ST STM32 NUCLEO-F030R8 User manual

June 2014 DocID025833 Rev 4 1/55
UM1724
User manual
STM32 Nucleo boards
Introduction
The STM32 Nucleo board (NUCLEO-F030R8, NUCLEO-F072RB, NUCLEO-F103RB,
NUCLEO-F302R8, NUCLEO-F334R8, NUCLEO-F401RE, NUCLEO-F411RE, NUCLEO-
L053R8, NUCLEO-L152RE) provides an affordable and flexible way for users to try out new
ideas and build prototypes with any STM32 microcontroller lines, choosing from the various
combinations of performance, power consumption and features. The Arduino™
connectivity support and ST Morpho headers make it easy to expand the functionality of the
Nucleo open development platform with a wide choice of specialized shields. The STM32
Nucleo board does not require any separate probe as it integrates the ST-LINK/V2-1
debugger/programmer. The STM32 Nucleo board comes with the STM32 comprehensive
software HAL library together with various packaged software examples, as well as direct
access to mbed online resources at mbed.org.
Figure 1. STM32 Nucleo board (1)
1. Picture not contractual.
www.st.com
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Contents UM1724
2/55 DocID025833 Rev 4
Contents
1 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Quick start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1 Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.2 System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1 Hardware configuration variants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5 Hardware layout and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.1 Cutable PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.2 Embedded ST-LINK/V2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.2.1 Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.2.2 ST-LINK/V2-1 firmware upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.2.3 Using the ST-LINK/V2-1 to program/debug the STM32 on board . . . . 14
5.2.4 Using ST-LINK/V2-1 to program/debug an external STM32 application 15
5.3 Power supply and power selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.3.1 Power supply input from the USB connector . . . . . . . . . . . . . . . . . . . . . 16
5.3.2 External power supply inputs: VIN and EV5 . . . . . . . . . . . . . . . . . . . . . 17
5.3.3 External power supply input: + 3V3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.3.4 External power supply output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.4 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.5 Push buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.6 JP6 (IDD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.7 OSC clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.7.1 OSC clock supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.7.2 OSC 32 kHz clock supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.8 USART communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.9 Solder bridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.10 Extension connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.11 Arduino connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
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DocID025833 Rev 4 3/55
UM1724 Contents
3
5.12 STMicroelectronics Morpho connector . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
6 Mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
7 Electrical schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
8 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
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List of tables UM1724
4/55 DocID025833 Rev 4
List of tables
Table 1. Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 2. ON/OFF conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 3. Jumper states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 4. Debug connector CN4 (SWD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 5. JP1 configuration table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 6. External power sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 7. Power-related jumper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 8. +3.3V eternal power source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 9. Solder bridges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 10. Arduino connectors on NUCLEO-F030R8, NUCLEO-F072RB. . . . . . . . . . . . . . . . . . . . . . 32
Table 11. Arduino connectors on NUCLEO-F103RB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 12. Arduino connectors on NUCLEO-F302R8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 13. Arduino connectors on NUCLEO-F334R8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 14. Arduino connectors on NUCLEO-F401RE, NUCLEO-F411RE . . . . . . . . . . . . . . . . . . . . . 39
Table 15. Arduino connectors on NUCLEO-L053R8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 16. Arduino connectors on NUCLEO-L152RE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 17. STMicroelectronics Morpho connector on NUCLEO-F030R8 . . . . . . . . . . . . . . . . . . . . . . 43
Table 18. STMicroelectronics Morpho connector on NUCLEO-F072RB,
NUCLEO-F334R8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Table 19. STMicroelectronics Morpho connector on NUCLEO-F103RB . . . . . . . . . . . . . . . . . . . . . . 45
Table 20. STMicroelectronics Morpho connector on NUCLEO-F302R8 . . . . . . . . . . . . . . . . . . . . . . 46
Table 21. STMicroelectronics Morpho connector on NUCLEO-F401RE,
NUCLEO-F411RE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Table 22. STMicroelectronics Morpho connector on NUCLEO-L152RE,
NUCLEO-L053R8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Table 23. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
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DocID025833 Rev 4 5/55
UM1724 List of figures
5
List of figures
Figure 1. STM32 Nucleo board (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2. Hardware block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 3. Top layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 4. Bottom layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 5. Typical configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 6. Updating the list of drivers in Device Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 7. Connecting the STM32 Nucleo board to program the on-board STM32 . . . . . . . . . . . . . . 15
Figure 8. Using ST-LINK/V2-1 to program the STM32 on an external application . . . . . . . . . . . . . . 16
Figure 9. NUCLEO-F030R8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 10. NUCLEO-F072RB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 11. NUCLEO-F103RB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 12. NUCLEO-F302R8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 13. NUCLEO-F334R8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 14. NUCLEO-F401RE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 15. NUCLEO-F411RE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 16. NUCLEO-L053R8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 17. NUCLEO-L152RE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 18. STM32 Nucleo board mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Figure 19. Schematic (1/4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Figure 20. Schematic (2/4). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Figure 21. Schematic (3/4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Figure 22. Schematic (4/4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
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Ordering information UM1724
6/55 DocID025833 Rev 4
1 Ordering information
Table 1 lists the order codes and the respective targeted MCU.
