ST STM32L053 Manuale utente

September 2021 UM1775 Rev 4 1/39

UM1775

User manual

Discovery kit with STM32L053C8 MCU

Introduction

The STM32L053 Discovery kit (32L0358DISCOVERY) helps the user to discover the full

feature range of the STM32L0 Series and develop applications. It is based on the

STM32L053C8T6 microcontroller and includes an embedded ST-LINK/V2-1

debugger/programmer, linear touch sensor, touchkeys, IDD current measurement, 2.13” E-

paper display, NFC connector for the PLUG-CR95HF-B board, LEDs, push-buttons and a

USB Mini-B connector.

The STM32L053 Discovery kit comes with a comprehensive STM32 software HAL library

with various packaged software examples available in the STM32CubeL0 MCU Package,

as well as direct access to Arm®Mbed™ on-line resources at https://os.mbed.com/.

Figure 1. STM32L053 Discovery board

Picture is not contractual.

www.st.com

Contents UM1775

2/39 UM1775 Rev 4

Contents

1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.1 Codification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3 Development environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.1 System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

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

4 Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5 Quick start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.1 Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

6 Hardware layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

6.1 Embedded ST-LINK/V2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

6.1.1 Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

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

6.1.3 VCP configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

6.1.4 Using ST-LINK/V2-1 to program/debug the STM32L053C8T6 on board .

6.1.5 Using ST-LINK/V2-1 to program/debug an external

STM32 application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

6.2 Power supply and power selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

6.2.1 Power supply input from the USB connector . . . . . . . . . . . . . . . . . . . . . 18

6.2.2 External power supply inputs: 5V_IN or USB USER CN3 . . . . . . . . . . . 19

6.3 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

6.4 Pushbuttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

6.5 NFC connector for PLUG-CR95HF-B board . . . . . . . . . . . . . . . . . . . . . . 20

6.6 Electronic paper display (EPD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

6.7 JP4 (IDD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

6.8 BOOT0 configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

6.9 Linear touch sensor / touchkeys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

6.10 USB device support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

UM1775 Rev 4 3/39

UM1775 Contents

6.11 USART configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

6.12 OSC clock supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

6.13 OSC 32 KHz clock supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

6.14 Solder bridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.15 Extension connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

7 Mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

8 32L0358DISCOVERY Discovery kit information . . . . . . . . . . . . . . . . . . 33

8.1 Product marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

8.2 32L0358DISCOVERY product history . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

8.2.1 Product identification 32L0538DISCO/ . . . . . . . . . . . . . . . . . . . . . . . . . 34

8.2.2 Product identification DK32L0538$AU1 . . . . . . . . . . . . . . . . . . . . . . . . 34

8.3 Board revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

8.3.1 MB1143 revision B-01 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

8.3.2 MB1143 revision B-03 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

8.4 Board known limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

8.4.1 MB1143 revision B-01 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

8.4.2 MB1143 revision B-03 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Appendix A Federal Communications Commission (FCC)

and ISED Canada Compliance Statements . . . . . . . . . . . . . . . . . . . 35

A.1 FCC Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

A.1.1 Part 15.19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

A.1.2 Part 15.21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

A.1.3 Part 15.105 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

A.2 ISED Compliance Statement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Appendix B CE conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

List of tables UM1775

4/39 UM1775 Rev 4

List of tables

Table 1. Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Table 2. Codification explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Table 3. ON/OFF conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Table 4. Jumper states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Table 5. Debug connector CN5 (SWD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Table 6. NFC connector pinout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Table 7. Solder bridges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 8. Extension connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 9. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

UM1775 Rev 4 5/39

UM1775 List of figures

List of figures

Figure 1. STM32L053 Discovery board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 2. STM32L053 Discovery board hardware block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 3. Top layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 4. Bottom layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 5. Updating the list of drivers in device manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 6. STM32L053 Discovery board connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 7. ST-LINK/V2-1 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 8. NFC board plugged on the STM32L053 Discovery board . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 9. Jumper JP4 in position OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 10. Jumper JP4 in position ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 11. No Jumper on JP4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 12. STM32L053 Discovery board mechanical drawing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Features UM1775

6/39 UM1775 Rev 4

1 Features

The STM32L053 Discovery kit offers the following features:

•STM32L053C8T6 microcontroller with 64 Kbytes of Flash memory and 8 Kbytes of

RAM, in an LQFP48 package

•2.13" E-paper display, 122×250 pixels

•USB 2.0 FS

•One linear touch sensor or four touchkeys

•Reset and user push-buttons

•Four LEDs:

– LD1 (red/green) for USB communication

– LD2 (red) for 3.3 V power on

– Two user LEDs: LD3 (green), LD4 (red)

