev 2

PC11 52 - - - - - - -

PC

11 - - - 14 -

PC12 53 - - - - - - -

PC

12 - - - 13 -

PC13 2 - - - - - - -

PC

13 - - - 4 - -

PC14 3

OS

C3

2_IN

- - - - - - - - - - 5 - SB14

PC15 4

OS

C3

2_O

UT

- - - - - - - - - - 6 - SB13

PD2 54 - - - - - - -

PD

2 - - - - 12 -

PF0 5

OS

C_I

N

- - - - - - - - - - 7 - SB17

PF1 6

OS

C_

OU

T

- - - - - - - - - - 8 - SB18

VBAT 1 - - - - - - - -

VD

D - - 3 - SB15

VDDA 13 - - - - - - - -

VD

D - - - 19 SB26

VDDIO2 48 - - - - - - - -

VD

D - - - 18 SB16

- - - - - - - - - -

VD

D - - 20 5 -

- - - - - - - - - - 5V 8 - - 1 -

- - - - - - - - - - 3V 5 - 1 - -

- - - - - - - - - -

GN

D

7 3 2 2 -

- - - - - - - - - -

GN

D - - 9 - -



Ma

in f

un

ctio

n

LQ

FP

64 p

in n

um

.

Sy

stem

Lin

ear

to

uch

se

ns

or

L3G

D20

EX

T/ R

F-E

2P

Pu

shb

utt

on

LE

D

US

B U

SE

R

Fre

e I/O

Po

wer

su

pp

ly

CN

3

CN

4

P1

P2

SB

x(1)

DocID025474 Rev 2 23/31


30

- - - - - - - - - -

GN

D - - 19 - -

- - - - - - - - - -

GN

D - - 33 33 -

1. Depending on SBx, connected to STM32F072RBT6 MCU pin or board function. (See Schematics for more detail)



Ma

in f

un

ctio

n

LQ

FP

64 p

in n

um

.

Sy

stem

Lin

ear

to

uch

se

ns

or

L3G

D20

EX

T/ R

F-E

2P

Pu

shb

utt

on

LE

D

US

B U

SE

R

Fre

e I/O

Po

wer

su

pp

ly

CN

3

CN

4

P1

P2

SB

x(1)

Mechanical drawing UM1690

24/31 DocID025474 Rev 2

5 Mechanical drawing

Figure 8. STM32F072 discovery board mechanical drawing

DocID025474 Rev 2 25/31

UM1690 Electrical schematics

30

6 Electrical schematics

Figure 9. STM32F072 discovery board

11

22

33

44

DD

CC

BB

AA

STMicroelec

tron

ics

Title

:

Num

ber:

Rev:

Sheet o

fC.1(P

CB.SCH)

