Discovery Kit For STM32 F0 Series With STM32F072RB MCU STM32F07BDiscovery User Manual

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June 2014 DocID025474 Rev 2 1/31
UM1690
User 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
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
DocID025474 Rev 2 3/31
UM1690 List of tables
3
List of tables
Table 1. ON/OFF conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Table 2. Jumper states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Table 3. Debug connector CN2 (SWD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 4. Extension and RF EEprom connector (CN3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 5. Solder bridges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 6. MCU pin description versus board function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 7. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
List of figures UM1690
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List of figures
Figure 1. STM32F072 discovery board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2. Hardware block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 3. Top layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 4. Bottom layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 5. STM32F072 discovery board connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 6. ST-Link connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 7. Extension and RF EEprom connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 8. STM32F072 discovery board mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 9. STM32F072 discovery board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 10. ST-LINK/V2 (SWD only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 11. STM32F072RBT6 MCU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 12. MEMS and USB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 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
30
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
30
Figure 3. Top layout
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Hardware layout UM1690
10/31 DocID025474 Rev 2
Figure 4. Bottom layout
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UM1690 Hardware layout
30
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)
Hardware layout UM1690
12/31 DocID025474 Rev 2
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.
Hardware layout UM1690
14/31 DocID025474 Rev 2
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
Hardware layout UM1690
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
Hardware layout UM1690
18/31 DocID025474 Rev 2
4.13 Solder bridges
Table 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
OFF X2, 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.
ON MCO 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)
ON T_NRST pin of the STM32F103C8T6 (ST-LINK/V2) and CN4.5 are connected to
the NRST pin of the STM32F072RBT6 MCU.
OFF T_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
DocID025474 Rev 2 19/31
UM1690 Hardware layout
30
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
Main function
LQFP64 pin num.
System
Linear touch sensor
L3GD20
EXT/ RF-E2P
Pushbutton
LED
USB USER
Free I/O
Power supply
CN3
CN4
P1
P2
SBx(1)
BOOT0 60
BOOT0
-
-
-
-
-
-
-
-
-
-
-
6
-
NRST 7
NRST
-
-
-
RESET
-
-
-
-
-
510
-
-
PA0 14
-
-
-
-
USER
-
-
-
-
-
-
15
-
-
PA1 15
-
-
-
-
-
-
-
PA1
-
-
-
16
-
-
PA2 16
-
TS_G1_IO3
-
-
-
-
-
-
-
-
-
17
-
SB27
PA3 17
-
TS_G1_IO4
-
-
-
-
-
-
-
-
-
18
-
SB28
PA4 20
-
-
-
-
-
-
-
PA4
-
-
-
21
-
-
PA5 21
-
-
-
-
-
-
-
PA5
-
-
-
22
-
-
PA6 22
-
TS_G2_IO3
-
-
-
-
-
-
-
-
-
23
-
SB29
PA7 23
-
TS_G2_IO4
-
-
-
-
-
-
-
-
-
24
-
SB30
PA8 41
-
-
-
-
-
-
-
PA8
-
-
-
-
25
-
PA9 42
-
-
-
-
-
-
-
PA9
-
-
-
-
24
-
Hardware layout UM1690
20/31 DocID025474 Rev 2
PA10 43
-
-
-
-
-
-
-
PA10
-
-
-
-
23
-
PA11 44
-
-
-
-
-
-
DM
-
-
-
-
-
22 SB23
PA12 45
-
-
-
-
-
-
DP
-
-
-
-
-
21 SB20
PA13 46
SWDIO
-
-
-
-
-
-
-
-
-
4
-
20
-
PA14 49
SWCLK
-
-
-
-
-
-
-
-
-
2
-
17
-
PA15 50
-
-
-
-
-
-
-
PA15
-
-
-
-
16
-
PB0 26
-
TS_G3_IO2
-
-
-
-
-
-
-
-
-
27
-
SB31
PB1 27
-
TS_G3_IO3
-
-
-
-
-
-
-
-
-
28
-
SB32
PB2 28
-
-
-
-
-
-
-
PB2
-
-
-
29
-
-
PB3 55
-
-
-
-
-
-
-
PB3
-
-
-
-
11
-
PB4 56
-
-
-
-
-
-
-
PB4
-
-
-
-
10
-
PB5 57
-
-
-
-
-
-
-
PB5
-
-
-
-
9
-
PB6 58
-
-
-
-
-
-
-
PB6
-
-
-
-
8
-
PB7 59
-
-
-
-
-
-
-
PB7
-
-
-
-
7
-
PB8 61
-
-
-
-
-
-
-
PB8
-
-
-
-
4
-
PB9 62
-
-
-
-
-
-
-
PB9
-
-
-
-
3
-
PB10 29
-
-
-
SCL
-
-
-
-
-
3
-
30
-
-
Table 6. MCU pin description versus board function (continued)
MCU pin Board function
Main function
LQFP64 pin num.
