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June 2014 DocID026429 Rev 2 1/39

UM1775User manual

Discovery kit for STM32L0 series with STM32L053C8 MCU

Introduction

The STM32L053 discovery kit (32L0358DISCOVERY) helps you to discover the full features of the STM32L0 series and to develop your applications. It is based on an STM32L053C8T6 and includes an ST-LINK/V2-1 embedded debug tool interface, linear touch sensor, touch keys, IDD current measurement, 2.04” E-paper display, NFC connector for PLUG-CR95HF-B board, LEDs, pushbuttons and an USB mini-B connector.

Figure 1. STM32L053 discovery board

www.st.com

http://www.st.com

Contents UM1775

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Contents

1 Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2 Ordering and product information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.1 Order code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4 Hardware layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.1 Embedded ST-LINK/V2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.1.1 Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.1.2 ST-LINK/V2-1 firmware upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.1.3 Using ST-LINK/V2-1 to program/debug the STM32L053 on board . . . 14

4.1.4 Using ST-LINK/V2-1 to program/debug an external STM32 application 15

4.2 Power supply and power selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.2.1 Power supply input from the USB connector . . . . . . . . . . . . . . . . . . . . . 17

4.2.2 External power supply inputs: 5V_IN or USB USER CN3 . . . . . . . . . . . 17

4.3 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.4 Pushbuttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.5 NFC connector for PLUG-CR95HF-B board . . . . . . . . . . . . . . . . . . . . . . 19

4.6 Electronic Paper Display (EPD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.7 JP4 (Idd) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.8 BOOT0 configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.9 Linear touch sensor / touch keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.10 USB device support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4.11 USART configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4.12 OSC clock supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4.13 OSC 32 kHz clock supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

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

4.15 Extension connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

5 Mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

6 Electrical schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

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UM1775 Contents

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

List of tables UM1775

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List of tables

Table 1. ON/OFF conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Table 2. Jumper states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Table 3. Debug connector CN5 (SWD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Table 4. NFC connector pin-out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Table 5. Solder bridges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Table 6. Extension connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Table 7. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

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UM1775 List of figures

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List of figures

Figure 1. STM32L053 discovery board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Figure 2. STM32L053 discovery hardware block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Figure 3. Top layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Figure 4. Bottom layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Figure 5. Updating the list of drivers in device manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Figure 6. STM32L053 discovery board connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Figure 7. ST-LINK connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Figure 8. NFC board plugged on STM32L053 discovery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Figure 9. Jumper on position OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Figure 10. Jumper on position ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Figure 11. No Jumper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Figure 12. STM32L053 discovery board mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31Figure 13. STM32L053 discovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32Figure 14. ST-LINK/V2-1 (SWD only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33Figure 15. STM32L053C8T6 MCU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34Figure 16. Electronic paper display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35Figure 17. Linear touch sensor, NFC, USB and pushbutton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36Figure 18. IDD measurement / MFX (Multi Function eXpander) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Conventions UM1775

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1 Conventions

Table 1 provides the definition of some conventions used in the present document.

Table 1. ON/OFF conventions

Convention Definition

Jumper JPx ON Jumper fitted

Jumper JPx OFF Jumper not fitted

Solder bridge SBx ON SBx connections closed by Solder

Solder bridge SBx OFF SBx connections left open

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UM1775 Ordering and product information

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2 Ordering and product information

The STM32L053 discovery is a low-cost and easy-to-use development kit to quickly evaluate and start a development with an STM32L0 series microcontroller.

Before installing and using the product, please accept the Evaluation Product License Agreement from www.st.com/stm32l0-discovery.

For more information on the STM32L053 discovery board and for demonstration software, visit www.st.com/stm32l0-discovery.

2.1 Order code

To order the STM32L053 discovery kit, use the order code: STM32L0538-DISCO.

Features UM1775

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3 Features

The STM32L053 discovery board offers the following features:

• STM32L053C8T6 microcontroller featuring 64 KB of flash memory, 8 KB of RAM in an LQFP48 package

• On-board ST-LINK/V2-1 with selection mode switch to use the kit as a standalone ST-LINK/V2-1 (with SWD connector for programming and debugging)

• USB re-enumeration capability: three different interfaces supported on USB

– Virtual com port

– Mass storage

– Debug port

• Board power supply: through USB bus or from an external 5 V supply voltage

• External application power supply: 3 V and 5 V

• One linear touch sensor or four touch keys.

• IDD current measurement.

• 2.04” E-paper Display, 172x72 pixels.

• NFC connector for PLUG-CR95HF-B board.

• USB USER with Mini-B connector.

• Four LEDs:

– LD1 (red/green) for USB communication

– LD2 (red) for 3.3 V power on

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

• Two pushbuttons (user and reset)

• Extension header for LQFP48 I/Os for a quick connection to the prototyping board and easy probing.

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UM1775 Hardware layout

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4 Hardware layout

The STM32L053 discovery board has been 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, touch keys, IDD current measurement, 2.04” E-paper display, NFC connector for PLUG-CR95HF-B board, LEDs, pushbuttons and an USB mini-B connector).

Figure 3 and Figure 4 help you to locate these features on the STM32L053 discovery board.

Figure 2. STM32L053 discovery hardware block diagram

Hardware layout UM1775

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Figure 3. Top layout

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Figure 4. Bottom layout


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4.1 Embedded ST-LINK/V2-1

The ST-LINK/V2-1 programming and debugging tool is integrated on the STM32L053 discovery board.

The embedded ST-LINK/V2-1 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.

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:

– SWIM interface

– 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 2):

• Program/debug the MCU on board (Section 4.1.3).

• Program/debug an MCU in an external application board using a cable connected to SWD connector CN5 (Section 4.1.4).

4.1.1 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 STM32L053 discovery board is connected to the PC before the driver is installed, some discovery interfaces may be declared as “Unknown” in the PC device manager. In this case the user must install the driver files (Figure 5), and from the device manager update the driver of the connected device.

Note: Prefer using the “USB Composite Device” handle for a full recovery.

Table 2. Jumper states

Jumper state Description

Both CN4 jumpers ON ST-LINK/V2-1 functions enabled for on board programming (default)

Both CN4 jumpers OFFST-LINK/V2-1 functions enabled for application through external CN5 connector (SWD supported)

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Figure 5. Updating the list of drivers in device manager

4.1.2 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 at the board delivery, then periodically in order to stay up-to-date with the latest firmware version.


