STMICROELECTRONICS STM32F0DISCOVERY Discovery kit User Manual

STMICROELECTRONICS STM32F0DISCOVERY Discovery kit

Product Information

The STM32F0DISCOVERY is a discovery kit for STM32 F0 microcontrollers. It features the STM32F051R8T6 microcontroller and an embedded ST-LINK/V2 for programming and debugging. The kit also includes LEDs, push buttons, power supply options, and various connectors for connecting modules and accessories.

Introduction
The STM32F0DISCOVERY helps you to discover the STM32 F0 Cortex™-M0 features and to develop your applications easily. It is based on STM32F051R8T6, an STM32 F0 series 32-bit ARM® Cortex™ microcontroller, and includes an ST- LINK/V2 embedded debug tool, LEDs, push buttons and a prototyping board.

Table 1. Applicable tools

Conventions
Table 2 provides the definition of some conventions used in the present document.
Table 2. ON/OFF conventions

Quick start

The STM32F0DISCOVERY is a low-cost and easy-to-use development kit to quickly evaluate and start development with an STM32 F0 series microcontroller. Before installing and using the product, please accept the Evaluation Product License Agreement from www.st.com/stm32f0discovery. For more information on the STM32F0DISCOVERY and for demonstration software, visit www.st.com/stm32f0discovery.

Getting started

Follow the sequence below to configure the STM32F0DISCOVERY board and launch the
DISCOVER application:

1. Check jumper position on the board, JP2 on, CN2 on (Discovery selected).
2. Connect the STM32F0DISCOVERY board to a PC with a USB cable ‘type A to mini-B’ through USB connector CN1 to power the board. Red LED LD1 (PWR) and LD2 (COM) light up and green LED LD3 blinks.
3. Press user button B1 (bottom left corner of the board).
4. Observe how the green LED LD3 blinking changes according to USER button B1 clicks.
5. Each click on USER button B1 is confirmed by the blue LED LD4.
6. To study or modify the DISCOVER project related to this demo, visit www.st.com/stm32f0discovery and follow the tutorial.
7. Discover the STM32F0 features, download and execute programs proposed in the list of projects.
8. Develop your own application using available examples.

System requirements

• Windows PC (XP, Vista, 7)
• USB type A to Mini-B USB cable

Development toolchain supporting the STM32F0DISCOVERY

• Altium®, TASKING™ VX-toolset
• ARM®, Atollic TrueSTUDIO®
• IAR™, EWARM (IAR Embedded Workbench®)
• Keil™, MDK-ARM™

Order code
To order the STM32F0 Discovery kit, use the order code STM32F0DISCOVERY.

Features

The STM32F0DISCOVERY kit offers the following features:

• STM32F051R8T6 microcontroller featuring 64 KB Flash, 8 KB RAM 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
•  Four LEDs:
  • LD1 (red) for 3.3 V power on
  • LD2 (red/green) for USB communication
  • LD3 (green) for PC9 output
  • LD4 (blue) for PC8 output
• Two push buttons (user and reset)
• Extension header for LQFP64 I/Os for quick connection to prototyping board and easy probing.
• An additional board is provided with the kit which can be connected to the extension connector for even easier prototyping and probing.
• A large number of free ready-to-run application firmware examples are available on www.st.com/stm32f0discovery to support quick evaluation and development.

Hardware and layout

The STM32F0DISCOVERY is designed around the STM32F051R8T6 microcontroller in a 64-pin LQFP package. Figure 2 illustrates the connections between the STM32F051R8T6 and its peripherals (STLINK/ V2, push button, LEDs and connectors). Figure 3 and Figure 4 help you to locate these features on the STM32F0DISCOVERY.

STM32F051R8T6 microcontroller
This 32-bit low- and medium-density advanced ARM™ MCU with a high-performance ARM Cortex™-M0 32-bit RISC core has 64 Kbytes Flash, 8 Kbytes RAM, RTC, timers, ADC, DAC, comparators and communication interfaces.