The meaning of NUCLEO-TXXXRY codification is as follows:
•TXXX describes the STM32 MCU product line
•R describes the pin count (R for 64 pins)
•Y describes the code size (8 for 64K, B for 128K, E for 512K)
The order code is printed on a sticker placed at the top or bottom side of the board.
Table 1. Ordering information
Order code Targeted MCU
NUCLEO-F030R8 STM32F030R8T6
NUCLEO-F072RB STM32F072RBT6
NUCLEO-F103RB STM32F103RBT6
NUCLEO-F302R8 STM32F302R8T6
NUCLEO-F334R8 STM32F334R8T6
NUCLEO-F401RE STM32F401RET6
NUCLEO-F411RE STM32F411RET6
NUCLEO-L053R8 STM32L053R8T6
NUCLEO-L152RE STM32L152RET6
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DocID025833 Rev 4 7/55
UM1724 Conventions
54
2 Conventions
Table 2 provides the conventions used for the ON and OFF settings in the present
document.
We refer to “STM32 Nucleo board” and “STM32 Nucleo boards” in this document for all
information that is common to all sale types.
Table 2. ON/OFF conventions
Convention Definition
Jumper JP1 ON Jumper fitted
Jumper JP1 OFF Jumper not fitted
Solder bridge SBx ON SBx connections closed by solder or 0 ohm resistor
Solder bridge SBx OFF SBx connections left open
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Quick start UM1724
8/55 DocID025833 Rev 4
3 Quick start
The STM32 Nucleo board is a low-cost and easy-to-use development platform used to
quickly evaluate and start a development with an STM32 microcontroller in LQFP64
package.
Before installing and using the product, please accept the Evaluation Product License
Agreement from www.st.com/stm32nucleo.
For more information on the STM32 Nucleo boards and to access the demonstration
software, visit www.st.com/stm32nucleo.
3.1 Getting started
Follow the sequence below to configure the STM32 Nucleo board and launch the demo
software:
1. Check the jumper position on the board, JP1 off, JP5 (PWR) on U5V, JP6 on (IDD),
CN2 on (NUCLEO) selected.
2. For correct identification of all device interfaces from the host PC, install the Nucleo
USB driver available on www.st.com/stm32nucleo, prior to connecting the board
3. Connect the STM32 Nucleo board to a PC with a USB cable ‘type A to mini-B’ through
USB connector CN1 to power the board. The red LED LD3 (PWR) and LD1 (COM)
should light up. LD1 (COM) and green LED LD2 should blink.
4. Press button B1 (left button).
5. Observe how the blinking of the green LED LD2 changes according to clicks on button
B1.
6. The demo software and several software examples on how use the STM32 Nucleo
board features are available on www.st.com/stm32nucleo.