Date:10

/28/20

13MB10

761

5

STM32

F072

B-D

ISCO

PA13

PA14

NRST

MCO

PA10

PA9

U_S

T_LINK

ST_L

INK_V

2.SC

HDOC

PA13

PA14

TCK/SWCLK

TMS/SW

DIO

MCO

NRST

T_NRST

LD_D

LD_U

LD_L

LD_R

EXT_

RES

ETMEM

S_IN

T1NCS_

MEM

S_SP

I

MEM

S_IN

T2

SPI2_S

CK

SPI2_M

ISO

SPI2_M

OSI

USB

F4_D

MUSB

F4_D

PI2C2_

SCL

I2C2_

SDA

U_M

EMS_

USB

MEM

S_USB

.SchDoc

PB8

PC5

PC4

PD2

BOOT0

NRST

PC15

PC14

PF1

PF0

MCO

VSS

3

PC0

PC1

PC2

PC3

PC6

PC7

PC8

PC9

PC10

PC11

PC12

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

EXT_

RES

ET

I2C2_

SCL

I2C2_

SDA

TS_G

1_IO

3TS

_G1_

IO4

TS_G

2_IO

3TS

_G2_

IO4

TS_G

3_IO

2TS

_G3_

IO3

VDD3

B_U

SER

USB

F4_D

MUSB

F4_D

P

LD_D

LD_U

LD_L

LD_R

SPI2_S

CK

SPI2_M

ISO

SPI2_M

OSI

MEM

S_IN

T1NCS_

MEM

S_SP

I

MEM

S_IN

T2

U_S

TM32Fx

STM32

Fx.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

PC0

PC1

PC2

PC3

PC4

PC5

PC6

PC7

PC8

PC9

PC10

PC11

PC12

PC13

PC14

PC15

PF0

PF1

BOOT0

NRST

PD2

Rev A.0 --> PC

B label M

B10

76 A-00

Rev B.1 --> PC

B label M

B10

76 B-01, Silk

screen m

odificatio

n and values of R

29,30,31

,32.

Rev C.1 --> PC

B label M

B10

76 C-01, Replace STM

32F0

52 by ST

M32F0

72 on Silkscreen

STM32

F0_U

SART1

_TX

STM32

F0_U

SART1

_RX

PA9

VSS

3

PA10

NRST

NRST

TS_G

1_IO

3TS

_G1_

IO4

TS_G

2_IO

3TS

_G2_

IO4

TS_G

3_IO

2TS

_G3_

IO3

B_U

SER

U_S

ENSO

R_P

BSE

NSO

R_P

B.SchDoc

B_U

SER

TS_G

3_IO

2TS

_G3_

IO3

TS_G

1_IO

3TS

_G1_

IO4

TS_G

2_IO

3TS

_G2_

IO4

TS_G

3_IO

2TS

_G3_

IO3

TS_G

1_IO

3TS

_G1_

IO4

TS_G

2_IO

3TS

_G2_

IO4

USB

F4_D

MUSB

F4_D

P

EXT_

RES

ETI2C2_

SDA

I2C2_

SCL

B_U

SER

SPI2_S

CK

MEM

S_IN

T1NCS_

MEM

S_SP

I

SPI2_M

ISO

SPI2_M

OSI

MEM

S_IN

T2

LD_D

LD_U

LD_L

LD_R

USB

F4_D

MUSB

F4_D

P

SPI2_S

CK

MEM

S_IN

T1NCS_

MEM

S_SP

I

SPI2_M

ISO

SPI2_M

OSI

MEM

S_IN

T2

EXT_

RES

ETI2C2_

SDA

I2C2_

SCL

LD_D

LD_U

LD_L

LD_R

VDD3

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

P1 Header 3

3

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

P2 Header 3

3

BOOT0

PA8

PA9

PB3

PB4

PB5

PB6

PB7

PB8

PB9

PB13

PB14

PB15

PC6

PC7

PC8

PC9

PC10

PC11

PC12

PD2

PA10

5V

VDD

PA11

PA12

PA13

PA14

PA15

NRST

PA1

PA2

PA3

PA4

PA5

PA6

PA7

PA0

PB1

PB2

PB10

PB11

PB12

PB0

PC1

PC2

PC3

PC4

PC5

PC0

3V

VSS

3

PC15

PC14

PC13

VDD3

PF0

PF1

VBAT

VDD_U

SBVDDA

VDDIO

2

VDD

VDD

GND

GND

GND

GND

GND

Electrical schematics UM1690

26/31 DocID025474 Rev 2

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

11

22

33

44

DD

CC

BB

AA

STMicroelec

tron

ics

Title

:

Num

ber:

Rev:

Sheet o

fC.1(P

CB.SCH)

Date:10

/22/20

13

12

X1

8MHz

3V

USB

_DM

USB

_DP

STM_R

ST

T_JTCKT_

JTCK

T_JTDOT_JTDI

T_JT

MS

STM_J

TMS

STM_JTCK

OSC

_IN

OSC

_OUT

T_NRST

AIN_1

3V

3V

3V

SWIM_IN

SWIM_IN

SWIM_IN

SWIM

SWIM

SWIM_RST_INSWIM_RST

MB10

762

5

STM32

F072

B-D

ISCO ST-LINK/V2 (S

WD only)