The STM32 F0 delivers 32-bit performance and STM32 DNA essentials into applications typically addressed by 8- or 16-bit microcontrollers. It benefits from the combination of realtime performance, low-power operation, advanced architecture and peripherals associated to the STM32 ecosystem, which has made the STM32 a reference in the market. Now all this is accessible for cost- sensitive applications. The STM32 F0 offers unparalleled flexibility and scalability for home entertainment products, appliances, and industrial equipment.
This device provides the following benefits.

• Superior code execution for better performance and excellent code efficiency for reduced embedded memory usage
• High-performance connectivity and advanced analog peripherals to support a wide range of applications
• Flexible clock options and low power modes with fast wake-up for low power consumption

It has the following key features:

• Core and operating conditions
  • ARM® Cortex™-M0 0.9 DMIPS/MHz up to 48 MHz
  • 1.8/2.0 to 3.6 V supply range
• High-performance connectivity
  • 6 Mbit/s USART
  • 18 Mbit/s SPI with 4- to 16-bit data frame
  • 1 Mbit/s I²C fast-mode plus
  • HDMI CEC
• Enhanced control
  • 1x 16-bit 3-phase PWM motor control timer
  • 5x 16-bit PWM timers
  • 1x 16-bit basic timer
  • 1x 32-bit PWM timer
  • 12 MHz I/O toggling

Embedded ST-LINK/V2
The ST-LINK/V2 programming and debugging tool is integrated on the STM32F0DISCOVERY. The embedded ST-LINK/V2 can be used in 2 different ways according to the jumper states (see Table 3):

• Program/debug the MCU on board,
• Program/debug an MCU in an external application board using a cable connected to SWD connector CN3.

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.
Table 3. Jumper states

(default)
Both CN2 jumpers OFF| ST-LINK/V2 functions enabled for application through external CN3 connector (SWD supported)

1. Using ST-LINK/V2 to program/debug the STM32 F0 on board
   To program the STM32 F0 on board, simply plug in the two jumpers on CN2, as shown in Figure 8 in red, but do not use the CN3 connector as that could disturb communication with the STM32F051R8T6 of the STM32F0DISCOVERY .

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 CN2 as shown in Figure 9, and connect your application to the CN3 debug connector according to Table 4.
   Note: SB19 and SB22 must be OFF if you use CN3 pin 5 in your external application.
   Table 4. Debug connector CN3 (SWD Pin| CN3| 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

Power supply and power selection
The power supply is provided either by the host PC through the USB cable, or by an external 5V power supply.
The D1 and D2 diodes protect the 5V and 3V pins from external power supplies:

• 5V and 3V can be used as output power supplies when another application board is connected to pins P1 and P2. In this case, the 5V and 3V pins deliver a 5V or 3V power supply and power consumption must be lower than 100 mA.
• 5V can also be used as input power supplies e.g. when the USB connector is not connected to the PC.

In this case, the STM32F0DISCOVERY board must be powered by a power supply unit 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.

LEDs

• LD1 PWR: Red LED indicates that the board is powered.
• LD2 COM: Tricolor LED (COM) advises on the communication status as follows:
  • Slow blinking Red LED/Off: At power on before USB initialization
  • Fast blinking Red LED/Off: After the first correct communication between PC and STLINK/V2 (enumeration)
  • Red LED On: When initialization between PC and ST-LINK/V2 is successfully finished
  • Green LED On: After successful target communication initialization
  • Blinking Red/Green LED: During communication with target
  • Red LED On: Communication finished and OK
  • Orange LED On: Communication failure
• User LD3: Green user LED connected to the I/O PC9 of the STM32F051R8T6.
• User LD4: Blue user LED connected to the I/O PC8 of the STM32F051R8T6.

Push buttons

• B1 USER: User push button connected to the I/O PA0 of the STM32F051R8T6.
• B2 RESET: Push button used to RESET the STM32F051R8T6.