7. Develop your own application using the available examples.
3.2 System requirements
•Windows PC (XP, Vista, 7, 8)
•USB type A to Mini-B USB cable
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DocID025833 Rev 4 9/55
UM1724 Features
54
4 Features
The STM32 Nucleo boards offer the following features:
•STM32 microcontroller with LQFP64 package
•Two types of extension resources
– Arduino Uno Revision 3 connectivity
– STMicroelectronics Morpho extension pin headers for full access to all STM32 I/Os
•mbed-enabled(a)
•On-board ST-LINK/V2-1 debugger/programmer with SWD connector
– selection-mode switch to use the kit as a standalone ST-LINK/V2-1
•Flexible board power supply
– USB VBUS
– External VIN (7V<VIN<12V) supply voltage from Arduino connectors or ST
Morpho connector
– External 5V (E5V) supply voltage from ST Morpho connector
– External +3.3V supply voltage from Arduino connector or ST Morpho connector
•Three LEDs
– USB communication (LD1), user LED (LD2), power LED (LD3)
•Two push buttons: USER and RESET
•LSE crystal:
– 32.768kHz crystal oscillator (depending on board version)
•USB re-enumeration capability: three different interfaces supported on USB
– Virtual Com port
– Mass storage
– Debug port
•Comprehensive free software HAL library including a variety of software examples
•Supported by wide choice of Integrated Development Environments (IDEs) including IAR,
Keil, GCC-based IDEs
4.1 Hardware configuration variants
The board can be delivered with different configurations of the oscillator of the target MCU.
For all the details concerning High Speed oscillator configurations refer to Section 5.7.1. For
all the details concerning Low speed oscillator configurations refer to Section 5.7.2.
a. See http://mbed.org/
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Hardware layout and configuration UM1724
10/55 DocID025833 Rev 4
5 Hardware layout and configuration
The STM32 Nucleo board is designed around the STM32 microcontrollers in a 64-pin LQFP
package.
Figure 2 shows the connections between the STM32 and its peripherals (ST-LINK/V2-1,
pushbutton, LED, Arduino connectors and STMicroelectronics Morpho connector).
Figure 3 and Figure 4 show the location of these features on the STM32 Nucleo board.
Figure 2. Hardware block diagram
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DocID025833 Rev 4 11/55
UM1724 Hardware layout and configuration
54
Figure 3. Top layout
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Hardware layout and configuration UM1724
12/55 DocID025833 Rev 4
Figure 4. Bottom layout
5.1 Cutable PCB
The STM32 Nucleo board is divided into two parts: ST-LINK part and target MCU part. The
ST-LINK part of the PCB can be cut out to reduce the board size. In this case the remaining
target MCU part can only be powered by VIN, E5V and 3.3V on STMicroelectronics Morpho
connector CN7 or VIN and 3.3V on Arduino connector CN6. It is still possible to use the ST-
LINK part to program the main MCU using wires between CN4 and SWD signals available
on STMicroelectronics Morpho connector (SWCLK CN7 pin 15 and SWDIO CN7 pin 13).
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DocID025833 Rev 4 13/55
UM1724 Hardware layout and configuration
54
5.2 Embedded ST-LINK/V2-1
The ST-LINK/V2-1 programming and debugging tool is integrated in the STM32 Nucleo
boards.
The ST-LINK/V2-1 makes the STM32 Nucleo boards mbed enabled.
The embedded ST-LINK/V2-1 supports only SWD for STM32 devices. For information about
debugging and programming features refer to UM1075 - ST-LINK/V2 in-circuit
debugger/programmer for STM8 and STM32, User manual, which describes in detail all the
ST-LINK/V2 features.
The changes versus ST-LINK/V2 version are listed below.
•New features supported on ST-LINK/V2-1:
– USB software re-enumeration
– Virtual com port interface on USB
– Mass storage interface on USB
– USB power management request for more than 100 mA power on USB
•Features not supported on ST-LINK/V2-1:
–SWIMinterface
– Minimum supported application voltage limited to 3 V
There are two different ways to use the embedded ST-LINK/V2-1 depending on the jumper
states (see Table 3 and Figure 5):
•Program/debug the MCU on board (Section 5.2.2),
•Program/debug an MCU in an external application board using a cable connected to
SWD connector CN4 (Section 5.2.4).
