STMicroelectronics STM32G071B-DISCO User Manual

UM2401

User manual

STM32G0 Discovery kit for USB Type-C™ and Power Delivery

Introduction

The STM32G071B-DISCO Discovery board is a demonstration and development platform for the STMicroelectronics Arm ® Cortex ® -M0+ core-based STM32G071RB microcontroller and particularly the USB Type-C™ and Power Delivery controllers. The STM32G071B-

DISCO Discovery board is presented in a plastic casing with all necessary interfaces for easy connection to, and interoperability with, other USB Type-C™ devices. The

STM32G071B-DISCO Discovery board discovers and displays USB Type-C™ port capabilities such as data role, power role, V

BUS

and I

BUS monitoring. The integrated

ST-LINK/V2-1 provides an embedded in-circuit debugger and programmer for the STM32

MCU, allowing SWD debugging support and external GUI trace in the STM32Cube™

USB-PD monitor. All functions are accessible by a 4-way user joystick to glance through menus and information displayed by the 128 x 64 pixels OLED embedded display. An 8-pin user connector gathers all communication signals, with the possibility of additional internal

GPIO extensions.

The STM32G071B-DISCO Discovery board comes with the comprehensive free software libraries and examples available with the STM32Cube™ MCU Package.

Figure 1. STM32G071B-DISCO top view Figure 2. STM32G071B-DISCO bottom view

Pictures are not contractual.

December 2018 UM2401 Rev 1 1/36 www.st.com

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Contents

Contents

UM2401

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

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

System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Development toolchains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Demonstration software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Hardware layout and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

9.1

STM32G071B-DISCO Discovery board layout . . . . . . . . . . . . . . . . . . . . 10

9.2

STM32G071B-DISCO Discovery mechanical drawing . . . . . . . . . . . . . . 12

9.3

Embedded ST-LINK/V2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

9.3.1

9.3.2

Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

ST-LINK/V2-1 firmware upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

9.4

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

9.5

Clock references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

9.6

Reset Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

9.7

USB Type-C™ V

BUS

DC/DC converter to 5 V . . . . . . . . . . . . . . . . . . . . . 15

9.8

128 x 64 pixels OLED display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

9.9

IDD power consumption measurement . . . . . . . . . . . . . . . . . . . . . . . . . . 16

9.10

4-way user joystick with selection button . . . . . . . . . . . . . . . . . . . . . . . . . 16

9.11

Power current sensing ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

9.12

USB Type-C™ operating modes and connections . . . . . . . . . . . . . . . . . . 16

9.13

USB Type-C™ Receptacle mechanical door lock . . . . . . . . . . . . . . . . . . 16

9.14

Virtual COM port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2/36 UM2401 Rev 1

UM2401 Contents

12

13

10

11

14

9.15

Buttons and LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

10.1

CN1 User connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

10.2

CN5 USB Type-C™ Plug cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

10.3

CN7 USB Type-C™ Receptacle connector . . . . . . . . . . . . . . . . . . . . . . . 21

10.4

CN8 GPIO extension 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

10.5

CN9 GPIO extension 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

10.6

USB Type-C™ tests points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Jumpers and solder bridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

11.1

Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

11.2

Solder bridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

STM32G071B-DISCO known limitations . . . . . . . . . . . . . . . . . . . . . . . . 26

Federal Communications Commission (FCC) and

Industry Canada (IC) Compliance Statements . . . . . . . . . . . . . . . . . . . 27

13.1

FCC Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

13.1.1

Part 15.19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

13.1.2

Part 15.105 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

13.1.3

Part 15.21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

13.2

IC Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

13.2.1

Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

13.3

Déclaration de conformité . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Removal of the transparent backside cover for access to electronics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Appendix A Electrical schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

15 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

UM2401 Rev 1 3/36

3

List of tables

List of tables

UM2401

Table 1.

Table 2.

Table 3.

Table 4.

Table 5.

Table 6.

Table 7.

Table 8.

ON/OFF conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

LEDs assignment and functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

User connectivity CN1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

CN5 USB Type-C™ Plug cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

CN5 USB Type-C™ Plug cable pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

CN7 USB Type-C™ Receptacle connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

CN7 USB Type-C™ Receptacle connector pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Table 9.

CN8 GPIO extension 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Table 10.

CN9 GPIO extension 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Table 11.

Jumpers and description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Table 12.

Solder bridges and description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Table 13.

Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

4/36 UM2401 Rev 1

UM2401

List of figures

List of figures

Figure 1.

STM32G071B-DISCO top view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 2.

STM32G071B-DISCO bottom view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 3.

Hardware block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 4.

Top layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 5.

Bottom layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 6.

STM32G071B-DISCO board mechanical dimensions (top view) . . . . . . . . . . . . . . . . . . . . 12

Figure 7.

Mechanical drawing with casing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 8.

USB Composite Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 9.

Mechanical door system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 10.

Accessing the RESET button B1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 11.

LEDs and pictograms in front panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 12.

CN7 USB Type-C™ 24-pin connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 13.

CN7 USB Type-C™ 24-pin connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 14.

USB Type-C™ tests points location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 15.

Transparent backside cover removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 16.

Overall schematics for the board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 17.

MCU and display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Figure 18.

USB Type-C current sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 19.

Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 20.