System
Linear touch sensor
L3GD20
EXT/ RF-E2P
Pushbutton
LED
USB USER
Free I/O
Power supply
CN3
CN4
P1
P2
SBx(1)
DocID025474 Rev 2 21/31
UM1690 Hardware layout
30
PB11 30
-
-
-
SDA
-
-
-
-
-
1
-
31
-
-
PB12 33
-
-
-
-
-
-
-
PB12
-
-
-
32
-
-
PB13 34
-
-
SCL/
SPC
-
-
-
-
-
-
-
-
-
32
-
PB14 35
-
-
SDO
-
-
-
-
-
-
-
-
-
31
-
PB15 36
-
-
SDA/
SDI/
-
-
-
-
-
-
-
-
-
30
-
PC0 8
-
-
CS_I2C/
SPI
-
-
-
-
-
-
-
-
11
-
-
PC1 9
-
-
INT1
-
-
-
-
-
-
-
-
12
-
-
PC2 10
-
-
INT2
-
-
-
-
-
-
-
-
13
-
-
PC3 11
-
-
-
-
-
-
-
PC3
-
-
-
14
-
-
PC4 24
-
-
-
-
-
-
-
PC4
-
-
-
25
-
-
PC5 25
-
-
-
EXT_RESET
-
-
-
-
-
4
-
26
-
-
PC6 37
-
-
-
-
-
RED
-
-
-
-
-
-
29
-
PC7 38
-
-
-
-
-
BLUE
-
-
-
-
-
-
28
-
PC8 39
-
-
-
-
-
ORANGE
-
-
-
-
-
-
27
-
PC9 40
-
-
-
-
-
GREEN
-
-
-
-
-
-
26
-
PC10 51
-
-
-
-
-
-
-
PC10
-
-
-
-
15
-
Table 6. MCU pin description versus board function (continued)
MCU pin Board function
Main function
LQFP64 pin num.
System
Linear touch sensor
L3GD20
EXT/ RF-E2P
Pushbutton
LED
USB USER
Free I/O
Power supply
CN3
CN4
P1
P2
SBx(1)
Hardware layout UM1690
22/31 DocID025474 Rev 2
PC11 52
-
-
-
-
-
-
-
PC11
-
-
-
14
-
PC12 53
-
-
-
-
-
-
-
PC12
-
-
-
13
-
PC13 2
-
-
-
-
-
-
-
PC13
-
-
-
4
-
-
PC14 3
OSC32_IN
-
-
-
-
-
-
-
-
-
-
5
-
SB14
PC15 4
OSC32_OUT
-
-
-
-
-
-
-
-
-
-
6
-
SB13
PD2 54
-
-
-
-
-
-
-
PD2
-
-
-
-
12
-
PF0 5
OSC_IN
-
-
-
-
-
-
-
-
-
-
7
-
SB17
PF1 6
OSC_OUT
-
-
-
-
-
-
-
-
-
-
8
-
SB18
VBAT 1
-
-
-
-
-
-
-
-
VDD
-
-
3
-
SB15
VDDA 13
-
-
-
-
-
-
-
-
VDD
-
-
-
19 SB26
VDDIO2 48
-
-
-
-
-
-
-
-
VDD
-
-
-
18 SB16
-
-
-
-
-
-
-
-
-
-
VDD
-
-
20 5
-
-
-
-
-
-
-
-
-
-
-
5V
8
-
-
1
-
-
-
-
-
-
-
-
-
-
-
3V
5
-
1
-
-
-
-
-
-
-
-
-
-
-
-
GND
7322
-
-
-
-
-
-
-
-
-
-
-
GND
-
-
9
-
-
Table 6. MCU pin description versus board function (continued)
MCU pin Board function
Main function
LQFP64 pin num.