JP2 (Idd)
Jumper JP2, labeled Idd, allows the consumption of STM32F051R8T6 to be measured by removing the jumper and connecting an ammeter.

• Jumper on: STM32F051R8T6 is powered (default).
• Jumper off: an ammeter must be connected to measure the STM32F051R8T6 current, (if there is no ammeter, the STM32F051R8T6 is not powered).

OSC clock

1. OSC clock supply
   PF0 and PF1 can be used as GPIO or as HSE oscillator. By default these I/Os are configured as GPIO, so SB16 and SB17 are closed, SB18 is open and R22, R23, C13 and C14 are not populated. An external HSE clock can be provided to the MCU in three ways:

   • 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 STM32F051R8T6. Configuration needed:
   • SB16, SB18 CLOSED
   • R22, R23 removed
   • SB17 OPEN
   • Oscillator onboard. From X2 crystal (not provided). For typical frequencies and its capacitors and resistors, please refer to the STM32F051R8T6 Datasheet. Configuration needed:
   • SB16, SB17 SB18 OPEN
   • R22, R23, C13, C14 soldered
   • Oscillator from external PF0. From external oscillator through pin 7 of the P1 connector. Configuration needed:
   • SB16, SB17 CLOSED
   • SB18 OPEN
   • R22 and R23 removed

2. OSC 32 KHz clock supply
   PC14 and PC15 can be used as GPIO or as LSE oscillator. By default these I/Os are configured as GPIO, so SB20 & SB21 are closed and X3, R24, R25 are not populated. An external LSE clock can be provided to the MCU in two ways:

   • Oscillator onboard. From X3 crystal (not provided). Configuration needed:
   • SB20, SB21 OPEN
   • C15, C16, R24 and R25 soldered.
   • Oscillator from external PC14. From external oscillator trough the pin 5 of P1 connector. Configuration needed:
   • SB20, SB21 CLOSED
   • R24 and R25 removed

Solder bridges
Table 5. Solder bridge settings

SB16,17

(X2 crystal)(2)

| OFF| X2, C13, C14, R22 and R23 provide a clock. PF0, PF1 are disconnected from P1.
ON| PF0, PF1 are connected to P1 (R22, R23 and SB18 must not be fitted).
SB6,8,10,12 (Default)| ON| Reserved, do not modify.
SB5,7,9,11 (Reserved)| OFF| Reserved, do not modify.

SB20,21

(X3 crystal)

| OFF| X3, C15, C16, R24 and R25 deliver a 32 KHz clock. PC14, PC15 are not connected to P1.
ON| PC14, PC15 are only connected to P1 (R24, R25 must not be fitted).

SB4

(B2-RESET)

| ON| B2 push button is connected to the NRST pin of the STM32F051R8T6 MCU.
OFF| B2 push button is not connected the NRST pin of the STM32F051R8T6 MCU.
SB3

(B1-USER)

| ON| B1 push button is connected to PA0.
OFF| B1 push button is not connected to PA0.
SB1

(VBAT powered from VDD)

| ON| VBAT is permanently powered from VDD.
OFF| VBAT is not powered from VDD but pin3 of P1.
SB14,15 (RX,TX)| OFF| Reserved, do not modify.
ON| Reserved, do not modify.

SB19 (NRST)

| ON| NRST signal of the CN3 connector is connected to the NRST pin of the STM32F051R8T6 MCU.
OFF| NRST signal of the CN3 connector is not connected to the NRST pin of the STM32F051R8T6 MCU.
SB22 (T_SWO)| ON| SWO signal of the CN3 connector is connected to PB3.
OFF| SWO signal is not connected.
SB13 (STM_RST)| OFF| No incidence on STM32F103C8T6 (ST-LINK/V2) NRST signal.
ON| STM32F103C8T6 (ST-LINK/V2) NRST signal is connected to GND.