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4.1.3 Using ST-LINK/V2-1 to program/debug the STM32L053 on board

To program the STM32L053 on board, simply plug in the two jumpers on CN4, as shown in Figure 6 in red, but do not use the CN5 connector as that could disturb communication with the STM32L053C8T6 of the STM32L053 discovery board.

Figure 6. STM32L053 discovery board connections

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4.1.4 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 2 jumpers from CN4 as shown in Figure 7 and connect your application to the CN5 debug connector according to Table 3.

Note: SB13, must be OFF if you use CN5 pin 5 (NRST) in your external application.

Table 3. Debug connector CN5 (SWD)

Pïn CN5 Designation

1 VDD_TARGET VDD from application

2 SWLCK SWD clock

3 GND Ground

4 SWDIO SWD data input/output

5 NRST RESET of target MCU

6 SWO Reserved


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Figure 7. ST-LINK connections

4.2 Power supply and power selection

The power supply is provided either by the host PC through the USB cable, or by an external 5 V power supply.

The STM32L053 discovery board requires to the Host PC 300mA, but around 90mA is needed for its demo, 100mA for an extension board and a safety margin of 100mA.

The D3, D4 and D6 diodes protect the 5 V pins from external power supplies:

• 5 V and 3 V can be used as output power supplies when an extension board is connected to pins P2 and P3.

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In this case, the 5V_O and 3V_O pins deliver a 5 V or 3.3 V power supply and the power consumption of the extension board must be lower than 100 mA.

• 5 V can also be used as input power supplies, e.g. when the USB connector is not connected to the PC. (5V_I pin of P3 Header) In this case, the STM32L053 discovery 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.

4.2.1 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 STM32L053 discovery board and extension board can be powered from the ST-LINK USB connector CN2 (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 STM32L053 discovery 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 powered and the red LED LD2 is turned ON, thus the STM32L053 discovery board and its extension board 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 LD2 remains turned OFF. In such case it is mandatory to use an external power supply as explained in the next chapter.

Warning: If the maximum current consumption of the STM32L053 discovery and its extension boards exceeds 300 mA, it is mandatory to power the STM32L053 discovery using an external power supply connected to 5V_IN.

Note: In case of this board is powered by an USB charger or USB battery then there is no USB enumeration so the led LD1 remains OFF permanently and the target MCU is not powered. In this specific case the jumper JP2 needs to be ON to allow target MCU to be powered anyway. This is a special use without enumeration and JP2 is not soldered. To use this optional power supply, solder a 2 pins header in JP2 and set a jumper.

4.2.2 External power supply inputs: 5V_IN or USB USER CN3

The external power source 5V_IN or USB USER CN3 is automatically detected, in this case the current consumption of STM32L053 discovery board and extension board may exceed 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 5V_IN or USB USER CN3 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 external power source to 5V_IN or USB USER CN3.

2. Power on the external power supply 5V_IN or USB USER CN3.

3. Check that LD2 is turned ON.

4. Connect the PC to USB connector CN2.

If this order is not respected, the board may be supplied by VBUS first then by 5V_IN or USB USER CN3, and the following risks may be encountered:


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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 JP2 must be OFF) so there is a 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 LD2 remains OFF).

4.3 LEDs

• LD1 COM: LD1 default status is red. LD1 turns to green to indicate that communications are in progress between the PC and the ST-LINK/V2-1.

• LD2 PWR: The red LED indicates that the board is powered.

• User LD3: The green LED is a user LED connected to the I/O PB4 of the STM32L053C8T6.

• User LD4: The red LED is a user LED connected to the I/O PA5 of the STM32L053C8T6.

4.4 Pushbuttons

• B1 USER: User and Wake-Up button connected to the I/O PA0 of the STM32L053C8T6.

• B2 RESET: The pushbutton connected to NRST is used to RESET the STM32L053C8T6.

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4.5 NFC connector for PLUG-CR95HF-B board

A NFC (Near Field Communication) transceiver board can be connected to the STM32L053 Discovery board, for example the PLUG-CR95HF-B board.

The NFC board is plugged in connector CN1 of STM32L053 Discovery board as following:

Figure 8. NFC board plugged on STM32L053 discovery


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The NFC board can be accessed in SPI or UART mode.

4.6 Electronic Paper Display (EPD)

The STM32L053 Discovery includes an E-Paper PD with High contrast, High reflectance and Ultra wide viewing angle.

This display is a TFT active matrix electrophoretic display. The 2.04" active area contains 172x72 pixels, and has 1-bit and 2-bit full display capabilities. An integrated circuit contains buffers, interface, control logic, oscillator, DC-DC, Etc... (For more information on E-Paper GDE021A1, see www.good-display.com)

The STM32L053C8T6 controls this peripheral and is able to switch off its power supply. (See Section 6: Electrical schematics)

4.7 JP4 (Idd)

Jumper JP4, labeled Idd, allows the consumption of STM32L053C8T6 to be measured directly by a module onboard able to measure from 100 nA to 50 mA or by removing the jumper and connecting an ammeter.

• Jumper on position OFF: STM32L053C8T6 is powered (default).

Figure 9. Jumper on position OFF

Table 4. NFC connector pin-out

CN1 pin NFC signals STM32L053C8T6 Description

1NFC_IRQOUTN or UART1_TX

PB7Interrupt output for NFC connected to STM32L053C8T6 UART1 RX

2NFC_IRQINN or UART1_RX

PB6Interrupt input for CR95HF connected to STM32L053C8T6 UART1 TX

3 NFC_NSS PB12 SPI slave select

4 NFC_MISO PB14 SPI data, slave output

5 NFC_MOSI PB15 SPI data, slave input

6 NFC_SCK PB13 SPI serial clock

7 +3V3 Main power supply/power supply for RF drivers

8 GND Ground

http://www.good-display.com

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• Jumper on position ON: a module onboard is designed to measure from 100 nA to 50 mA by using several MOSFET and switching automatically depending the read value.

Figure 10. Jumper on position ON

• NO Jumper on JP4: an ammeter must be connected to measure the STM32L053C8T6 current through pin 1 and 2 (if there is no ammeter, the STM32L053C8T6 is not powered).

Figure 11. No Jumper

4.8 BOOT0 configuration

BOOT0 is at level “0” through a pull-down R65. If you want to set BOOT0 at level “1”, it can be configured by setting a jumper between P2.6 (BOOT0) and P2.5 (VDD).