USB

ST-LINK

U5V

COM

5VU5V

3V

PWR

5V

3V

Jumper

s ON --> D

ISCOVERY S

elec

ted

Jumper

s OFF

-->

ST-L

INK S

elec

ted

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

U2

STM32

F103

C8T

6

Boa

rd Id

ent: PC13

=0

T_JT

CK

T_JT

MS

SWD

3V

1234

CN5

SB2

SB1

SB4

SB3

SB7

SB6

SB9

SB8

STM_J

TMS

STM_J

TCK

SWCLK

SWDIO

SWD

RESERVED

DEFAULT

3V

T_SWDIO

_IN

LED_S

TLINK

LED_S

TLINK

3V

PA13

PA14

TCK/SWCLK

TMS/SW

DIO

VDD

3V

Not Fitted

MCO

C4

1μF_

X5R

_060

3

C1

10nF

_X7R

_060

3

C6

1μF_

X5R

_060

3

MCO

T_JRST

1 2 3 4 5 6

CN4

Header 6

AIN_1

T_NRST

T_SWO

NRST

SB10

T_NRST

SB5

RC M

ust b

e very close to

STM

32F103 pin 29

JP2

51

2

GND

3

4

BYPA

SSIN

H

Vin

Vou

t

U1

LD39

85M33

R

D1

BAT6

0JFILM

D3

BAT6

0JFILM

D4

BAT6

0JFILM

Idd

EXT_

5V, Inp

ut or O

utpu

t

JP1

TX RX

STLINK_R

X

Not Fitted

SB11

SB12

PA10

PA9

STM32

F0_U

SART1

_TX

STM32

F0_U

SART1

_RX

Close to

JP

Not Fitted

STLINK_TX

USB

_DM

USB

_DP

VCC

1

D-

2

D+

3

ID4

GND

5

SHEL

L6

CN1

USB

-MIN

I-typeB

T_SWO

EXT_

3V, Inp

ut or O

utpu

t

Red

_Green

21

34

LD1

LD_B

ICOLO

R_C

MS

R8

1K5

R10

0R9

0R7

100K

R3

1K

R6

100

R5

100

R4

0

R15

[NA]

R20

22

R21

22

R24

22

R28

22

R44

100

R14

100

R18

10K

R23

[NA]

R25

100K

R19

100K

R22

10K

R26

4K7

R27

4K7

C12

100n

FC7

100n

FC8

100n

FC5

100n

F

C32

20pF

C9

20pF

C10

20pF C11

100n

F

C3

100n

FC2

100n

F

3

1

2

T1

9013

-SOT2

3

R16

10K

R17

36K

U5V

3V

LD2

LED, red

DocID025474 Rev 2 27/31


30

Figure 11. STM32F072RBT6 MCU

11

22

33

44

DD

CC

BB

AA

STMicroelec

tron

ics

Title

:

Num

ber:

Rev:

Sheet o

fC.1(P

CB.SCH)