System
Linear touch sensor
L3GD20
EXT/ RF-E2P
Pushbutton
LED
USB USER
Free I/O
Power supply
CN3
CN4
P1
P2
SBx(1)
DocID025474 Rev 2 23/31
UM1690 Hardware layout
30
-
-
-
-
-
-
-
-
-
-
GND
-
-
19
-
-
-
-
-
-
-
-
-
-
-
-
GND
-
-
33 33
-
1. Depending on SBx, connected to STM32F072RBT6 MCU pin or board function. (See Schematics for more
detail)
Table 6. MCU pin description versus board function (continued)
MCU pin Board function
Main function
LQFP64 pin num.
System
Linear touch sensor
L3GD20
EXT/ RF-E2P
Pushbutton
LED
USB USER
Free I/O
Power supply
CN3
CN4
P1
P2
SBx(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
1
1
2
2
3
3
4
4
D D
C C
B B
A A
STMicroelectronics
Title:
Number: Rev: Sheet of
C.1(PCB.SCH) Date:10/28/2013
MB1076 1 5
STM32F072B-DISCO
PA13
PA14
NRST
MCO
PA10
PA9
U_ST_LINK
ST_LINK_V2.SCHDOC
PA13
PA14 TCK/SWCLK
TMS/SWDIO
MCO
NRST T_NRST
LD_D
LD_U
LD_L
LD_R
EXT_RESET
MEMS_INT1
NCS_MEMS_SPI
MEMS_INT2
SPI2_SCK
SPI2_MISO
SPI2_MOSI
USBF4_DM
USBF4_DP
I2C2_SCL
I2C2_SDA
U_MEMS_USB
MEMS_USB.SchDoc
PB8
PC5
PC4
PD2
BOOT0
NRST
PC15
PC14
PF1
PF0
MCO
VSS3
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_RESET
I2C2_SCL
I2C2_SDA
TS_G1_IO3
TS_G1_IO4
TS_G2_IO3
TS_G2_IO4
TS_G3_IO2
TS_G3_IO3
VDD3
B_USER
USBF4_DM
USBF4_DP
LD_D
LD_U
LD_L
LD_R
SPI2_SCK
SPI2_MISO
SPI2_MOSI
MEMS_INT1
NCS_MEMS_SPI
MEMS_INT2
U_STM32Fx
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
PC0
PC1
PC2
PC3
PC4
PC5
PC6
PC7
PC8
PC9
PC10
PC11
PC12
PC13
PC14
PC15
PF0
PF1
BOOT0
NRST
PD2
Rev A.0 --> PCB label MB1076 A-00
Rev B.1 --> PCB label MB1076 B-01, Silkscreen modification and values of R29,30,31,32.