ST-LINK V2.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

UM2401 Rev 1 5/36

5

Features

1 Features

UM2401

• STM32G071RB microcontroller featuring 128 Kbytes of Flash memory and 32 Kbytes of RAM in LQFP64 package

• Plastic case

• 1” 128 x 64 pixels OLED LCD module with SPI interface

• USB Type-C™ interface plug cable and receptacle connector accessible by door with reed sensor detection

• 3 bidirectional current and power monitors with I 2 and CC2 protected and isolated lines

C interface to measure V

BUS

, CC1

• On-board DC/DC converter to sustain power supply with V

BUS

(+/- 5 %)

varying from 3 V to 20 V

• 4 user status LEDs about USB Type-C™ configuration

• 3 LEDs for power and ST-LINK communication

• 4-way joystick with selection button

• 1 reset push-button

• Board external connectors:

– USB Type-C™ plug cable

– USB Type-C™ receptacle connector

– 8-pin user extension connector including ADC, SPI, USART and I

2

C communication signals

– USB with Micro-AB (ST-LINK)

• Board internal connectors:

– 2 x 8-pin GPIOs free pins from microcontroller (accessible internally when case is removed)

– USB Type-C™ test points for main signals

• Flexible power-supply options: ST-LINK USB V

BUS

or USB Type-C™ V

BUS

• On-board ST-LINK/V2-1 debugger/programmer with USB enumeration capability: mass storage, Virtual COM port and debug port

• Comprehensive free software libraries and examples available with the STM32Cube™

MCU Package

• Support of a wide choice of integrated development environments (IDEs), including

IAR™, Keil

®

and GCC-based IDEs

6/36 UM2401 Rev 1

UM2401 General information

The STM32G071B-DISCO embeds an STM32 32-bit microcontroller based on the Arm ®(a)

Cortex ® -M0+ processor.

Evaluation tools marked as “ES” or “E” are not yet qualified and are therefore not ready to be used as reference design or in production. Any consequences arising from such usage will not be at STMicroelectronics’ charge. In no event will STMicroelectronics be liable for any customer usage of these engineering sample tools as reference designs or in production.

‘E’ or ‘ES’ marking examples of location:

• on the targeted STM32 that is soldered on the board (for illustration of STM32 marking, refer to the section Package information in the STM32 datasheet at www.st.com

).

• next to the evaluation tool ordering part number, that is stuck or silkscreen printed on the board

This board features a specific STM32 device version, which allows the operation of any bundled commercial stack/library available. This STM32 device shows a "U" marking option at the end of the standard part number and is not available for sales.

In order to use the same commercial stack in his application, a developer may need to purchase a part number specific to this stack/library. The price of those part numbers includes the stack/library royalties.

• Windows ® OS (7, 8 and 10), Linux ® 64-bit or macOS ®(b)

• USB Type-A to Micro-B cable a. Arm is a registered trademark of Arm Limited (or its subsidiaries) in the US and or elsewhere.

b. macOS

®

is a trademark of Apple Inc., registered in the U.S. and other countries.

UM2401 Rev 1 7/36

35

Conventions

5 Conventions

UM2401

Table 1

provides the conventions used for the ON and OFF settings in the present document.

Convention

Jumper JPx ON

Jumper JPx OFF

Solder bridge SBx ON

Solder bridge SBx OFF

Table 1. ON/OFF conventions

Definition

Jumper fitted

Jumper not fitted

SBx connections closed by solder or 0 Ohm resistor

SBx connections left open

• Keil ® MDK-ARM (a)

• IAR™ EWARM

(a)

• GCC-based IDEs

The demonstration software, included in the STM32Cube MCU Package corresponding to the on-board microcontroller, is preloaded in the STM32 Flash memory for easy demonstration of the device peripherals in standalone mode. The latest versions of the demonstration source code and associated documentation can be downloaded from www.st.com

.

8/36

To order the STM32G071B-DISCO Discovery kit, refer to

Table 2

.

Order code

Table 2. Ordering information

Target STM32

STM32G071B-DISCO STM32G071RB a. On Windows only

UM2401 Rev 1

UM2401

9

Hardware layout and configuration

Hardware layout and configuration

The STM32G071B-DISCO Discovery board is designed around the STM32 microcontroller in a 64-pin LQFP package.

Figure 3 shows the connections between the STM32 and the external peripherals (ST-

LINK/V2-1, USB Type-C™ connectors, OLED display, current/power monitors, LEDs, joystick, GPIO connectors).

Figure 4

and Figure 5

show the location of these features on the STM32G071B-DISCO.

Figure 6 shows the PCB mechanical dimensions of the STM32G071B-DISCO Discovery

board.

Figure 7 shows the mechanical dimensions of the STM32G071B-DISCO Discovery board

with casing.

Figure 3. Hardware block diagram

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UM2401 Rev 1 9/36

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Hardware layout and configuration

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Figure 5. Bottom layout

Hardware layout and configuration

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UM2401 Rev 1 11/36

35

Hardware layout and configuration

Figure 6. STM32G071B-DISCO board mechanical dimensions (top view)

UM2401

12/36 UM2401 Rev 1

UM2401 Hardware layout and configuration

Figure 7. Mechanical drawing with casing

UM2401 Rev 1 13/36

35

Hardware layout and configuration UM2401

The ST-LINK/V2-1 programming and debugging tool is integrated on the STM32G071B-

DISCO Discovery board. Compared to ST-LINK/V2 the changes are listed below.

The new features supported on ST-LINK/V2-1 are:

• 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

These features are no more supported on ST-LINK/V2-1:

• SWIM interface

• Application voltage lower than 3 V

For all general information concerning debugging and programming features common between V2 and V2-1 refer to ST-LINK/V2 in-circuit debugger/programmer for STM8 and

STM32 User manual (UM1075) .

9.3.1 Drivers

Before connecting the STM32G071B-DISCO to a Windows ® (7, 8, 10) PC via USB, a driver for ST-LINK/V2-1 must be installed. It is available from the www.st.com

website.

Note:

If the STM32G071B-DISCO Discovery kit is connected to the PC before the driver is installed, there is a possibility that the Windows ® device manager reports some USB devices found on the STM32G071B-DISCO as Unknown . To recover from such a situation, after installing the dedicated driver downloaded from www.st.com

, the association of the

STM32G071B-DISCO Unknown USB device to the dedicated driver must be updated in the device manager manually.

It is recommended to proceed using the USB Composite Device line, as shown in Figure 8

.