Note: If you need to set BOOT0 at level "1" continuously, then unsolder the resistor R65 to avoid a consumption of 6 mA while connecting pin P2.6 (BOOT0) and P2.5 (VDD) with a jumper or with a wire.

4.9 Linear touch sensor / touch keys

To demonstrate touch sensing capabilities, the STM32L053 discovery includes a linear touch sensor which can be used either as a 3-position linear touch sensor or as 4 touch keys. Both functions are illustrated in the demonstration software.


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3 pairs of I/O ports are assigned to the linear touch sensor / touch keys. Each pair must belong to the same analog switch group:

• PA2, PA3 (group 1)

• PA6, PA7 (group 2)

• PB0, PB1 (group 3)

To minimize the noise, these pairs are dedicated to the linear touch sensor and the touch keys and are not connected to external headers. To design a touch sensing application, refer to the following documentation and firmware:

• For details concerning I/O ports, refer to the STM32L053C8T6 datasheet.

• For information on software development, see DISCOVER application software on www.st.com/stm32l0-discovery.

• For more detail concerning touch sensing application design and layout, refer to AN2869 -Guidelines for designing touch sensing applications.

• STM32 touch sensing library available from www.st.com/stm32l0-discovery.

The STM32L053C8T6 MCU controls the linear touch sensor and the touch keys.

4.10 USB device support

The STM32L053C8T6 MCU is also used to drive the second USB mini-B connector (USB USER) which allows the board to be used as a USB Device. The STM32L053 discovery can then act as a USB joystick, mouse, or other similar device. If both USBs are connected, diodes D3 and D4 protect the board and use the power from the USB ST-LINK or USB USER. Section 4.2.2: External power supply inputs: 5V_IN or USB USER CN3.

The board can be powered through this USB USER connector, in which case LED2 PWR lights up, LED1 COM blinks and it can run an application in standalone mode.

The STM32L053C8T6 MCU controls the USB USER through PA11 and PA12.

4.11 USART configuration

The USART1 interface available on PA9 and PA10 of the STM32L053C8T6 can be connected to ST-LINK MCU to use the Virtual Com Port function.

By default the USART1 communication between the target STM32L053C8T6 and ST-LINK MCU is not enabled.

To use the Virtual Com Port function with:

• The onboard STM32L053C8T6, then set SB2 and SB3 ON. (SB14,15 must be OFF)

• An external MCU then remove solder from SB2 and SB3, solder a 2 pins header on JP3, then you can connect RX and TX of the external MCU directly to RX and TX of JP3. (for more details see Section 6: Electrical schematics)

4.12 OSC clock supply

If PH0 is only used as GPIOs instead of as a clock, then SB21 is closed. (SB20 must be open)

http://www.st.com/stm32l0-discovery

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MCO from ST-LINK (from MCO of the STM32F103CBT6) This frequency cannot be changed, it is fixed at 8 MHz and connected to PH0-OSC_IN of the STM32L053C8T6. The configuration needed is:

– SB20 closed and SB21 open

Oscillator from external PH0 (from external oscillator through pin 7 of the P3 connector) The configuration needed is:

– SB21 closed and SB20 open

Note: Please refer to the AN2867 for oscillator design guide for STM32 microcontrollers.

4.13 OSC 32 kHz clock supply

If PC14 and PC15 are only used as GPIOs instead of as a clock, then SB18 and SB19 are closed and R70 and R71 are removed.

HSE Oscillator onboard from X2 crystal (not provided)

For typical frequencies and its capacitors and resistors, please refer to the STM32L053C8T6 Datasheet. The configuration needed is:

– SB18, SB19 open

– X2, R70, R71, C47, C50 soldered

Oscillator from external PC14 (from external oscillator through pin 5 of the P3 connector) the configuration needed is:

– SB18 closed

– SB19 open

– R70 removed

Note: Please refer to the AN2867 for oscillator design guide for STM32 microcontrollers.


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4.14 Solder bridges

Table 5. Solder bridges

Bridge State(1) Description

SB18, 19 (X2 crystal)OFF

X2, C47, C50, R70 and R71 provide a clock. PC14, PC15 are disconnected from P3.

ON PC14, PC15 are connected from P3. Remove only R70 and R71

SB7,8,9,12 (default) ON Reserved, do not modify

SB4,5,6,11 (reserved) OFF Reserved, do not modify

SB2,3 (reserved) OFF Reserved, do not modify

SB29 (B2-RESET)ON B2 Push Button is connected to NRST of STM32L053C8T6

OFF B2 Push Button is not connected to NRST of STM32L053C8T6

SB22 (B1-USER)ON B1 Push Button is connected to PA0

OFF B1 Push Button is not connected to PA0

SB14, 15 (RX, TX)OFF

PA2, PA3 of STM32F103CBT6 are not connected to PB4, PB3 of STM32L053C8T6

ON PA2, PA3 of STM32F103CBT6 are connected to PB4, PB3 of STM32L053C8T6

SB16, 17 (USB_USER)

OFF USB1_DP and USB1_DM are dedicated to the USB USER connector CN3

ONUSB1_DP is connected to PA12 and USB1_DM is connected to PA11. Both are available as GPIO on P2, P3 headers.

SB23,24,25,26,27,28 (touch sensor)

OFF PA2, PA3, PA6, PA7, PB0, PB1 are dedicated to touch sensor.

ON PA2, PA3, PA6, PA7, PB0, PB1 are available as GPIO on P2, P3 headers.

SB1 (ST-LINK PWR)ON ST-LINK module is powered

OFF ST-LINK module is not powered

SB21 (OSC_IN)OFF

Clock signal from header P3.7 is connected to OSC_IN of STM32L053C8T6 or PH0 is available as GPIO. SB20 must be OFF

ON No connection between header P3.7 and PH0 of STM32L053C8T6

SB13 (NRST)ON

T_NRST signal from connector CN5 and STM32F103CBT6, is connected to NRST of STM32L053C8T6

OFF T_NRST signal is not connected

SB10 (STM_RST)OFF No incidence on NRST signal of STM32F103CBT6

ON NRST signal of STM32F103CBT6 is connected to GND

SB20 (MCO) ONMCO clock signal from STM32F103CBT6 is connected to OSC_IN of STM32L053C8T6. SB21 must be OFF

OFF MCO signal of STM32F103CBT6 is not used.