Rev C.1 --> PCB label MB1076 C-01, Replace STM32F052 by STM32F072 on Silkscreen
STM32F0_USART1_TX
STM32F0_USART1_RX
PA9
VSS3
PA10
NRST NRST
TS_G1_IO3
TS_G1_IO4
TS_G2_IO3
TS_G2_IO4
TS_G3_IO2
TS_G3_IO3
B_USER
U_SENSOR_PB
SENSOR_PB.SchDoc
B_USER
TS_G3_IO2
TS_G3_IO3
TS_G1_IO3
TS_G1_IO4
TS_G2_IO3
TS_G2_IO4
TS_G3_IO2
TS_G3_IO3
TS_G1_IO3
TS_G1_IO4
TS_G2_IO3
TS_G2_IO4
USBF4_DM
USBF4_DP
EXT_RESET
I2C2_SDA
I2C2_SCL
B_USER
SPI2_SCK
MEMS_INT1
NCS_MEMS_SPI
SPI2_MISO
SPI2_MOSI
MEMS_INT2
LD_D
LD_U
LD_L
LD_R
USBF4_DM
USBF4_DP
SPI2_SCK
MEMS_INT1
NCS_MEMS_SPI
SPI2_MISO
SPI2_MOSI
MEMS_INT2
EXT_RESET
I2C2_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 33
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 33
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
VSS3
PC15
PC14
PC13
VDD3
PF0
PF1
VBAT
VDD_USB
VDDA
VDDIO2
VDD
VDD
GND
GND
GND
GND
GND
Electrical schematics UM1690
26/31 DocID025474 Rev 2
Figure 10. ST-LINK/V2 (SWD only)
1
1
2
2
3
3
4
4
D D
C C
B B
A A
STMicroelectronics
Title:
Number: Rev: Sheet of
C.1(PCB.SCH) Date:10/22/2013
1 2
X1
8MHz
3V
USB_DM
USB_DP
STM_RST
T_JTCK
T_JTCK
T_JTDO
T_JTDI
T_JTMS
STM_JTMS
STM_JTCK
OSC_IN
OSC_OUT
T_NRST
AIN_1
3V
3V
3V
SWIM_IN
SWIM_IN
SWIM_IN
SWIM
SWIM
SWIM_RST_IN
SWIM_RST
MB1076 2 5
STM32F072B-DISCO ST-LINK/V2 (SWD only)
USB ST-LINK
U5V
COM
5VU5V
3V
PWR
5V
3V
Jumpers ON --> DISCOVERY Selected
Jumpers OFF --> ST-LINK Selected
VBAT
1
PA7
17
PC13
2
PA12 33
PC14
3
PB0
18
PC15
4JTMS/SWDIO 34
OSCIN
5
PB1
19
OSCOUT
6
VSS_2 35
NRST
7
PB2/BOOT1
20
VSSA
8
VDD_2 36
VDDA
9
PB10
21
PA0
10
JTCK/SWCLK 37
PA1
11
PB11
22
PA2
12
PA15/JTDI 38
PA3
13
VSS_1
23
PA4
14
PB3/JTDO 39
PA5
15
VDD_1
24
PA6
16
PB4/JNTRST 40
PB12 25
PB5 41
PB13 26
PB6 42
PB14 27
PB7 43
PB15 28
BOOT0 44
PA8 29
PB8 45
PA9 30
PB9 46
PA10 31
VSS_3 47
PA11 32
VDD_3 48
U2
STM32F103C8T6
Board Ident: PC13=0
T_JTCK
T_JTMS
SWD
3V
1
2
3
4
CN5
SB2 SB1
SB4 SB3
SB7 SB6
SB9 SB8
STM_JTMS
STM_JTCK SWCLK
SWDIO
SWD
RESERVED
DEFAULT
3V
T_SWDIO_IN
LED_STLINK
LED_STLINK 3V
PA13
PA14
TCK/SWCLK
TMS/SWDIO
VDD3V
Not Fitted
MCO
C4
1μF_X5R_0603
C1
10nF_X7R_0603
C6
1μF_X5R_0603
MCO
T_JRST
1
2
3
4
5
6
CN4
Header 6
AIN_1
T_NRST
T_SWO
NRST
SB10
T_NRST
SB5
RC Must be very close to STM32F103 pin 29
JP2
51
2
GND
3
4
BYPASS
INH
Vin Vout
U1 LD3985M33R
D1
BAT60JFILM
D3
BAT60JFILM
D4
BAT60JFILM
Idd
EXT_5V, Input or Output