Figure 8. USB Composite Device

9.3.2 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 lifetime of the ST-LINK/V2-1 product (for example new functionality, bug fixes, support for new microcontroller families), it is

14/36 UM2401 Rev 1

UM2401 Hardware layout and configuration recommended to visit the www.st.com

website before starting to use the STM32G071B-

DISCO board and periodically, to stay up-to-date with the latest firmware version.

The STM32G071B-DISCO Discovery board is designed to be powered either by a ST-

LINK/V2-1 connected to a PC or by the USB Type-C™ connectors connected to a USB

Type-C™ device. The power supply is automatically managed and there is no need to configure the STM32G071B-DISCO Discovery board. The source of power supply can be known by the microcontroller by the two signals STLK_ON and SMPS_ON corresponding respectively to the ST-LINK/V2-1 source and 5 V generated by the DC/DC converter since the board is power supplied by USB Type-C™ connection.

When the STM32G071B-DISCO Discovery board is only connected to a USB Type-C™ device, the V

BUS

power supply may vary from 3 V to 20 V (+/- 5%) and the embedded

SMPS circuitry is able to generate the necessary 5 V internal power supply from the whole

V

BUS

input range.

As soon as the power supply is present on the board by one of the above power sources, the green LD1 LED POWER 5V is lit on the front panel.

To program/debug the STM32G071RB microcontroller, the STM32G071B-DISCO

Discovery board must be connected with the ST-LINK/V2-1 connector to a PC, otherwise the ST-LINK/V2-1 microcontroller is forced to a RESET state while the power source is not provided by the ST-LINK/V2-1 connector. This feature is managed by the ST-LINK inhibition circuitry (Q1 and Q2 transistors).

Up to 3 clock sources can be used as described below:

• MCO clock from U5 STM32F103CB ST-LINK/V2-1 microcontroller (default configuration)

• X2, 32 KHz crystal for the STM32G071RB microcontroller

• X3, 8 MHz oscillator for the STM32G071RB microcontroller

9.7

The general reset of the STM32G071B-DISCO board is active low. The reset sources are:

• Reset button B1

• Embedded ST-LINK/V2-1 (with JP2 and SB4 fitted)

USB Type-C™ V

BUS

DC/DC converter to 5 V

The STM32G071B-DISCO Discovery board can be directly power supplied by V

BUS

USB Type-C™ devices. In that case, V

BUS

from

may vary from 3 to 20V (+/- 5%) and the internal

5 V is generated to supply the STM32 microcontroller and the 128 x 64 pixels OLED display respectively with two embedded 3.3V and 3.6V LDO regulators. The DC/DC converter is able to provide a total source current up to 500mA. It can be controlled and enabled by the

EN_SMPS pin from the STM32G071RB microcontroller.

UM2401 Rev 1 15/36

35

Hardware layout and configuration

9.8 128 x 64 pixels OLED display

UM2401

The STM32G071B-DISCO Discovery board uses a white 128 x 64 pixels OLED panel matrix, high contrast, SPI driven, to display messages and user menus. It is interactively controlled by the STM32G071RB microcontroller and gives status about USB Type-C™ modes and operating context.

9.9 IDD power consumption measurement

The user can measure IDD power consumption of the STM32G071RB microcontroller by connecting an ammeter between pins 1 and 2 from CN6. CN6 connector is not fitted by default but must be added by users. To be able to measure the power consumption of the microcontroller, SB6 must be removed beforehand.

9.10 4-way user joystick with selection button

All menus and configuration can be performed with the 4-way user joystick UP, DOWN,

LEFT, RIGHT and validation keys.

9.11 Power current sensing ICs

The STM32G071B-DISCO Discovery board can monitor the current/power consumptions of the USB Type-C™ lines CC1, CC2 and V

BUS controlled by an I 2

. These high accuracy sensors are directly

C communication bus with the STM32G071RB microcontroller. They monitor both shunt voltage drops and bus supply voltage via a 15mOhm shunt resistor serially mounted respectively with the CC1, CC2 and V

BUS

lines.

9.12 USB Type-C™ operating modes and connections

The STM32G071B-DISCO Discovery board can be connected different ways. There are 3 operating modes as described here below:

• Standalone mode (or Sink mode): STM32G071B-DISCO Discovery board is connected to a single external device with its USB Type-C™ Plug interface. It mainly displays source capabilities of the external device.

• Spy mode: STM32G071B-DISCO Discovery board is connected to two USB Type-C™ external devices via its Plug and Receptacle interfaces. This is a non-intrusive connection giving information about devices roles and power characteristics.

• Advanced user mode: STM32G071B-DISCO Discovery board is connected to two USB

Type-C™ external devices via its Plug and Receptacle interfaces and the connection to the ST-LINK/V2-1 allows advanced debug mode and interfacing with ST USB PD GUI.

9.13 USB Type-C™ Receptacle mechanical door lock

The user can connect the STM32G071B-DISCO Discovery board in standalone mode to a single USB Type-C™ device with the USB Plug cable. In that case, the USB Type-C™ receptacle mechanical door must be locked. A detection reed sensor (SW1) is connected to the STM32 microcontroller to identify if the mechanical door is locked or not. This

16/36 UM2401 Rev 1

UM2401 Hardware layout and configuration determines the operating mode in which the system is configured. When the mechanical door is unlocked, this allows connections of a USB Type-C™ connector on the receptacle side. A little magnet is located into the mechanical plastic door (shown below). Please notice that once the board has been removed out of its casing, the simulation of the magnet action can be performed by fitting SB16 (door locked corresponds to SB16 fitted and door unlocked to SB16 not fitted).

Figure 9 illustrates the positions of the mechanical door according to the locked and

unlocked modes.

Figure 9. Mechanical door system

/RFNHGPRGH1R

UHFHSWDFOHFRQQHFWLRQ

8QORFNHGPRGH

5HFHSWDFOH

FRQQHFWLRQDOORZHG

0DJQHW

06Y9

9.14 Virtual COM port

The serial interface USART3 (or USART4) is directly available as a virtual COM port of the

PC, connected to the ST-LINK/V2-1 USB connector CN1. The virtual COM port settings are configured as: 115200 b/s, 8 bits data, no parity, 1 stop bit, no flow control.