SB2 (BOOT0)

| ON| BOOT0 signal of the STM32F051R8T6 MCU is held low through a 510 Ohm pull-down resistor.
OFF| BOOT0 signal of the STM32F051R8T6 MCU can be set high through a 10 KOhm pull-up resistor R27 to solder.
SB18 (MCO)(2)| ON| Provides the 8 MHz for OSC_IN from MCO of STM32F103C8T6.
OFF| See SB16, SB17 description.

Extension connectors
The male headers P1 and P2 can connect the STM32F0DISCOVERY to a standard prototyping/wrapping board. STM32F051R8T6 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

Main function

| ****

Alternate functions

| LQFP64| Push button| LED| SWD| OSC| Free I/O| Power supply| CN3| P1| P2
BOOT0| BOOT0| 60|  |  |  |  |  |  |  |  | 6

NRST

| ****

NRST

| ****

7

| RESET|  | NRST|  |  |  | ****

5

| ****

10

|

PA0

| 2_CTS, IN0,

2_CH1_ETR,

1_INM6,

1_OUT, TSC_G1_IO1, RTC_TAMP2, WKUP1

| ****

14

| USER|  |  |  |  |  |  | ****

15

|

PA1

| 2_RTS, IN1, 2_CH2,

1_INP, TSC_G1_IO2, EVENTOUT

| ****

15

|  |  |  |  |  |  |  | ****

16

|

PA2

| 2_TX, IN2, 2_CH3,

15_CH1,

2_INM6,

2_OUT, TSC_G1_IO3

| ****

16

|  |  |  |  |  |  |  | ****

17

|

PA3

| 2_RX, IN3, 2_CH4,

15_CH2,

2_INP, TSC_G1_IO4,

| ****

17

|  |  |  |  |  |  |  | ****

18

|
MCU pin| Board function
---|---
Main function| Alternate functions| LQFP64| Push button| LED| SWD| OSC| Free I/O| Power supply| CN3| P1| P2
PA4| 1_NSS / 1_WS, 2_CK, IN4, 14_CH1, DAC1_OUT, 1_INM4, 2_INM4, TSC_G2_IO1| 20|  |  |  |  |  |  |  | 21|
PA5| 1_SCK / 1_CK, CEC, IN5, 2_CH1_ETR, (DAC2_OUT), 1_INM5, 2_INM5, TSC_G2_IO2| 21|  |  |  |  |  |  |  | 22|
PA6| 1_MISO / 1_MCK, IN6, 3_CH1, 1_BKIN,

16_CH1, 1_OUT, TSC_G2_IO3, EVENTOUT

| 22|  |  |  |  |  |  |  | 23|
PA7| 1_MOSI / 1_SD, IN7,3_CH2, 14_CH1, 1_CH1N, 17_CH1, 2_OUT, TSC_G2_IO4, EVENTOUT| 23|  |  |  |  |  |  |  | 24|
PA8| 1_CK, 1_CH1, EVENTOUT, MCO| 41|  |  |  |  |  |  |  |  |

25

PA9| 1_TX, 1_CH2, 15_BKIN, TSC_G4_IO1| 42|  |  |  |  |  |  |  |  | 24
MCU pin| Board function
---|---
Main function| Alternate functions| LQFP64| Push button| LED| SWD| OSC| Free I/O| Power supply| CN3| P1| P2
PA10| 1_RX, 1_CH3, 17_BKIN, TSC_G4_IO2| 43|  |  |  |  |  |  |  |  | 23
PA11| 1_CTS, 1_CH4, 1_OUT, TSC_G4_IO3, EVENTOUT| 44|  |  |  |  |  |  |  |  | 22
PA12| 1_RTS, 1_ETR, 2_OUT, TSC_G4_IO4, EVENTOUT| 45|  |  |  |  |  |  |  |  | 21
PA13| IR_OUT, SWDAT| 46|  |  | SWDIO|  |  |  | 4|  | 20
PA14| 2_TX, SWCLK| 49|  |  | SWCLK|  |  |  | 2|  | 17
PA15| 1_NSS / 1_WS, 2_RX,2_CH1_ETR, EVENTOUT| 50|  |  |  |  |  |  |  |  | 16
PB0| IN8, 3_CH3, 1_CH2N, TSC_G3_IO2, EVENTOUT| 26|  |  |  |  |  |  |  | 27|
PB1| IN9, 3_CH4, 14_CH1,1_CH3N, TSC_G3_IO3| 27|  |  |  |  |  |  |  | 28|
PB2 or NPOR (1.8V