Date:10

/28/20

13

C23

20pF

C22

20pF

C20

6.8p

F

C19

6.8p

F

MB10

763

5

STM32

F072

B-D

ISCO - ST

M32

F072

BCT6

MCU

PB5

PB6

PB7

PA4

PA5

PA6

PA7

PA11

PA12

PA9

PA10

PB12

PB13

PB14

PB15

PB10

PB11

PB8

PA0

PB9

PA1

PB1

PB2

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 Crystal

SB18

SB17

NRST

MCO

12

X3

8MHz

Not Fitted

PC0

PC0

PC1

PC2

PC3

PC4

PC5

PC6

PC7

PC8

PC9

PC10

PC11

PC12

PC13

PD2

PC14

-OSC

32_IN

PC15

-OSC

32_O

UT

SB13

SB14

PC14

-OSC

32_IN

PC15

-OSC

32_O

UT

SB19

PF0-OSC

_IN

R36

0

R37

220

R35

0

R34

0PF

1-OSC

_OUT

PF0-OSC

_IN

VSS

3VSS

3

PA1

PA2

PA3

PA4

PA5

PA6

PA7

PA8

PA9

PA10

PA11

PA12

PA13

PA14

PA15

PB1

PB2

PB3

PB4

PB5

PB6

PB7

PB8

PB9

PB10

PB11

PB12

PB13

PB14

PB15

PD2

PC1

PC2

PC3

PC4

PC5

PC6

PC7

PC8

PC9

PC10

PC11

PC12

PC13

Not Fitted

VDD3

VDD3

C33

100n

FVDD

R33

510

PB10

EXT_

RES

ETPC

5EX

T_RES

ET

PC1

PB13

I2C2_

SDA

I2C2_

SCL

I2C2_

SCL

I2C2_

SDA

PB11

PA0

TS_G

3_IO

2TS

_G3_

IO3

B_U

SER

TS_G

3_IO

2

TS_G

2_IO

3TS

_G2_

IO4

TS_G

1_IO

3TS

_G1_

IO4

TS_G

3_IO

3

TS_G

1_IO

3TS

_G1_

IO4

TS_G

2_IO

3TS

_G2_

IO4

SB27

SB28

Must b

e close to th

e Crystal

SB29

SB30

SB31

SB32

SBx Must b

e very close to

the ST

M32F072

MEM

S_IN

T1

SPI2_S

CK

MEM

S_IN

T1

NCS_

MEM

S_SP

INCS_

MEM

S_SP

IMEM

S_IN

T2

SPI2_S

CK

SPI2_M

ISO

SPI2_M

OSI

SPI2_M

ISO

SPI2_M

OSI

MEM

S_IN

T2

B_U

SER

TS_G

3_IO

2TS

_G3_

IO3

TS_G

1_IO

3TS

_G1_

IO4

TS_G

2_IO

3TS

_G2_

IO4

PB14

PB15

PC2

PC0

USB

F4_D

MUSB

F4_D

P

USB

F4_D

MUSB

F4_D

P

USB

F4_D

MUSB

F4_D

PSB

23SB

20Must b

e very close to

the ST

M32F0

72

PC6

PC7

PC8

PC9

LD_D

LD_D

LD_U

LD_L

LD_R

LD_U

LD_L

LD_R

C18

100n

FC29

100n

FC16

1uF

C24

100n

F

L1 fcm16

08-060

3C25

1uF

VDD

C21

100n

F

C17

100n

F

All this block m

ust b

e very close to

the ST

M32F072 SB16

SB26

SB15

VDD_U

SB

VDDA

VBAT

SB24

SB25

41

32X2

MC30

6-G-06Q

-32.76

8

VDDIO

2

PF0-OSC

_IN

5

PF1-OSC

_OUT

6

NRST

7

PA0/WKUP1

14

PA1

15

PA2

16

PA3

17

PA4

20

PA5

21

PA6

22

PA7

23

PB0

26

PB1

27

PB2

28

PB10

29

PB11

30

PB12

33

PB13

34

PB14

35

PB15

36

PA8

41

PA9

42

PA10

43

PA11

44

PA12

45

PA13

46

PA14

49

PA15

50

PB3

55

PB4

56

PB5

57

PB6

58

PB7

59

BOOT0

60

PB8

61

PB9

62

PC13

2PC

14-O

SC32

_IN

3PC

15-O

SC32

_OUT

4

PC0

8PC

19

PC2

10PC

311

PC4

24PC

525

PC6

37PC

738

PC8

39PC

940

PC10

51PC

1152

PC12

53

PD2

54

VSS

_318

VDD_3

19

U4A

STM32

F072

RBT6

VSS

A12

VDDA

13

VSS

_231

VSS

_USB

47

VSS

_463

VBAT

1

VDD_2

32

VDD_U

SB48

VDD_4

64

U4B

STM32

F072

RBT6

Electrical schematics UM1690

28/31 DocID025474 Rev 2

Figure 12. MEMS and USB

11

22

33

44

DD

CC

BB

AA

STMicroelec

tron

ics

Title

:

Num

ber:

Rev:

Sheet o

fC.1(P

CB.SCH)

Date:10

/28/20

13MB10

764

5

STM32

F072

B-D

ISCO M

EMS an

d USB

LEDs

LD_D

LD_D

LD_U

LD_L

LD_R

USB

F4_D

MUSB

F4_D

P

USB

Use

r

LD_U

LD_L

LD_R

5V

USB

F4_D

MUSB

F4_D

PR13

0R12

0R11

100K

D2

BAT6

0JFILM

MEM

S

MEM

S_IN

T1

3V

SPI2_S

CK

MEM

S_IN

T1

NCS_

MEM

S_SP

INCS_

MEM

S_SP

I

VDD_IO

1

GND

13C1

14

GND

8GND

9

VDD

16

CS_

I2C/SPI

5

INT1

7DRDY/IN

T26

GND

10GND

11

SA0/SD

O4

SDA/SDI/S

DO

3SC

L/SP

C2

VDD

15

GND

12

U3

L3GD20

C14

10uF

C13

10nF

/25V

MEM

S_IN

T2

SPI2_S

CK

SPI2_M

ISO

SPI2_M

OSI

SPI2_M

ISO

SPI2_M

OSI

MEM

S_IN

T2

C15

100n

F

12

34

56

78

CN3

SSM-104

-L-D

H

3V

Exten

sion

/ RF EEprom

Con

nector

5VEXT_

RES

ETI2C2_

SDA

I2C2_

SCL

EXT_

RES

ETI2C2_

SCL

I2C2_

SDA

R30

330

R32

1KR29

1K R31

510

U D

LR

R1

4K7

R2

4K7

3VVCC

1

D-

2

D+

3

ID4

GND

5

SHEL

L6

CN2

USB

-MIN

I-typeB

TP1

TP2

Test Point w

ith hole

LD6

LED, b

lue

LD3

LED, red

LD5

LED, green

LD4

LED, o

range

DocID025474 Rev 2 29/31


30

Figure 13. Linear sensor and pushbutton

11

22

33

44

DD

CC

BB

AA

STMicroelec

tron

ics

Title

:

Num

ber:

Rev:

Sheet o

fC.1(P

CB.SCH)

Date:10

/22/20

13MB10

765

5

STM32

F072

B-D

ISCO Linea

r Sen

sor a

nd Pus

h Button

LS_P1

Line

ar sen

sor m

ade of 3 electro

des

TS_G

3_IO

2

TS_G

1_IO

3

TS_G

2_IO

3

NRST

NRST R

ESET

Button

VDD 1 2

34

B2SW-PUSH-CMS

SB22

R43

[NA]

C31

100n

F

R40

10K

R39

10K

R38

10K

TS_G

1_IO

4

TS_G

2_IO

4

TS_G

3_IO

3

PB0

PA2

PA3

PA6

PA7

PB1

1 1

2 2

3 3

LS1

Linear Sensor

LS_P2

LS_P3

VDD 1 2

34

B1SW-PUSH-CMS

SB21

B_U

SER

USE

R &

WAKE-

UP Button

R42

10K

R41

10K

C30

100n

F

PA0

C26

47nF

C27

47nF

C28

47nF

Revision history UM1690

30/31 DocID025474 Rev 2

7 Revision history

Table 7. Document revision history

Date Revision Changes

18-Dec-2013 1 Initial release.

23-June-2014 2

Updated Figure 1: STM32F072 discovery board.

Added Section 4.7 and Section 4.8.

Added Figure 12: MEMS and USB and Figure 13: Linear sensor and pushbutton.

DocID025474 Rev 2 31/31

UM1690

31

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Figure 1. STM32F072 discovery board - STMicroelectronics · STM32F072 discovery board www ... board connector • Extension header for LQFP64 I/Os for ... on the STM32F072 discovery