1. Default value is in bold.

DocID026429 Rev 2 25/39


38

4.15 Extension connectors

The male headers P2 and P3 can connect the STM32L053 discovery board to a standard prototyping/wrapping board. STM32L053C8T6 GPI/Os are available on these connectors. P2 and P3 can also be probed by an oscilloscope, logical analyzer or voltmeter.

Table 6. Extension connectors

MCU pin Board function

Mai

n f

un

ctio

n

LQ

FP

48 p

in n

um

.

SY

ST

EM

VC

P

Pu

shB

utt

on

s

LE

D

NF

C C

R95

HF

-B

US

B U

SE

R

Lin

ear

tou

ch

sen

sor

E-p

ap

er D

isp

lay

Idd

Me

asu

re

Fre

e I/

O

Po

wer

Su

pp

ly

P2

P3

CN

1

CN

3

SB

x(1

)

BOOT0 44

BO

OT

0

- - - - - - - - - - 6 - - - -

NRST 7

NR

ST

- - - - - - - - - - - 9 - - -

PA0 10 - -

BP

_US

ER

- - - - - - - - - 11 - - -

PA1 11 - - - - - - - -

MF

X_W

AK

EU

P

- - - 12 - - -PA2 12 - - - - - -

TS

_G

1_I

O3

- - - - - 13 - -

SB

28

PA3 13 - - - - - -

TS

_G

1_I

O4

- - - - - 14 - -

SB

27

PA4 14 - - - - - - - - -

PA

4 - - 15 - - -

PA5 15 - - - -

RE

D - - - - - - - 16 - - -

PA6 16 - - - - - -

TS

_G

2_IO

3

- - - - - 17 - -

SB

26


26/39 DocID026429 Rev 2

PA7 17 - - - - - -

TS

_G

2_IO

4

- - - - - 18 - -

SB

25

PA8 29 - - - - - - -

eP

D1_

BU

SY

- - - 19 - - - -

PA9 30 -

US

AR

T_

TX

- - - - - - - - - 18 - - - -

PA10 31 -

US

AR

T_R

X

- - - - - - - - - 17 - - - -

PA11 32 - - - - -

US

B_D

M

- - - - - 16 - - 2(2)

SB

17

PA12 33 - - - - -

US

B_

DP

- - - - - 15 - - 3(2)

SB

16

PA13 34

SW

DIO

- - - - - - - - - - 14 - - - -

PA14 37

SW

CLK

- - - - - - - - - - 13 - - - -

PA15 38 - - - - - - -

ePD

1_C

S

- - - 12 - - - -

PB0 18 - - - - - -

TS

_G3_

IO2

- - - - - 19 - -

SB

24

Table 6. Extension connectors (continued)


Ma

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un

ctio

n

LQ

FP

48 p

in n

um

.

SY

ST

EM

VC

P

Pu

shB

utt

on

s

LE

D

NF

C C

R9

5HF

-B

US

B U

SE

R

Lin

ear

to

uch

se

ns

or

E-p

aper

Dis

pla

y

Idd

Mea

su

re

Fre

e I/O

Po

wer

Su

pp

ly

P2

P3

CN

1

CN

3

SB

x(1)

DocID026429 Rev 2 27/39


38

PB1 19 - - - - - -

TS

_G

3_IO

3

- - - - - 20 - -

SB

23

PB2 20 - - - - - - -

eP

D1_

RE

SE

T

- - - - 21 - - -

PB3 39 - - - - - - -

ePD

1_S

CK

- - - 11 - - - -

PB4 40 - - -

GR

EE

N

- - - - - - - 10 - - - -

PB5 41 - - - - - - -

eP

D1_

MO

SI

- - - 9 - - - -PB6 42 - - - -

NF

C_

IRQ

INN

- - - - - - 8 - 2 - -

PB7 43 - - - -

NF

C_

IRQ

OU

TN

- - - - - - 7 - 1 - -

PB8 45 - - - - - - - -

MF

X_I

2C_

SC

L

- - 4 - - - -



Ma

in f

un

ctio

n

LQ

FP

48 p

in n

um

.

SY

ST

EM

VC

P

Pu

shB

utt

on

s

LE

D

NF

C C

R9

5HF

-B

US

B U

SE

R

Lin

ear

to

uch

se

ns

or

E-p

aper

Dis

pla

y

Idd

Mea

su

re

Fre

e I/O

Po

wer

Su

pp

ly

P2

P3

CN

1

CN

3

SB

x(1)


28/39 DocID026429 Rev 2

PB9 46 - - - - - - - -

MF

X_I

2C_S

DA

- - 3 - - - -

PB10 21 - - - - - - -

eP

D1_

PW

R8E

Nn

- - - - 22 - - -

PB11 22 - - - - - - -

ePD

1_D

/C

- - - - 23 - - -

PB12 25 - - - -

NF

C_

NS

S

- - - - - - 23 - 3 - -

PB13 26 - - - -

NF

C_

SC

K

- - - - - - 22 - 6 - -

PB14 27 - - - -

NF

C_M

ISO

- - - - - - 21 - 4 - -

PB15 28 - - - -

NF

C_M

OS

I

- - - - - - 20 - 5 - -

PC13 2 - - - - - - - -

MF

X_

IRQ

_OU

T

- - - 4 - - -



Ma

in f

un

ctio

n

LQ

FP

48 p

in n

um

.

SY

ST

EM

VC

P

Pu

shB

utt

on

s

LE

D

NF

C C

R9

5HF

-B

US

B U

SE

R

Lin

ear

to

uch

se

ns

or

E-p

aper

Dis

pla

y

Idd

Mea

su

re

Fre

e I/O

Po

wer

Su

pp

ly

P2

P3

CN

1

CN

3

SB

x(1)

DocID026429 Rev 2 29/39


38

PC14 3

OS

C3

2_IN

- - - - - - - -

PC

14 - - 5 - - -

PC15 4

OS

C3

2_O

UT

- - - - - - - -

PC

15 - - 6 - - -

PH0 5

OS

C_I

N

- - - - - - - - - - - 7 - - -

PH1 6 - - - - - - - - -

PH

1

- - 8 - - -

- - - - - - - - - - - -

5V_U

SB

_US

ER

- - - 1 -

- - - - - - - - - - - -

3V3

1 - 7 - -

- - - - - - - - - - - -

5V_I

N

- 1 - - -

- - - - - - - - - - - -

5V_O

UT

- 3 - - -

VDD 24 - - - - - - - - - -

VD

D

5 - - - -

VDD 48 - - - - - - - - - -

VD

D - - - - -

VDD_USB 36 - - - - - - - - - -

VD

D - - - - -

VDDA 9 - - - - - - - - - - - - - - - -

VLCD 1 - - - - - - - - - -

VD

D - - - - -

VSS 23 - - - - - - - - - -

GN

D

2 2 8 4(2) -



Ma

in f

un

ctio

n

LQ

FP

48 p

in n

um

.