mode)

|

TSC_G3_IO4

|

28

|  |  |  |  |  |  |  | 29|
PB3| 1_SCK / 1_CK, 2_CH2, TSC_G5_IO1, EVENTOUT| 55|  |  | SWO|  |  |  | 6|  | 11
MCU pin| Board function
---|---
Main function| Alternate functions| LQFP64| Push button| LED| SWD| OSC| Free I/O| Power supply| CN3| P1| P2
PB4| 1_MISO / 1_MCK, 3_CH1, TSC_G5_IO2, EVENTOUT| 56|  |  |  |  |  |  |  |  | 10
PB5| 1_MOSI / 1_SD, 1_SMBA, 16_BKIN, 3_CH2| 57|  |  |  |  |  |  |  |  | 9
PB6| 1_SCL, 1_TX, 16_CH1N, TSC_G5_IO3| 58|  |  |  |  |  |  |  |  | 8
PB7| 1_SDA, 1_RX, 17_CH1N, TSC_G5_IO4| 59|  |  |  |  |  |  |  |  | 7
PB8| 1_SCL, CEC, 16_CH1, TSC_SYNC| 61|  |  |  |  |  |  |  |  | 4
PB9| 1_SDA, IR_EVENTOUT, 17_CH1,EVENTOUT| 62|  |  |  |  |  |  |  |  | 3
PB10| 2_SCL, CEC, 2_CH3, SYNC| 29|  |  |  |  |  |  |  | 30|
PB11| 2_SDA, 2_CH4, G6_IO1, EVENTOUT| 30|  |  |  |  |  |  |  | 31|
PB12| 2_NSS, 1_BKIN, G6_IO2, EVENTOUT| 33|  |  |  |  |  |  |  | 32|
PB13| 2_SCK, 1_CH1N, G6_IO3| 34|  |  |  |  |  |  |  |  | 32
MCU pin| Board function
---|---
Main function| Alternate functions| LQFP64| Push button| LED| SWD| OSC| Free I/O| Power supply| CN3| P1| P2
PB14| 2_MISO, 1_CH2N, 15_CH1, G6_IO4| 35|  |  |  |  |  |  |  |  | 31
PB15| 2_MOSI, 1_CH3N, 15_CH1N, 15_CH2, RTC_REFIN| 36|  |  |  |  |  |  |  |  | 30
PC0| IN10, EVENTOUT| 8|  |  |  |  |  |  |  | 11|
PC1| IN11, EVENTOUT| 9|  |  |  |  |  |  |  | 12|
PC2| IN12, EVENTOUT| 10|  |  |  |  |  |  |  | 13|
PC3| IN13, EVENTOUT| 11|  |  |  |  |  |  |  | 14|
PC4| IN14, EVENTOUT| 24|  |  |  |  |  |  |  | 25|
PC5| IN15, TSC_G3_IO1| 25|  |  |  |  |  |  |  | 26|
PC6| 3_CH1| 37|  |  |  |  |  |  |  |  | 29
PC7| 3_CH2| 38|  |  |  |  |  |  |  |  | 28
PC8| 3_CH3| 39|  | BLUE|  |  |  |  |  |  | 27
PC9| 3_CH4| 40|  | GREEN|  |  |  |  |  |  | 26
PC10|  | 51|  |  |  |  |  |  |  |  | 15
PC11|  | 52|  |  |  |  |  |  |  |  | 14
PC12|  | 53|  |  |  |  |  |  |  |  | 13
PC13| RTC_TAMP1, RTC_TS, RTCOUT, WKUP2| 2|  |  |  |  |  |  |  | 4|
MCU pin| Board function
---|---
Main function| Alternate functions| LQFP64| Push button| LED| SWD| OSC| Free I/O| Power supply| CN3| P1| P2
PC14- OSC32 IN| OSC32_IN|