The RESET button B1 is located on the top side of the STM32G071B-DISCO Discovery board and can be accessed by inserting a pointed instrument to press the button through the casing hole. See the

Figure 10

below. This action resets the STM32G071RB microcontroller.

Five LEDs are located on the front panel of the STM32G071B-DISCO Discovery board and their description is given in the

Table 3

with LEDs located on the bottom side of the PCB.

Figure 11

describes the pictogram of the front panel and the associated LEDs.

UM2401 Rev 1 17/36

35

Hardware layout and configuration

Figure 10. Accessing the RESET button B1

UM2401

Reference

LD1

LD2

LD3

LD4

LD5

LD6

LD7

Color

Green

Red/Green

Red

Orange

Orange

Green

Green

Table 3. LEDs assignment and functions

Name Location

POWER 5V Top

ST-LINK COM Bottom

ST-LINK FAULT Bottom

SINK mode Top

SOURCE mode Top

SPY mode

CC

Top

Top

Function

5 V present onto the board

ST-LINK communication with host PC

ST-LINK Fault overcurrent

Attached to a power source

Attached to a device as source

SPY mode active

CC1 active line

Figure 11. LEDs and pictograms in front panel

/' /' /' /' /'

06Y9

18/36 UM2401 Rev 1

UM2401

10 Connectors

Connectors

10.1 CN1 User connectivity

CN1 is an 1x8-pin, 2.54mm pitch connector located on the right side of the STM32G071B-

DISCO Discovery board. A description is given below in the Table 4 . The default pins

assignment is shown on the second column of this table.

An alternate function, when available, can be selected by fitting a corresponding solder bridge described in the right column.

For example, users want to use DAC1_OUT1 functionalities of PA4 instead of USBPD2 features of PD2 (for pin 6 of CN1). In that case, SB12 must be fitted. Please notice that

SB12 fitting shorts PD2 and PD4 (see schematics for details), and then it is necessary to configure PD2 as an input floating pin to avoid any GPIO conflict.

Another example, SPI2 signals are required on CN1 for external communication with the

STM32G071B-DISCO Discovery board. Then SB12 and SB13 must be fitted to allow

SPI2_CLK and CPI2_MOSI available on CN1.

1

2

3

4

5

6

7

8

Pin number

Table 4. User connectivity CN1

Default assignment

VDD

5V_SMPS_VBUS

GND

PB2/SPI2_MISO/ADC_IN10

PD0/USBPD2_CC1

PD2/USBPD2_CC2

PB8/I2C1_SCL/USART3_TX

PB9/I2C1_SDA/USART3_RX

Alternate function

N/A

N/A

N/A

PA5/DAC1_OUT2/ADC_IN5

PB13/SPI2_CLK

PA4/DAC1_OUT1/ADC_IN4/SPI2_MO

SI

N/A

N/A -

-

SB12

AF when

SBxx fitted

-

-

-

SB11

SB13

10.2 CN5 USB Type-C™ Plug cable

CN5 is a 24-pin cable compatible with Universal Serial Bus Type-C™ specifications and

shown in Figure 12 . The pinout is described in Table 5 and

Table 6

.

UM2401 Rev 1 19/36

35

Connectors

Figure 12. CN7 USB Type-C™ 24-pin connector

UM2401

20/36

Table 5. CN5 USB Type-C™ Plug cable

Pin number Assignment

A12

B1

B2

B3

A8

A9

A10

A11

A4

A5

A6

A7

A1

A2

A3

B8

B9

B10

B11

B12

B4

B5

B6

B7

SBU1

VBUS

RX2_N

RX2_P

GND

GND

TX2_P

TX2_N

GND

TX1_P

TX1_N

VBUS

CC

DP1

DM1

VBUS

VCONN

NC

NC

SBU2

VBUS

RX1_N

RX1_P

GND

UM2401 Rev 1

UM2401 Connectors

A12

GND RX2_P RX2_N VBUS SBU1

GND TX2_P TX2_N VBUS VCONN

B1

A11

B2

A10

B3

Table 6. CN5 USB Type-C™ Plug cable pinout

A9

B4

A8

B5

A7

DM1

-

B6

A6

DP1

-

B7

A5

B8

A4

B9

A3

CC VBUS TX1_N TX1_P GND

SBU2 VBUS RX1_N RX1_P GND

B10

A2

B11

A1

B12

10.3 CN7 USB Type-C™ Receptacle connector

CN7 is a 24-pin connector compatible with Universal Serial Bus Type-C™ specifications and shown in

Figure 13

. Please notice that the mechanical door system must be unlocked to be

able connecting a USB Type-C™ cable on CN7. The pinout is described in Table 7 and

Table 8 .

Figure 13. CN7 USB Type-C™ 24-pin connector

Table 7. CN7 USB Type-C™ Receptacle connector

Pin number Assignment

A12

B1

B2

B3

A8

A9

A10

A11

A4

A5

A6

A7

A1

A2

A3

SBU1

VBUS

RX2_N

RX2_P

GND

GND

TX2_P

TX2_N

GND

TX1_P

TX1_N

VBUS

CC1

DP1

DM1

UM2401 Rev 1 21/36

35

Connectors UM2401

Table 7. CN7 USB Type-C™ Receptacle connector (continued)

Pin number Assignment

B8

B9

B10

B11

B12

B4

B5

B6

B7

VBUS

CC2

DP2

DM2

SBU2

VBUS

RX1_N

RX1_P

GND

A1 A2

Table 8. CN7 USB Type-C™ Receptacle connector pinout

A3 A4

GND TX1_P TX1_N VBUS

A5

CC1

A6

DP1

A7

DM1

A8 A9 A10 A11 A12

SBU1 VBUS RX2_N RX2_P GND

GND RX1_P RX1_N VBUS SBU2

B12 B11 B10 B9 B8

DM2

B7

DP2

B6

CC2

B5

VBUS TX2_N TX2_P GND

B4 B3 B2 B1

10.4 CN8 GPIO extension 1

CN8 connector is not fitted by default. CN8 is 2.54 pitch with 1x8-pin connector. The

description is given in Table 9

.