SY

ST

EM

VC

P

Pu

shB

utt

on

s

LE

D

NF

C C

R9

5HF

-B

US

B U

SE

R

Lin

ear

to

uch

se

ns

or

E-p

aper

Dis

pla

y

Idd

Mea

su

re

Fre

e I/O

Po

wer

Su

pp

ly

P2

P3

CN

1

CN

3

SB

x(1)


30/39 DocID026429 Rev 2

VSS 35 - - - - - - - - - -

GN

D

25 10 - 5 -

VSS 47 - - - - - - - - - -

GN

D - 25 - 6 -

VSSA 8 - - - - - - - - - -

GN

D - - - - -

- - - - - - - - - - - - NC 24 24 - - -

1. Signals available depending on SBx value. Refer to Table 5: Solder bridges or schematics in Section 6.

2. Connected through a resistor



Ma

in f

un

ctio

n

LQ

FP

48 p

in n

um

.

SY

ST

EM

VC

P

Pu

shB

utt

on

s

LE

D

NF

C C

R9

5HF

-B

US

B U

SE

R

Lin

ear

to

uch

se

ns

or

E-p

aper

Dis

pla

y

Idd

Mea

su

re

Fre

e I/O

Po

wer

Su

pp

ly

P2

P3

CN

1

CN

3

SB

x(1)

DocID026429 Rev 2 31/39

UM1775 Mechanical drawing

38

5 Mechanical drawing

Figure 12. STM32L053 discovery board mechanical drawing

Electrical schematics UM1775

32/39 DocID026429 Rev 2

6 Electrical schematics

Figure 13. STM32L053 discovery

16

STM32L053 Disc

overy

MB11

43B-01

22-M

ay-14

Title

:

Size:

Reference:

Date:

Sheet:

of

A4

Revision:

STM32L0

538-DISCO

Project:

SWDIO

SWCL

KPA

14PA

13

MCO

NRST

T_NRST

PB8

BOOT0

NRST

PC15

PC14

PH1

PH0

MCO

PC13

PA0

PA1

PA2

PA3

PA4

PA5

PA6

PA7

PA8

PA9

PA10

PA11

PA12

PA13

PA14

PA15

PB0

PB1

PB2

PB3

PB4

PB5

PB6

PB7

PB9

PB10

PB11

PB12

PB13

PB14

PB15

B_U

SER

LD_R

SWCL

KSW

DIO

USA

RT_

TXUSA

RT_

RX

LD_G

ePD1_

BUSY

ePD1_

RES

ETePD1_

D/C

ePD1_

CS

ePD1_

SCK

ePD1_

MOSI

ePD1_

PWR_E

Nn

USB

1_DP

USB

1_DM

TS_G

3_IO

2

TS_G

1_IO

3

TS_G

2_IO

3

TS_G

1_IO

4

TS_G

2_IO

4

TS_G

3_IO

3

NFC

_IRQIN

n

NFC

_MISO

NFC

_SCK

NFC

_IRQOUTn

NFC

_NSS

NFC

_MOSI

MFX

_I2C

_SCL

MFX

_I2C

_SDA MFX

_IRQ_O

UT

MFX

_WAKEU

P

U_S

TM32Lx

STM32Lx

.SchDoc

MCO

PA0

PA1

PA2

PA3

PA4

PA5

PA6

PA7

PA8

PA9

PA10

PA11

PA12

PA13

PA14

PA15

PB0

PB1

PB2

PB3

PB4

PB5

PB6

PB7

PB8

PB9

PB10

PB11

PB12

PB13

PB14

PB15

PC13

PC14

PC15

PH0

PH1

BOOT0

NRST

Rev A-01 --> PC

B label M

B11

43 A-01

Rev B-01 --> PC

B label M

B1143 B-01, Layou

t of M

OSF

ET m

odified

Idd Sh

unt resistors adjusted, Correction on CN1 and CN3

USA

RT_

TXUSA

RT_

RX

B_U

SER

LD_G

LD_R

VDD

GND

GND

GND

PA0

PA1

PA2

NRST

PC13

PC14

PC15

PH1

PH0

PA4

PA5

PA6

PA7

PB10

PB11

PB1

PB2

PB0

PA3

PB5

PB6

PB7

PB8

PB9

PA15

PB3

PA14

PB4

BOOT0

PA11

PA12

PA9

PA10

PB12

PB13

PB14

PB15

PA13

PA8

SWDIO

SWCL

K

PB4

PB3

USA

RT_

TXUSA

RT_

RX

5V_IN

5V_O

UT

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

P2 Header 2

5

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

P3 Header 2

5

NC

NC

NRST

NRST

TS_G

1_IO

3TS

_G1_IO

4

TS_G

2_IO

3TS

_G2_IO

4

TS_G

3_IO

2TS

_G3_IO

3

B_U

SER

LD_R

LD_G

USB

1_DM

USB

1_DPNFC

_IRQIN

nNFC

_IRQOUTn

NFC

_NSS

NFC

_MOSI

NFC

_MISO

NFC

_SCK

U_S

ENSO

R_P

BSE

NSO

R_P

B.SchDoc

B_U

SER

TS_G

3_IO

2TS

_G3_IO

3

TS_G

1_IO

3TS

_G1_IO

4

TS_G

2_IO

3TS

_G2_IO

4

ePD1_

BUSY

ePD1_

RES

ETePD1_

D/C

ePD1_

CS

ePD1_

SCK

ePD1_

MOSI

ePD1_

PWR_E

Nn

U_E

-Paper_D

isplay

E-Paper_Display.SchDoc

SWDIO

SWCL

KMCO

NRST

USA

RT_

RX

USA

RT_

TXMFX

_USA

RT3

_RX

MFX

_USA

RT3

_TX

U_S

T_LINK_V

2-1

ST_L

INK_V

2-1.SC

HDOC

MFX

_WAKEU

PMFX

_IRQ_O

UT

MFX

_I2C

_SDA

MFX

_I2C

_SCL

MFX

_USA

RT3

_RX

MFX

_USA

RT3

_TX

U_IDD_m

easurement

IDD_m

easurement.S

chDoc

NFC

_IRQIN

nNFC

_IRQOUTn

NFC

_NSS

NFC

_MOSI

NFC

_MISO

NFC

_SCK

NFC

_IRQIN

nNFC

_IRQOUTn

NFC

_NSS

NFC

_MOSI

NFC

_MISO

NFC

_SCK

TS_G

3_IO

2TS

_G3_IO

3

TS_G

1_IO

3TS

_G1_IO

4

TS_G

2_IO

3TS

_G2_IO

4

USB

1_DM

USB1_

DP

LD_G

LD_R

USB

1_DM

USB1_

DP

ePD1_

BUSY

ePD1_

D/C

ePD1_

RES

ET

ePD1_

SCK

ePD1_

CS

ePD1_

MOSI

ePD1_

PWR_E

Nn

ePD1_

BUSY

ePD1_

D/C

ePD1_

RES

ET

ePD1_

SCK

ePD1_

CS

ePD1_

MOSI

ePD1_

PWR_E

Nn

MFX

_I2C

_SCL

MFX

_I2C

_SDA

MFX

_IRQ_O

UT

MFX

_WAKEU

P

MFX

_I2C

_SCL

MFX

_I2C

_SDA

MFX

_IRQ_O

UT

MFX

_WAKEU

P

MFX

_USA

RT3

_RX

MFX

_USA

RT3

_TX

MFX

_USA

RT3

_RX

MFX

_USA

RT3

_TX

3V_O

UT

DocID026429 Rev 2 33/39

UM1775 Electrical schematics

38

Figure 14. ST-LINK/V2-1 (SWD only)

26

ST-LIN

K/V2-1 with

supp

ort o

f SWD only

MB11

43B-01

26-M

ay-14

Title

:

Size:

Reference:

Date:

Sheet:

of

A4

Revision:

STM32L0

538-DISCO

Project:

26

ST-LIN

K/V2-1 with

supp

ort o

f SWD only

MB11

43B-01

Title

:

Size:

Reference:

Date:

Sheet:

of

A4

Revision:

STM32L0

538-DISCO

Project:

USB

_DM

USB_D

P

STM

_RST

T_JTCKT_

JTCK

T_JTDOT_JTDI

T_JT

MS

STM

_JTM

S

STM

_JTC

K

OSC_IN

OSC_O

UT

T_NRST

AIN_1

3V3_ST

_LIN

K

3V3_ST

_LIN

K

SWIM_IN

SWIM_INSWIM

SWIM_RST_INSWIM_RST

USB

_DM

USB_D

P

USB VCC

1

D-

2

D+

3

ID4

GND

5

SHEL

L6

CN2

USB

-MIN

I-typeB

COM

ST-LIN

K Po

wer

3V3_ST

_LIN

K

Jumper

s ON --> D

ISCOVERY S

elec

ted

Jumper

s OFF

-->

ST-L

INK S

elec

ted

Boa

rd Id

ent: PC13

=0

T_JT

CK

T_JT

MS

SWD

3V3_ST

_LIN

K

1234

CN4

SB7

SB4

SB8

SB5

SB9

SB6

SB12

SB11

STM

_JTM

S

STM

_JTC

KSW

CLK

SWDIO

SWD

RESERVED

DEFAULT

3V3_ST

_LIN

K

T_SW

DIO

_IN

T_SW

OLE

D_S

TLINK

LED_S

TLINK

3V3_ST

_LIN

K

Red

_Green

21

34

LD1

LD_B

ICOLO

R_C

MS

SWDIO

SWCL

KTC

K/SWCL

KTM

S/SW

DIO

3V3

Not Fitted

MCO

MCO

T_JRST

1 2 3 4 5 6

CN5

Header 6

AIN_1

T_NRST

T_SW

O

NRST

SB13

T_NRST

SB10

RC M

ust b

e very close to

STM

32F103 pin 29

51

2

GND

3

4

BYPA

SSIN

H

Vin

Vou

t

U2

LD3985M33R

D5

BAT6

0JFILM

TX RX

SB3

SB2

USA

RT_

RX

USA

RT_

TX

Close to

JP

Not Fitted

STLINK_TX

STLINK_R

X

Not Fitted

LD2

LED, red

C15

100n

F

C17

100n

F

C8

100n

F

C5

100n

F

C10

1uF

C3

1uF

C2

100n

FC9

100n

FC4

10nF

C6

20pF

C7

20pF

C18

100n

FC16

20pF

12

X1

8MHz

3V3_ST

_LIN

K

R15

4K7

R16

2K7

USB

_REN

UMn

PWR_EXT

PWR_E

Nn

3V3_ST

_LIN

K

JP2

3

1

2

T1 9013

-SOT2

3

R9

10K

R23

36K

3V3_ST

_LIN

K

R10

100

USB

_REN

UMn

PA14

PA13

R22

100

R11

100

R4

1K

R12

10K

R6

1K5

R7

0R5

100K

R8

0

R30

4K7

R29

4K7

R31

100K

R26

10K

R14

100K

R27

[NA]

R24

10K

R25

22R28

[NA]