JP1
TX
RX
STLINK_RX
Not Fitted
SB11
SB12
PA10
PA9
STM32F0_USART1_TX
STM32F0_USART1_RX
Close to JP
Not Fitted
STLINK_TX
USB_DM
USB_DP
VCC 1
D- 2
D+ 3
ID 4
GND 5
SHELL 6
CN1
USB-MINI-typeB
T_SWO
EXT_3V, Input or Output
Red
_Green
2 1
3 4
LD1
LD_BICOLOR_CMS
R8 1K5
R10 0
R9 0
R7 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
100nF
C7
100nF
C8
100nF
C5
100nF
C32
20pF
C9
20pF
C10
20pF
C11
100nF
C3
100nF
C2
100nF
3
1
2
T1
9013-SOT23
R16
10K
R17
36K
U5V
3V
LD2
LED, red
DocID025474 Rev 2 27/31
UM1690 Electrical schematics
30
Figure 11. STM32F072RBT6 MCU
Must be very close to
the STM32F072
Electrical schematics UM1690
28/31 DocID025474 Rev 2
Figure 12. MEMS and USB
1
1
2
2
3
3
4
4
D D
C C
B B
A A
STMicroelectronics
Title:
Number: Rev: Sheet of
C.1(PCB.SCH) Date:10/28/2013
MB1076 4 5
STM32F072B-DISCO MEMS and USB
LEDs
LD_D
LD_D
LD_U
LD_L
LD_R
USBF4_DM
USBF4_DP
USB User
LD_U
LD_L
LD_R
5V
USBF4_DM
USBF4_DP
R13 0
R12 0
R11 100K
D2
BAT60JFILM
MEMS
MEMS_INT1
3V
SPI2_SCK
MEMS_INT1
NCS_MEMS_SPI
NCS_MEMS_SPI
VDD_IO
1
GND 13
C1 14
GND
8GND 9
VDD 16
CS_I2C/SPI
5
INT1
7DRDY/INT2
6
GND 10
GND 11
SA0/SDO
4SDA/SDI/SDO
3SCL/SPC
2VDD 15
GND 12
U3
L3GD20
C14
10uF
C13
10nF/25V
MEMS_INT2
SPI2_SCK
SPI2_MISO
SPI2_MOSI SPI2_MISO
SPI2_MOSI
MEMS_INT2
C15
100nF
1 2
3 4
5 6
7 8
CN3
SSM-104-L-DH
3V
Extension / RF EEprom Connector
5V
EXT_RESET
I2C2_SDA
I2C2_SCL EXT_RESETI2C2_SCL
I2C2_SDA
R30
330
R32
1K
R29
1K
R31
510
U
D
LR
R1
4K7
R2
4K7
3V
VCC 1
D- 2
D+ 3
ID 4
GND 5
SHELL 6
CN2
USB-MINI-typeB
TP1 TP2
Test Point with hole
LD6
LED, blue
LD3
LED, red
LD5
LED, green
LD4
LED, orange
DocID025474 Rev 2 29/31
UM1690 Electrical schematics
30
Figure 13. Linear sensor and pushbutton
1
1
2
2
3
3
4
4
D D
C C
B B
A A
STMicroelectronics
Title:
Number: Rev: Sheet of
C.1(PCB.SCH) Date:10/22/2013
MB1076 5 5
STM32F072B-DISCO Linear Sensor and Push Button
LS_P1
Linear sensor made of 3 electrodes
TS_G3_IO2
TS_G1_IO3
TS_G2_IO3
NRST
NRST
RESET Button
VDD
12
3 4
B2
SW-PUSH-CMS
SB22
R43
[NA]
C31
100nF
R40
10K
R39
10K
R38
10K
TS_G1_IO4
TS_G2_IO4
TS_G3_IO3
PB0
PA2
PA3
PA6
PA7
PB1
1
1
2
2
3
3
LS1
Linear Sensor
LS_P2
LS_P3
VDD
12
3 4
B1
SW-PUSH-CMS
SB21
B_USER
USER & WAKE-UP Button
R42
10K
R41
10K
C30
100nF
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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