Figure 5. Typical configuration
Table 3. Jumper states
Jumper state Description
Both CN2 jumpers ON ST-LINK/V2-1 functions enabled for on board programming
(default)
Both CN2 jumpers OFF ST-LINK/V2-1 functions enabled for external CN4 connector
(SWD supported)
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Hardware layout and configuration UM1724
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5.2.1 Drivers
The ST-LINK/V2-1 requires a dedicated USB driver, which can be found on www.st.com for
Windows Vista, 7 and 8. On Windows XP the ST-LINK/V2-1 driver requires WinUsb to be
installed before using the ST-LINK/V2-1 (either available from Microsoft website or included
in the USB driver for ST-LINK/V2 for XP).
In case the STM32 Nucleo board is connected to the PC before the driver is installed, some
Nucleo interfaces may be declared as “Unknown” in the PC device manager. In this case
the user must install the driver files (Figure 6), and from the device manager update the
driver of the connected device.
Note: Prefer using the “USB Composite Device” handle for a full recovery.
Figure 6. Updating the list of drivers in Device Manager
5.2.2 ST-LINK/V2-1 firmware upgrade
The 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 before starting to use the STM32 Nucleo board and
periodically, in order to stay up-to-date with the latest firmware version.
5.2.3 Using the ST-LINK/V2-1 to program/debug the STM32 on board
To program the STM32 on the board, plug in the two jumpers on CN2, as shown in red in
Figure 7. Do not use the CN4 connector as this could disturb the communication with the
STM32 microcontroller of the STM32 Nucleo board.
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UM1724 Hardware layout and configuration
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Figure 7. Connecting the STM32 Nucleo board to program the on-board STM32
5.2.4 Using ST-LINK/V2-1 to program/debug an external STM32 application
It is very easy to use the ST-LINK/V2-1 to program the STM32 on an external application.
Simply remove the two jumpers from CN2 as illustrated in Figure 8, and connect your
application to the CN4 debug connector according to Table 4.
Note: SB12 NRST (target MCU RESET) must be OFF if you use CN4 pin 5 in your external
application.
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Table 4. Debug connector CN4 (SWD)
Pin CN4 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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Hardware layout and configuration UM1724
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Figure 8. Using ST-LINK/V2-1 to program the STM32 on an external application
5.3 Power supply and power selection
The power supply is provided either by the host PC through the USB cable, or by an
external Source: VIN (7V-12V), E5V (5V) or +3V3 power supply pins on CN6 or CN7. In
case VIN, E5V or +3V3 is used to power the Nucleo board, using an external power supply
unit or an auxiliary equipment, this power source must comply with the standard EN-60950-
1: 2006+A11/2009, and must be Safety Extra Low Voltage (SELV) with limited power
capability.
5.3.1 Power supply input from the USB connector
The ST-LINK/V2-1 supports USB power management allowing to request more than
100 mA current to the host PC.
All parts of the STM32 Nucleo board and shield can be powered from the ST-LINK USB
connector CN1 (U5V or VBUS). Note that only the ST-LINK 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 STM32 Nucleo board requires 300 mA of current to the Host PC.
If the host is able to provide the required power, the targeted STM32 microcontroller is
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UM1724 Hardware layout and configuration
54
powered and the red LED LD3 is turned ON, thus the STM32 Nucleo board and its shield
can consume a maximum of 300 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 LD3 remains
turned OFF. In such case it is mandatory to use an external power supply as explained in
the next chapter.
When the board is power supplied by USB (U5V) a jumper must be connected between pin
1 and pin 2 of JP5 as shown in Table 7.
JP1 is configured according to the maximum current consumption of the board when
powered by USB (U5V). JP1 jumper can be set in case the board is powered by USB and
maximum current consumption on U5V doesn’t exceed 100mA (including an eventual
extension board or Arduino Shield). In such condition USB enumeration will always succeed
since no more than 100mA is requested to the PC. Possible configurations of JP1 are
summarized in Table 5.
Warning: If the maximum current consumption of the NUCLEO and its
extension boards exceeds 300 mA, it is mandatory to power
the NUCLEO using an external power supply connected to
E5V or VIN.
Note: In case the board is powered by an USB charger, there is no USB enumeration, so the led
LD3 remains set to OFF permanently and the target MCU is not powered. In this specific
case the jumper JP1 needs to be set to ON, to allow target MCU to be powered anyway.