Table 9. CN8 GPIO extension 1

Pin number Assignment

4

5

6

7

8

1

2

3

PB0

PA15

PB1

PB3

PB4

PB5

PB14

GND

10.5 CN9 GPIO extension 2

CN9 connector is not fitted by default. CN9 is 2.54 pitch with 1x8-pin connector. The

description is given in Table 10

.

22/36 UM2401 Rev 1

UM2401 Connectors

Table 10. CN9 GPIO extension 2

Pin number Assignment

7

8

5

6

3

4

1

2

VDD

PD6

PC9

PC13

PD1

PD3

PD4

5V

10.6 USB Type-C™ tests points

Signals of USB Type-C™ can be monitored on tests points located on the bottom side of the

PCB. The tests points location is described in

Figure 14 .

Figure 14. USB Type-C™ tests points location

UM2401 Rev 1 23/36

35

Jumpers and solder bridges

11 Jumpers and solder bridges

UM2401

11.1 Jumpers

Here below are described in

Table 11 the jumper functions and their default status:

Table 11. Jumpers and description

Jumper

Name

Status

(1)

Function

JP1

JP2

ON

OFF

ON

OFF

1. Default status shown in bold

ST-LINK RESET

RESET TARGET MCU

Status

ST-LINK forced to RESET (no ST-LINK operation)

ST-LINK standard operation

ST-LINK RESET connected to TARGET MCU

ST-LINK RESET not connected to TARGET MCU

SB

Name

SB1

SB2

SB3

SB4

SB5

SB6

SB7

SB8

Here below are described in

Table 12 the solder bridges functions and their default status:

Table 12. Solder bridges and description

Status

(1)

Function Status

OFF

ON

OFF

ON

OFF

ON

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ST-LINK Power Supply

SWDIO TARGET MCU

SWCLK TARGET MCU

HW RESET TARGET MCU

MCO TARGET MCU

3V3 to TARGET MCU VDD

CC2 Line bypass

CC1 Line bypass

ST-LINK Power Supply ON

ST-LINK Power Supply OFF

ST-LINK SWDIO connected to TARGET MCU

ST-LINK SWDIO not connected to TARGET MCU

ST-LINK SWCLK connected to TARGET MCU

ST-LINK SWCLK not connected to TARGET MCU

ST-LINK RESET connected to TARGET MCU

ST-LINK RESET not connected to TARGET MCU

ST-LINK MCO connected to TARGET MCU

ST-LINK MCO not connected to TARGET MCU

3V3 connected to TARGET MCU VDD

3V3 not connected to TARGET MCU VDD

(2)

CC2 Line permanently connected to MCU

CC2 Line connection to MCU controlled by T2

CC1 Line permanently connected to MCU

CC1 Line connection to MCU controlled by T3

24/36 UM2401 Rev 1

UM2401 Jumpers and solder bridges

Table 12. Solder bridges and description (continued)

SB

Name

Status

(1)

Function Status

SB9

SB10

SB11

SB12

SB13

SB14

SB15

SB16

OFF

ON

OFF

ON

OFF

OFF

ON

OFF

ON

ON

OFF

ON

OFF

ON

OFF

ON

LTC3114 Converter mode

RD CC1

PA5 connected to CN1

PA4 connected to CN1

PB13 connected to CN1

USBPD2 DBCC1 Dead Battery mode Enabled

USBPD2 DBCC2 Dead Battery mode Enabled

SW1 Reed Sensor bypass

1. Default status shown in bold

2. SB6 must be OFF to allow power consumption measurement on CN6

Burst Mode control pin active

PWM Mode control pin active

RD CC1 (R56) permanently ON

RD CC1 (R56) controlled by T5

PA5 connected to CN1

PA5 not connected to CN1

PA4 connected to CN1

PA4 not connected to CN1

PB13 connected to CN1

PB13 not connected to CN1

USBPD2 DBCC1 Dead Battery mode Enabled

USBPD2 DBCC1 Dead Battery mode Disabled

USBPD2 DBCC1 Dead Battery mode Enabled

USBPD2 DBCC1 Dead Battery mode Disabled

SW1 is shorted (reed sensor permanently ON)

Standard operation SW1 controlled by magnet

UM2401 Rev 1 25/36

35

STM32G071B-DISCO known limitations UM2401

The STM32G071B-DISCO embeds an internal DC/DC converter on the V

BUS

line with high input filtering capacitors. When the Discovery is disconnected from the USB Type-C™ source device (Standalone or Sink Mode), the internal V

BUS may take some time to V

BUS

to reach the 0 V voltage level. For some USB Type-C™ devices which are sensitive to that condition before delivering again the V

BUS device and then expecting to have V

BUS

line near GND voltage level, the starting up of the

STM32G071B-DISCO can be delayed until the V

BUS

signal drops exponentially but it

as a source

and USB Type-C™ communication protocol have started. Consequently, even if the Discovery has been connected to the USB

Type-C™ source device, the V

BUS

power supply can be delivered later and then the

Discovery remains OFF until the V

BUS

from the source appears.

26/36 UM2401 Rev 1

UM2401Federal Communications Commission (FCC) and Industry Canada (IC) Compliance State-

13 Federal Communications Commission (FCC) and

Industry Canada (IC) Compliance Statements

13.1 FCC Compliance Statement

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.

Any changes or modifications to this equipment not expressly approved by

STMicroelectronics may cause harmful interference and void the user's authority to operate this equipment.

13.2 IC Compliance Statement

Industry Canada ICES-003 Compliance Label: CAN ICES-3 (A)/NMB-3(A).