3

|  |  |  | OSC32IN|  |  |  | 5|
PC15- OSC32 OUT| OSC32_OUT| 4|  |  |  | OSC32_OUT|  |  |  | 6|
PD2| 3_ETR| 54|  |  |  |  |  |  |  |  | 12
PF0- OSC_IN| OSC_IN|

5

|  |  |  | OSCIN|  |  |  | 7|
PF1- OSC OUT| OSC_OUT|

6

|  |  |  | OSC_OUT|  |  |  | 8|
PF4| EVENTOUT| 18|  |  |  |  |  |  |  | 19|
PF5| EVENTOUT| 19|  |  |  |  |  |  |  | 20|
PF6| 2_SCL| 47|  |  |  |  |  |  |  |  | 19
PF7| 2_SDA| 48|  |  |  |  |  |  |  |  | 18
VBAT| VBAT| 1|  |  |  |  |  |  |  | 3|
VDD_1|  | 64|  |  |  |  |  |  |  |  |
VDD_2|  | 32|  |  |  |  |  |  |  |  |
VDDA|  | 13|  |  |  |  |  |  |  |  |
VSS_1|  | 63|  |  |  |  |  |  |  |  |
VSS_2|  | 31|  |  |  |  |  |  |  |  |
VSSA|  | 12|  |  |  |  |  |  |  |  |
 |  |  |  |  |  |  |  | 5V|  |  | 1
 |  |  |  |  |  |  |  | 3V|  | 1|
 |  |  |  |  |  |  |  | VDD|  |  | 5
 |  |  |  |  |  |  |  | GND|  | 2| 2
 |  |  |  |  | GND|  |  | GND| 3|  |
MCU pin| Board function
---|---
Main function| Alternate functions| LQFP64| Push button| LED| SWD| OSC| Free I/O| Power supply| CN3| P1| P2
 |  |  |  |  |  |  |  | GND|  | 9|
 |  |  |  |  |  |  |  | GND|  | 33| 33

Connecting modules on the prototyping board

This section gives some examples of how to connect ready-to-use modules available from different manufacturers to the STM32F0DISCOVERY kit via the prototyping board included in the kit.
Software examples, based on the connections described below, are available at www.st.com/stm32f0discovery.

Mikroelektronica accessory boards
Mikroelektronika, http://www.mikroe.com, has specified two standard connectors for their accessory boards, named mikroBUS™ (http://www.mikroe.com/mikrobus_specs.pdf) and IDC10.
MikroBUS™ is a 16-pin connector to connect accessory boards very quickly and easily to a microcontroller board through SPI, USART or I2C communications, along with additional pins such as Analog Input, PWM and Interrupt. The set of mikroElektronika boards compatible with mikroBUS™ is called “Click boards”. IDC10 is a 10-pin connector to connect the general purpose I/O of an MCU to other accessory boards.
The tables below are one solution for connecting mikroBUS™ and IDC boards to the STM32F0DISCOVERY; this solution used in the different examples is available at www.st.com/stm32f0discovery.
Table 7. Connecting using mikroBUS™

Table 8. Connecting using IDC10

The Figure 10 illustrates the connections between the STM32F0 Discovery and the 2 connectors, IDC10 and mikroBUS™.