5.3.2 External power supply inputs: VIN and EV5
The external power sources VIN and EV5 are summarized in the Table 6. When the board is
power supplied by VIN or E5V, the jumpers configuration must be the following:
Jumper on JP5 pin 2 and pin 3
Jumper removed on JP1
Table 5. JP1 configuration table
Jumper state Power supply Allowed current
JP1 jumper OFF
USB power through CN1
300 mA max
JP1 jumper ON 100 mA max
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Hardware layout and configuration UM1724
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Using VIN or E5V as external power supply
VIN or E5V can be used as external power supply in case the current consumption of
NUCLEO and extensions boards exceeds 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 VIN or E5V 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 jumper between pin 2 and pin 3 of JP5.
2. Check that JP1 is removed.
3. Connect the external power source to VIN or E5V.
4. Power on the external power supply 7 V< VIN < 12 V to VIN, or 5 V for E5V.
5. Check that LD3 is turned ON.
6. Connect the PC to USB connector CN1.
If this order is not respected, the board may be supplied by VBUS first then by VIN or E5V,
and the following risks may be encountered:
Table 6. External power sources
Input power
name
Connectors
pins Voltage range Max current Limitation
VIN CN6 pin 8
CN7 pin 24 7 V to 12 V 800 mA
From 7 V to 12 V only and input current capability
is linked to input voltage:
800 mA input current when Vin=7 V
450 mA input current when 7 V<Vin (< or =) 9 V
250 mA input current when 9 V<Vin (< or =) 12 V
E5V CN7 pin 6 4.75 V to
5.25 V 500 mA -
Table 7. Power-related jumper
Jumper Description
JP5
U5V (ST-LINK VBUS) is used as power source when JP5 is set as shown below
(Default setting)
VIN or E5V is used as power source when JP5 is set as shown below.
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UM1724 Hardware layout and configuration
54
1. If more than 300 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. 300 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 LD3 remains OFF).
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Hardware layout and configuration UM1724
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5.3.3 External power supply input: + 3V3
It can be of interest to use the +3V3 (CN6 pin 4 or CN7 pin 12 and pin 16) directly as power
input for instance in case the 3.3 V is provided by an extension board. When NUCLEO is
power supplied by +3V3, the ST-LINK is not powered thus the programming and debug
features are unavailable. The external power sources +3.3V is summarized in the Table 8.
Two different configurations are possible to use +3V3 to power the board:
•ST-LINK is removed (PCB cut), or
•SB2 (3V3 regulator) & SB12 (NRST) are OFF.
5.3.4 External power supply output
When powered by USB, VIN or E5V, the +5V (CN6 pin 5 or CN7 pin 18) can be used as
output power supply for an Arduino shield or an extension board. In this case, the maximum
current of the power source specified in Table 6 needs to be respected.
The +3.3 V (CN6 pin 4 or CN7 pin 12 & 16) can be used also as power supply output. The
current is limited by the maximum current capability of the regulator U4 (500 mA max).
5.4 LEDs
The tricolor LED (green, orange, red) LD1 (COM) provides information about ST-LINK
communication status. LD1 default color is red. LD1 turns to green to indicate that
communication is in progress between the PC and the ST-LINK/V2-1, with the following
setup:
•Slow blinking Red/Off: at power-on before USB initialization
•Fast blinking Red/Off: after the first correct communication between the PC and ST-
LINK/V2-1 (enumeration)
•Red LED On: when the initialization between the PC and ST-LINK/V2-1 is complete
•Green LED On: after a successful target communication initialization
•Blinking Red/Green: during communication with target
•Green On: communication finished and successful.
•Orange On: Communication failure
User LD2: the green LED is a user LED connected to Arduino signal D13 corresponding to
MCU I/O PA5 (pin 21) or PB13 (pin 34) depending on the STM32 target. Please refer to
Table 10 to Table 16.
•When the I/O is HIGH value, the LED is on.
•When the I/O is LOW, the LED is off.
LD3 PWR: the red LED indicates that the MCU part is powered and +5V power is available.
Table 8. +3.3V eternal power source
Input power
name Connectors pins Voltage range Limitation
+3V3 CN6 pin 4
CN7 pin 12 and pin 16 3 V to 3.6 V Used when ST-LINK part of PCB is cut
or SB2 and SB12 OFF
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