•IDD current measurement

•Board connectors:

– USB Mini-B connector

– NFC expansion connector for the PLUG-CR95HF-B daughterboard

– 2.54 mm pitch expansion header for direct access to various features of the

STM32L053C8T6 microcontroller and easy probing of the LQFP48 I/Os

•Flexible power-supply options: ST-LINK, USB VBUS, or external sources

•External application power supply: 3 V and 5 V

•Comprehensive free software libraries and examples available with the STM32CubeL0

MCU Package

•On-board ST-LINK/V2-1 debugger/programmer with USB re-enumeration capability:

mass storage, Virtual COM port, and debug port

•Support of a wide choice of Integrated Development Environments (IDEs) including

IAR Embedded Workbench®, MDK-ARM, STM32CubeIDE, and Mbed Studio

UM1775 Rev 4 7/39

UM1775 Ordering information

2 Ordering information

To order the 32L0358DISCOVERY Discovery kit, refer to Table 1. Additional information is

available from the datasheet and reference manual of the target microcontroller.

2.1 Codification

The meaning of the codification is explained in Table 2.

Table 1. Ordering information

Order code Board reference Target STM32

STM32L0538-DISCO MB1143 STM32L053C8T6

Table 2. Codification explanation

STM32L0XXY-DISCO Description Example: STM32L0538-DISCO

STM32L0 MCU series in STM32 32-bit Arm Cortex

MCUs STM32L0 Series

XX MCU product line in the series STM32L0x3 includes the

STM32L053xx MCUs

YSTM32 Flash memory size:

– 8 for 64 Kbytes 64 Kbytes

DISCO Discovery kit Discovery kit

Development environment UM1775

8/39 UM1775 Rev 4

3 Development environment

3.1 System requirements

•Multi.OS support: Windows®10, Linux® (a) 64-bit, or macOS® (b)

•USB Type-A or USB Type-C®to Mini-B cable

3.2 Development toolchains

•IAR Systems - IAR Embedded Workbench® (c)

•Keil®- MDK-ARM(c) (d)

•STMicroelectronics - STM32CubeIDE

•Arm®- Mbed Studio(e) (f) (g)

4 Conventions

Table 3 provides the definition of some conventions used in the present document.

a. Linux®is a registered trademark of Linus Torvalds.

b. macOS®is a trademark of Apple Inc. registered in the U.S. and other countries.

All other trademarks are the property of their respective owners.

c. On Windows®only.

d. Free MDK-ARM for Arm®Cortex®-M0/M0+ cores.

e. Arm and Mbed are registered trademarks or trademarks of Arm Limited (or its subsidiaries) in the US and

or elsewhere.

f. Refer to the os.mbed.com website and to the “Ordering information” section to determine which order

codes are supported.

g. All other trademarks are the property of their respective owners.

Table 3. ON/OFF conventions

Convention Definition

Jumper JPx ON Jumper fitted

Jumper JPx OFF Jumper not fitted

Solder bridge SBx ON SBx connections closed by solder

Solder bridge SBx OFF SBx connections left open

UM1775 Rev 4 9/39

UM1775 Quick start

5 Quick start

The STM32L053 Discovery kit is a low-cost and easy-to-use development kit to quickly

evaluate and start a development with the STM32L053C8T6 ultra-low-power microcontroller

in the STM32L0 Series.

Before installing and using the product, accept the Evaluation Product License Agreement

from the www.st.com/stm32l0-discovery webpage.

For more information on the STM32L053 Discovery kit, visit the www.st.com/stm32l0-

discovery webpage.

5.1 Getting started

Refer to the sequence of operations described on the product packaging.

Hardware layout UM1775

10/39 UM1775 Rev 4

6 Hardware layout

The STM32L053 Discovery board is designed around the STM32L053C8T6 microcontroller

in a 48-pin LQFP package.

Figure 2 illustrates the connections between the STM32L053C8T6 and its peripherals (ST-

LINK/V2-1, linear touch sensor, touchkeys, IDD current measurement, 2.13” E-paper

display, NFC connector for PLUG-CR95HF-B board, LEDs, push-buttons and an USB Mini-

B connector).

Figure 3 and Figure 4 help users to locate these features on the STM32L053 Discovery

board.

Figure 2. STM32L053 Discovery board hardware block diagram

Embedded

ST-LINK/V2-1

STM32L053C8T6

I/O I/O

RESET

USB ST-LINK

Mini-B

SWDHeader

LEDs

LD3, LD4

Linear

touch sensor

NFC

connector

RESET

USER

IDD current

measurement

I/O

Header

MSv39739V2

E-paper display

I/O

USB USER

Mini-B

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