13.3 Déclaration de conformité

Étiquette de conformité à la NMB-003 d'Industrie Canada: CAN ICES-3 (A)/NMB-3(A).

UM2401 Rev 1 27/36

35

Removal of the transparent backside cover for access to electronics

14 Removal of the transparent backside cover for access to electronics

UM2401

Completely unscrew the three screws as described Figure 15 below. All the jumpers,

connectors, solder bridges and tests points can be accessed on the bottom side of the printed circuit board.

Figure 15. Transparent backside cover removal

28/36 UM2401 Rev 1

UM2401

Appendix A Electrical schematics

Electrical schematics

This chapter provides design schematics for the STM32G071B-DISCO key features to help users to implement these features in application designs:

•

Figure 16: Overall schematics for the board on page 30

•

Figure 17: MCU and display on page 31

•

Figure 18: USB Type-C current sensing on page 32

•

Figure 19: Power Supply on page 33

•

Figure 20: ST-LINK V2.1 on page 34

UM2401 Rev 1 29/36

35

Figure 16. Overall schematics for the board

USB Type C

USB_typeC_CurrentSensing.SchDoc

I2C1_SDA

I2C1_SCL

ALERT_CC1

ALERT_CC2

ALERT_VBUS

ENCC1

ENCC2

RD_CC1

DOOR_SENSE

USBPD1_CC1

USBPD1_CC2

VBUS_P

ST-LINK v2.1

ST_LINK_V2_1.SchDoc

VCP_RX

VCP_TX

STLK_SWDIO

STLK_SWCLK

NRST

MCO

U_Power_Supply

Power_Supply.SchDoc

SMPS_ON

STLK_ON

EN_SMPS

VBUS_P

U_Mechanical

Mechanical.SchDoc

STM32G0 MCU and display

MCU_Display.SchDoc

I2C1_SDA

I2C1_SCL

ALERT_CC1

ALERT_CC2

ALERT_VBUS

ENCC1

ENCC2

RD_CC1

DOOR_SENSE

USBPD1_CC1

USBPD1_CC2

VCP_RX

VCP_TX

STLK_SWDIO

STLK_SWCLK

NRST

MCO

SMPS_ON

STLK_ON

EN_SMPS

Title:

Top

Project:

STM32G0 Discovery

Variant: DEFAULT

Revision:

Size: A4 Date: 29-10-18

Reference:

Sheet: 2

MB1378 of 7

Figure 17. MCU and display

EN_SMPS

SPI1_SCK

SPI1_MOSI

CS_DISP

USBPD1_CC1

RST_DISP

D/C_DISP

STLK_ON

SMPS_ON

STLK_SWDIO

STLK_SWCLK

I2C1_SCL

I2C1_SDA

ENCC1

ENCC2

RD_CC1

USBPD1_CC2

3V3_LDO

IDD

CN6

DNF

SB6

R37

100K

R35

0R

VDD

VDD

L2

R38

0R

USBPD1_DBCC1(PA9) and USBPD1_DBCC2(PA10) to GND

PA0

PA1

PA2

PA3

PA4

PA5

PA6

PA7

PA8

PA9

PA10

PA11

PA12

PA13

PA14

42

43

44

45

46

22

23

24

36

37

17

18

19

20

21

PA15 47

U8A

PA0

PA1

PA2

PA3

PA4

PA5

PA6

PA7

PA8

PA9

PA10

PA11

PA12

PA13

PA14-boot0

PA15

PC10

PC11

PC12

PC13

PC14-OSC32_IN

PC15-OSC32_OUT

PC0

PC1

PC2

PC3

PC4

PC5

PC6

PC7

PC8

PC9

PB0

PB1

PB2

PB3

PB4

PB5

PB6

PB7

PB8

PB9

PB10

PB11

PB12

62

63

30

31

32

27

28

29

57

58

59

60

61

PB13

PB14

PB15

33

34

35

PB8

PB9

PB10

PB11

PB12

PB13

PB14

PB15

PB0

PB1

PB2

PB3

PB4

PB5

PB6

PB7

STM32G071RBT6

PF0-OSC_IN

PF1-OSC_OUT

PF2-NRST

PD0

PD1

PD2

PD3

PD4

PD5

PD6

PD8

PD9

VREF+

8

6

7

U8 on bottom side

U8B

3V3_LDO

VBAT

VREF+

STM32G071RBT6

VSS

10

11

12

2

3

4

64

1

5

26

38

39

48

49

13

14

15

16

25

50

51

52

53

54

55

56

40

41

9

All SBs and test points on bottom side

PC0

PC1

PC2

PC3

PC4

PC5

PC6

PC7

PC8

PC9

PC10

PC11

PC12

PC13

PC14

PC15

NRST

JOY_SEL

JOY_LEFT

JOY_DOWN

JOY_RIGHT

JOY_UP

ALERT_VBUS

ALERT_CC1

ALERT_CC2

DOOR_SENSE

VCP_TX

VCP_RX

PD0

PD1

PD2

PD3

PD4

PD5

PD6

PD8

PD9

Dead battery mode enabled

SB14

SB15

SB5

PF0

PF1

MCO

R41

DNF

0R

PF2

R44

DNF

0R

R36

0R

R39

0R

X2

C39

5.6pF

NX3215SA-32.768K

C40

5.6pF

C42

DNF

3.9pF

DNF X3

NX3225GD-8.00M

C43

DNF

3.9pF

R32

470R

LD4

TO REC

1

3

RESET

B1

KMR7

C44

2

4

VDD VREF+

100nF

C45

100nF

C46

100nF

C47

4.7uF

C48

1uF

C49

10nF

5V_SMPS_VBUS VDD

JOY_SEL

JOY_LEFT

JOY_DOWN

JOY_RIGHT

JOY_UP

PB2

PD0

PD2

PB8

PB9

/SPI2_MISO/ADC_IN10

/USBPD2_CC1

/USBPD2_CC2

/I2C1_SCL/USART3_TX

/I2C1_SDA/USART3_RX

PA5

PA4

/DAC1_OUT2/ADC_IN5

/DAC1_OUT1/ADC_IN4/SPI2_MOSI

PB13 /SPI2_CLK

SB11

SB12

SB13

CN1

5

6

3

4

7

1

2

8

USER CONNECTIVITY

R33

470R

LD5

TO PLUG

C50 C51

OLED DISPLAY

U9

D/C#

D0

D1

D2

IREF

VCOMH

BS0

BS1

VSS

VLSS

C2P

C2N

C1P

C1N

VCC

VBAT

VDD

VCC

CS#

RES#

9OL9935701000

5

8

19

11

12

3

4

2

1

6

13

14

15

16

17

18

9

10

7

20

R61

180R

LD7

SOURCE

C52

3V3_LDO

C53 C54

1uF

1uF

R52

180R

LD6

SINK/SPY

PB0

PA15

PB1

PB3

PB4

PB5

PB14

C34

C35

CS_DISP

RST_DISP

D/C_DISP

SPI1_SCK

SPI1_MOSI

R40

620K

C41

4.7uF

USER JOYSTICK

R45

100R

5

B2

COMMON

2

CENTER

1

1

3

6

4

LEFT

DOWN

RIGHT

UP

MT-008A

Title:

MCU & Display

Project:

STM32G0 Discovery

Variant: DEFAULT

Revision:

Size: A4 Date: 29-10-18

3V3_LDO3V6_LDO

C37

1uF

Reference:

Sheet: 3

MB1378 of 7

C38

1uF

C36

4.7uF

VDD

CN8

1

DNF

4

5

6

2

3

7

8

5V

PD6

PC9

PC13

PD1

PD3

PD4

USER1

CN8 and CN9 on bottom side

CN9

1

DNF

4

5

6

2

3

7

8

USER2

4

2

3

6

Figure 18. USB Type-C current sensing

All SBs and test points on bottom side

CN7

RX2_N

RX2_P

TX2_N

TX2_P

GND

GND

GND

GND

DX07S024JJ2

DM1

DP1

DM2

DP2

RX1_N

RX1_P

TX1_N

TX1_P

VBUS

VBUS

VBUS

VBUS

CC1

CC2

SBU1

SBU2

A4

A9

B4

B9

A5

B5

A8

B8

A7

A6

B7

B6

B10

B11

A3

A2

A10

A11

B3

B2

A1

A12

B1

B12

USB TYPE-C PLUG & RECEPTACLE CONNECTION AND SHUNT FOR CURRENT SENSING

VBUS_N

CC1_N

CC2_N

VBUS_P

CC1_P

CC2_P

VBUS_P

D1_N

D1_P

R48

R49

R50

D1_N

D1_P

CC1_P

CC2_P

SBU1

SBU2

0.015R 1W 1%

0.015R 1W 1%

0.015R 1W 1%

SBU1

SBU2

ALL USB TYPE-C paired signals routed for 10Gbps

RX1_N

RX1_P

TX1_N

TX1_P

RX2_N

RX2_P

TX2_N

TX2_P

USB TYPE-C TEST POINTS

VBUS_P

D-

D+

VBUS

CC1

CC2

SBU1

SBU2

GND

A7

A6

B7

B6

A5

B5

A8

B8

A4

A9

B4

B9

CN5

VBUS

VBUS

VBUS

VBUS

CC

VCONN

SBU1

SBU2

DM1

DP1

NC

NC

B10

B11

A3

A2

RX1_N

RX1_P

TX1_N

TX1_P

A10

A11

B3

B2

RX2_N

RX2_P

TX2_N

TX2_P

A1

A12

B1

B12

GND

GND

GND

GND

USB Type-C Plug captive cable

USBPD1_CC2

USBPD1_CC1

I2C1_SCL

I2C1_SDA

3V3_LDO3V3_LDO

R46

1K

R47

1K

ALERT_VBUS

ADDRESS: 0x40

POWER/CURRENT SENSING ICs

3V3_LDO

VBUS

5

4

SCL

SDA BUS

11

U10

INA230

3

ALERT IN+

IN-

13

12

VBUS_P

VBUS_N

2

1

A0

A1

ALERT_CC1

ADDRESS: 0x41 3V3_LDO

3

2

1

5

4

CC1

3V3_LDO

SCL

SDA

ALERT

A0

A1

BUS

IN+

IN-

11

13

12

U11

INA230

CC1_P

CC1_N

USB CC LINES OVERVOLTAGE/PROTECTION AND ISOLATION

CC1_P

CC2_P

GND

U13

RD_CC1

R55

1M

3

G

5

2

8

6

D 1

R56

5K1

ENCC2

SB10

S 4

T5

STL6N2VH5

R62

0R

7

D3

BAT60JFILM

1

SW1

2

500mA Reed sensor

R57

0R

SB16

SB7

R59

100K

T2

STL6N2VH5

ENCC1

R58

0R

SB8

R60

100K

DOOR_SENSE

TRAP DOOR MAGNETIC DETECTION GPIO

T3

STL6N2VH5

ALERT_CC2

ADDRESS: 0x42

Title:

3V3_LDO

5

4

CC2

SCL

SDA BUS

11

U12

INA230

3

ALERT IN+

IN-

13

12

CC2_P

CC2_N

2

1

A0

A1

USB TypeC Current Sensing

Project:

Variant:

STM32G0 Discovery

Revision:

Size: A4

DEFAULT

Date: 29-10-18

Reference:

Sheet: 4

MB1378 of 7

VBUS_P

Figure 19. Power Supply

STLK_ON

SMPS_ON

5V_STLK

5V_SMPS_VBUS

All SBs and test points on bottom side

D1

STPS1L30A

D2

POWER SUPPLY SELECTION & 3V3 and 3V6 LDO

5V 6

U1

LD39050PU33R

VIN PG

1

EN VOUT

NC

C1

1uF

C2

100nF

3

4

5

R1

10K

R2

10K

STPS1L30A

R4

15K

R5

15K

R3

270R

LD1

POWER 5V

5V

C3

3V3_LDO

1uF

C4

100nF

C5

1uF

1

U2

LP2985IM5-3.6/NOPB

IN OUT

5

3

ON/OFF

BYPASS

GND

4

3V6_LDO

C6

10nF

C7

2.2uF

VBUS_P

Input Vin = 2.85V to 21Vdc

U14

ESDA25P35-1U1M

EN_SMPS

EN=1=>SMPS OFF

1

G

R63

47K

Q3

NDS7002A

3

D

2

S C13

10uF

C8

68nF

13

SW1

BST1

C14

1uF

R8

10K

R9

43K

10

14

4

VIN

PVIN

RUN

MODE

5

16

PROG

MODE

GND

C15

33nF SB9

VBUS SMPS CONVERTER TO 5V

L1

6.8

μ

H 4.5A

C9

68nF

SW2

BST2

12

PVOUT

LDO

PLDO

3

9

11

FB

VC

7

6

PGND

LTC3114-1

U3

R7

15K

C17

4.7nF

5V_SMPS_VBUS

Output Vout = 5Vdc 0.5A

R6

2M

C18

47pF

C16

4.7uF

R10

499K

R53

MODE

C10

47pF

C11

1uF

C12

22uF

R54

Title:

Power Supply

Project:

STM32G0 Discovery

Variant: DEFAULT

Revision:

Size: A4 Date: 29-10-18

Reference:

Sheet: 5

MB1378 of 7

Figure 20. ST-LINK V2.1

ST-LINK MCU

3V3_STLK

1

2

DNF

JP1

ST-LINK RESET

R17

100K

Board Ident: PC13=0

R15 10K

R16

3V3_STLK

3V3_STLK

C26

C19

10pF

1

100nF

X1

2

R20

R21

C20

10pF

NX3225GD-8.00M

OSC_IN

OSC_OUT

STM_RST

4K7

4K7

AIN_1

8

9

6

7

10

11

12

3

4

1

2

5

VBAT

PC13

PC14

PC15

OSCIN

OSCOUT

NRST

VSSA

3V3_LDOA

PA0

PA1

PA2

R14

100K

R11

4K7

D4

R12

2K7

R13

DNF

0R

BAT60JFILM

All SBs and test points on bottom side

5V

3V3_STLK

USB_RENUMn

STM_JTCK

3V3_LDO_2

VSS_2

JTMS/SWDIO

PA12

PA11

PA10

PA9

PA8

PB15

PB14

PB13

PB12

5V_USB_CHGR

D5

U5

STM32F103CBT6

3V3_STLK

5V_SMPS_VBUS

D6

31

30

29

28

27

26

25

36

35

34

33

32

STM_JTMS

USB_STLK_P

USB_STLK_N

LED_STLINK

PWR_ENn

T_JTMS

T_JTCK

T_SWDIO_IN

R19

100R

To be placed near STM32F103

R18

MCO

100R

DNF C27

20pF

3V3_STLK

VCP_RX

VCP_TX

R22

R23

0R

0R

CN2

Header 2x1

STLK_TX

STLK_RX

1

2

DNF

3V3_STLK

C28

100nF

C29

100nF

C30

100nF

C31

100nF

ST-LINK USB CONNECTOR

3V3_STLK

9013-SOT23

T1

1 R25

R27

100R

36K

U5 on bottom side

STLINK_LED

USB_RENUMn

ST-LINK

CN3

VBUS

DM

DP

ID

GND

Shield

Shield

Shield

Shield

EXP

EXP

USB_uB_105017-0001

8

9

6

7

10

11

1

4

5

2

3

R29

1K5

USB_STLK_ID

R34

100K

R28 10K

5V_USB_CHGR

USB_STLK_N

USB_STLK_P

1

2

3

U7

IO1

GND

IO2

USBLC6-2P6

IO_1

VBUS

IO_2

6

5

4

ESD PROTECTION SHOULD BE CLOSE TO THE CONNECTOR

3V3_STLK

ST-LINK DFU

COM

LD2

Red

1

4

2

R24

330R

R26

3

330R

Green

LD_BICOLOR_CMS

SWCLK

STM_JTCK

3V3_STLK

DNF

CN4

Header 4x1

SWDIO

STM_JTMS

LED_STLINK

Must be on a border of the PCB.

ST-LINK POWER 3V3 / 150mA

BAT60JFILM

BAT60JFILM

T_JTMS

T_JTCK

T_NRST

5V_USB_CHGR

R42

100K

SB1

SB2

SB3

SB4

R43

22K

C21

1uF

1

1

U4

Vin

LD3985M33R

Vout

5

3

INH

GND BYPASS

C22

100nF

C25

10nF

5V

JP2

R51

100K

3V3_STLK

C23

1uF

C24

100nF

PA13

PA14

NRST

STLK_SWDIO

STLK_SWCLK

NRST

JP2 on bottom side

Shunt Fitted

ST LINK Inhibition circuitry

Q1

BC817-25

Title:

ST-LINK V2.1

Project:

STM32G0 Discovery

Variant: DEFAULT

Revision:

Size: A4 Date: 29-10-18

1

STM_RST

Q2

BC817-25

5V_USB_CHGR

C32

1uF

PWR_ENn

ST LINK USB Power switch 5V / 1.2A

ST-LINK FAULT

LD3

R31

680R

5

RED

U6

STMPS2141STR

IN OUT

1

4 3

R30

10K

EN FAULT

GND

Reference:

Sheet: 6

MB1378 of 7

5V_STLK

C33

100nF

UM2401

Date

14-Dec-2018

Table 13. Document revision history

Revision Changes

1 Initial version

Revision history

UM2401 Rev 1 35/36

35

UM2401

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