ST MEMS “adapter boards”, standard DIL24 socket
STMicroelectronics has defined a standard DIL24 connector to easily evaluate its MEMS sensors connected to a microcontroller through SPI or I2C communications. Table 9 is one solution for connecting the DIL24 boards to the STM32F0DISCOVERY, this solution is used in different examples and available at www.st.com/stm32f0discovery.
Table 9. Connecting with a DIL24 board

SPI1_MOSI
P22| SDO SPI Serial Data Output I2C less significant bit of the device address| PB4| SPI1_MISO
P23| NC|  |
P24| NC|  |

Figure 11 illustrates the connections between the STM32F0 Discovery and the DIL24 socket.

Supported MEMS adapter boards
Table 10 is a list of supported MEMS adapter boards as of April, 2012.
Table 10. Supported MEMS adapter boards

Note: For an up-to-date list, visit http://www.st.com/internet/evalboard/subclass/1116.jsp. The DIL24 boards are described as “adapter boards” in the field “General Description”.

Arduino shield boards
Arduino™ is an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software. See http://www.arduino.cc for more information. Arduino accessory boards are called “Shields” and can be easily connected to the STM32F0 Discovery according to the following table.
Table 11. Connecting with Arduino shields

Connecting with Arduino shields

Arduino power connector| STM32F0DISCOVERY
Reset| Reset from Shield board| NRST| Reset discovery
3V3| VCC 3.3V power line| 3V| VDD
5V| VCC 5V power line| 5V| VDD
GND| Reference Ground| GND| Reference Ground
GND| Reference Ground| GND| Reference Ground
Vin| External alimentation| VBAT| Jumper to fit
Arduino analog in connector| STM32F0DISCOVERY
A0| Analog input or Digital pin 14| PC0| ADC_IN10
A1| Analog input or Digital pin 15| PC1| ADC_IN11
A2| Analog input or Digital pin 16| PC2| ADC_IN12
A3| Analog input or Digital pin 17| PC3| ADC_IN13
A4| Analog input or SDA or Digital pin 18| PC4 or PF7| ADC_IN14 or I2C2_SDA
A5| Analog input or SCL or Digital pin 19| PC5 or PF6| ADC_IN15 or I2C2_SCL
Arduino digital connector| STM32F0DISCOVERY
D0| Digital pin 0 or RX| PA3| USART2_RX
D1| Digital pin 1 or TX| PA2| USART2_TX
D2| Digital pin 2 / External interrupt| PB12| EXTI (5V tolerant)
D3| Digital pin 3 / Ext int or PWM| PB11| EXTI (5V tolerant) or TIM2_CH4
D4| Digital pin 4| PA7| GPIO (3V tolerant)
D5| Digital pin 5 or PWM| PB9| TIM17_CH1
D6| Digital pin 6 or PWM| PB8| TIM16_CH1
D7| Digital pin 7| PA6| GPIO (3V tolerant)
D8| Digital pin 8| PA5| GPIO (3V tolerant)
D9| Digital pin 9 or PWM| PA4| TIM14_CH1
D10| Digital pin 10 or CS or PWM| PA11| TIM1_CH4
D11| Digital pin 11 or MOSI or PWM| PB5| SPI1_MOSI or TIM3_CH2
D12| Digital pin 12 or MISO| PB4| SPI1_MISO
D13| Digital pin 13 or SCK| PB3| SPI1_SCK
GND| Reference Ground| GND| Reference Ground
AREF| ADC voltage reference| NC| Not connected
Connecting with Arduino shields (continued)

Arduino ICSP connector| STM32F0DISCOVERY
1| MISO| PB4| SPI1_MISO
2| VCC 3.3V| 3V| VDD
3| SCK| PB3| SPI1_SCK
4| MOSI| PB5| SPI1_MOSI
5| RST| NRST| Reset discovery
6| GND| GND| Reference Ground

Figure 12 illustrates the connections between the STM32F0 Discovery and the Arduino shield boards.

Mechanical drawing

Electrical schematics

Revision history

Table 12. Document revision history

on page 27_.

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References

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