R33

22R34

22R35

22

R1

0

R3

100

R2

100

PWR_E

Nn

TP2

TP1

3V3

EN1

GND 2

VO

4

NC

5

GND 7

VI

6PG

3U3

LD39050P

U33R

R32

10K

C20

1uF

C21

100n

FC11

1uF

C19

100n

F

3V3_ST

_LIN

K

5 Vo

lts Outpu

t3 Vo

lts Outpu

t5 Vo

lts From Externa

l

SB1

5V_IN

5V_IN

5 Vo

lts From USB

ST-LINK

JP3

3V3_ST

_LIN

K

3V3_ST

_LIN

K

VBAT

1

PA7 17

PC13

2

PA12

33PC

143

PB0 18

PC15

4JTMS/SW

DIO

34

OSC

IN5

PB1 19

OSC

OUT

6

VSS

_235

NRST

7

PB2/BOOT1 20

VSS

A8

VDD_2

36

VDDA

9

PB10 21

PA0

10

JTCK/SWCLK37

PA1

11

PB11 22

PA2

12

PA15/JTDI38

PA3 13

VSS_1 23

PA4 14

PB3/JTDO39

PA5 15

VDD_1 24

PA6 16

PB4/JNTRST40

PB12

25

PB541

PB13

26

PB642

PB14

27

PB743

PB15

28

BOOT044

PA8

29

PB845

PA9

30

PB946

PA10

31

VSS_347

PA11

32

VDD_348

U1

STM32F1

03CBT6

5V

D6

STPS

1L30A

D3

STPS

1L30A

JP1

D4

STPS

1L30A

5V_U

SB_U

SER

5V_U

SB_S

T_LINK

5V_U

SB_S

T_LINK

4

3

5

G

SD 6

78

21

T3 STS7

PF30L

PWR_E

Nn

MFX

_USA

RT3

_RX

MFX

_USA

RT3

_TX

SB15

SB14

D2 BAT6

0JFILM

D1 BAT6

0JFILM

5V_U

SB_U

SER

5V_O

UT

3V_O

UT

3

4

5

G

SD

6

21

T2FD

C60

6P

T3 Not Fitted


34/39 DocID026429 Rev 2

Figure 15. STM32L053C8T6 MCU

36

STM32L053C

8T6 MCU

MB11

43B-01

22-M

ay-14

Title

:

Size:

Reference:

Date:

Sheet:

of

A4

Revision:

STM32L0

538-DISCO

Project:PB5

PB6

PB7

PA4 PA

5

PA9

PA10

PB12

PB13

PB14

PB15

PB10PB

11

PB8

PA0

PB9

PA1

PB1

PB2

PA15

PB3

PA13

PA14

PB4

PA8

MCO

PA0

NRST

PB0

BOOT0

PH1

PH0

Must b

e close to th

e MCU

NRST

MCO

PC13

PH0-OSC

_IN

PA1

PA2

PA3

PA4 PA

5PA

6 PA7

PA8

PA9

PA10

PA11

PA12

PA13

PA14

PA15

PB1

PB2

PB3

PB4

PB5

PB6

PB7

PB8

PB9

PB10PB

11

PB12

PB13

PB14

PB15

PC13

R65

510

PA0

B_U

SER

B_U

SER

LD_R

LD_R

VDD

All this block m

ust b

e very close to

the ST

M32L0

53

VDDA

PH1

PH0-OSC

_IN

VDD

VDD

VDD

BOOT0

ePD1_

BUSY

PA8

ePD1_

D/C

ePD1_

RES

ETPB

2PB

11

ePD1_

SCK

ePD1_

CS

PA15

PB3

ePD1_

MOSI

PB5

PB4

ePD1_

PWR_E

Nn

PB10

SWCL

KSW

DIO

SWDIO

SWCL

KPA

14PA

13C52

100n

FC48

100n

FC49

100n

F

L3 Ferrite

C44

100n

F

USA

RT_

TXUSA

RT_

RX

PA9

VDDA

VDD

USA

RT_

TXUSA

RT_

RX

SB20

SB21

C54

1uF

C53

100n

F

VLC

D1

PA7 17

PC13

2

PA12

33PC

14/OSC

32_IN

3

PB0 18

PC15/OSC

32_O

UT

4PA

1334

PH0/OSC

_IN

5

PB1 19

PH1/OSC

_OUT

6

VSS

_235

NRST

7

PB2 20

VSS

A8

VDD_U

SB36

VDDA

9

PB10 21

PA0

10

PA1437

PA1

11

PB11 22

PA2

12

PA1538

PA3 13

VSS_1 23

PA4 14

PB339

PA5 15

VDD_1 24

PA6 16

PB440

PB12

25

PB541

PB13

26

PB642

PB14

27

PB743

PB15

28

BOOT044

PA8

29

PB845

PA9

30

PB946

PA10

31

VSS_347

PA11

32

VDD_348

U8

STM32L0

53C8T

6

PA10

LD_G

LD_G

ePD1_

BUSY

ePD1_

RES

ETePD1_

D/C

ePD1_

CS

ePD1_

SCK

ePD1_

MOSI

ePD1_

PWR_E

Nn

C47

6.8pF

C50

6.8pF

PC15

PC14

Not Fitted

PC14-O

SC32_IN

PC15-O

SC32_O

UT

SB19

SB18

R70

0

R71

0

Must b

e close to th

e Crystal

41

32

X2

XTA

L_32

K_2

0PPM

PC14-O

SC32_IN

PC15-O

SC32_O

UT

USB

1_DP

USB

1_DM

USB

1_DM

USB

1_DP

TS_G

3_IO

2TS

_G3_IO

3

TS_G

1_IO

3TS

_G1_IO

4

TS_G

2_IO

3TS

_G2_IO

4

TS_G

3_IO

2

TS_G

1_IO

3

TS_G

2_IO

3

TS_G

1_IO

4

TS_G

2_IO

4

TS_G

3_IO

3

NFC

_IRQIN

nNFC

_MISO

NFC

_SCK

NFC

_IRQOUTn

NFC

_NSS

NFC

_MOSI

NFC

_IRQIN

n

NFC

_IRQOUTn

NFC

_NSS

NFC

_MOSI

NFC

_MISO

NFC

_SCK

PB6

PB7

PB12

PB13

PB14

PB15

USB

1_DM

USB

1_DP

TS_G

3_IO

2TS

_G3_IO

3

TS_G

1_IO

3

TS_G

1_IO

4

TS_G

2_IO

3TS

_G2_IO

4PA

6 PA7

PA11

PA12

PB0

PA3

PA2

SB28

SB27

SB26

SB25

SB24

SB23

SB17

SB16

PB0

PA2

PA3

PA6

PA7

PB1

PA11

PA12

MFX

_I2C

_SCL

MFX

_I2C

_SDA

MFX

_I2C

_SDA

MFX

_I2C

_SCL

PB8

PB9

MFX

_IRQ_O

UT

MFX

_WAKEU

PMFX

_WAKEU

PMFX

_IRQ_O

UT

PA1

PC13

PA5

DocID026429 Rev 2 35/39


38

Figure 16. Electronic paper display

46

Electron

ic Pap

er Display

MB11

43B-01

26-M

ay-14

Title

:

Size:

Reference:

Date:

Sheet:

of

A4

Revision:

STM32L0

538-DISCO

Project:

1

23

T4 SI13

04BD

L

C25

1μF_X5R_0603

C26

1μF_X5R_0603

C28

1μF_X5R_0603

C23

1μF_X5R_0603

C30

1μF_X5R_0603

C31

1μF_X5R_0603

C29

1μF_X5R_0603

C24

2.2μF_X5R_0603

VDD_ePD

1

C37

100nF_X7R_0603

VDD_ePD

1

VDD_ePD

1

C35

1μF_X5R_0603

C33

1μF_X5R_0603

VDD_ePD

1

13

2

D7

BAT5

4SFILM

L1 22μH

0,5A 20%

NC

1

GDR

2

RES

E3

VGL

4

VGH

5

TSCL

6

TSDA

7

BS1

8

BUSY

9

RES

#10

D/C#

11

CS#

12

D0

13

D1

14

VDDIO

15

VCI

16

VSS

17

VDD

18

VPP

19

VSH

20

PREV

GH

21

VSL

22

PREV

GL

23

VCOM

24

P1 CON_G

DE0

21A1_

EPD

Electro

nic Paper D

isplay

GDE0

21A1, 2.04", 1

72×7

2 do

tsMust b

e used with

CON_G

DE021A

1_EPD

U4

EPD_G

DE0

21A1

3V3

VDD_ePD

1

SCL

2

OS/IN

T3

VDD

8

A1

6

VSS

4

SDA

1

A2

5

A0

7

U5

STLM

75DS2

F

D8

MBR0530

ePD1_

BUSY

ePD1_

RES

ETePD1_

D/C

ePD1_

CS

ePD1_

SCK

ePD1_

MOSI

ePD1_

PWR_E

Nn

C22

1μF_

X5R

_0603

C27

10μF

_X5R

_060

3

VDD_ePD

1

R41

2.2K_1%_0603

R42

2.2K_1%_0603

ePD1_

BUSY

ePD1_

RES

ETePD1_

D/C

ePD1_

CS

ePD1_

SCK

ePD1_

MOSI

PA15

PB2

PB11

PA8

PB3

PB5

ePD1_

PWR_E

Nn

PB10

R36

10K_1

%_0

402

R38

6R8_

1%_0

805

R37

10K_1

%_0

402

R44

10K_1

%_0

402

3

4

5

G

SD

6

21

T6 FDC60

6P

4

3

5

G

SD 6

78

21

T5 STS7

P2UH7

R43

10_1%_0

805

T5 Not Fitted


36/39 DocID026429 Rev 2

Figure 17. Linear touch sensor, NFC, USB and pushbutton

56

Linear Tou

ch Sensor, NFC

, USB

and

Push Button

MB11

43B-01

22-M

ay-14

Title

:

Size:

Reference:

Date:

Sheet:

of

A4

Revision:

STM32L0

538-DISCO

Project:

LS_P1

Line

ar Tou

ch Sen

sor m

ade of 3 electrode

s

TS_G

3_IO

2

TS_G

1_IO

3

TS_G

2_IO

3

R17

10K

R18

10K

R19

10K

TS_G

1_IO

4

TS_G

2_IO

4

TS_G

3_IO

3

PB0

PA2

PA3

PA6

PA7

PB1

1 1

2 2

3 3

LS1Linear Sensor

LS_P2

LS_P3

C14

47nF

C13

47nF

C12

47nF

NFC

_IRQIN

nNFC

_IRQOUTn

NFC

_NSS

NFC

_MOSI

PB15

PB12

PB14

NFC

_MISO

NFC

_SCK

PB13

C1

100n

F

NFC

PB7

PB6 NFC

kit referenc

e: CR95

HF-B

78

56

34

12

CN1

female conn

4X2

Ope

ratin

g Vo

ltage

: +3.3V

VDD

B_U

SERU

SER &

WAKE-

UP Button

PA0

1 234

B1SW-PUSH-CMS_BLUE

SB22

B_U

SER

C51

100n

F

NRST

NRST R

ESET

Button

VDD R74

[NA]

1 234

B2SW-PUSH-CMS_BLACK

SB29 C55

100n

F

3V3

LD_R

LD_G

LD_R

LD_G

R60

330

R69

1K

LD4

LED, red

LD3

LED, green

USB

1_DM

USB

1_DP

USB

Use

r5V

_USB

_USE

R

USB

1_DM

USB1_

DP

R21

0R20

0R13

100K

VCC

1

D-

2

D+

3

ID4

GND

5

SHEL

L6

CN3

USB

-MIN

I-typeB

R73

10K

R72

10K

PA5

PA11

PA12

PB4

12

34

56

78

DocID026429 Rev 2 37/39


38

Figure 18. IDD measurement / MFX (Multi Function eXpander)

66

IDD m

easurement / M

FX (M

ulti Fu

nctio

n eX

pand

er)

MB11

43B-01

26-M

ay-14

Title

:

Size:

Reference:

Date:

Sheet:

of

A4

Revision:

STM32L0

538-DISCO

Project:

MFX

_WAKEU

P

MFX

_IRQ_O

UT

R62 10

0

VDD

differen

tial a

mplifier

1

4

3 2

11V+

V-

U7A

TSZ1

24IPT

75 6

U7B

TSZ1

24IPT

810 9

U7C

TSZ1

24IPT

1412 13

U7D

TSZ1

24IPT

All this block m

ust b

e very close to

the ST

M32L1

52

C38

100n

FC41

100n

FC42

100n

F

L2 Ferrite

C34

100n

FC36

1uF

C40

100n

F

R45

510

3V3

R68

4K7_

1%_0

402

R67

100K

_1%_0

402

MFX

_IDD_S

H0

R56

10K_1

%_0

402

R54

10K_1

%_0

402

R53

10K_1

%_0

402

R58

10K_1

%_0

402

VDDA_L

1

C45

100n

F

C43

100n

F

R47

10K

R40

10K

3V3

3V3

3V3

3V3

3V3

3V3

VDDA_L

1

3V3

MFX

_IDD_M

EAS

MFX

_IDD_M

EAS

1 2 3 4

CN6

MFX

_SWCLK

MFX

_SWCLK

MFX

_I2C

_SCL

MFX

_I2C

_SDA

MFX

_I2C

_SDA

MFX

_I2C

_SCL

R46

2K2

R48

2K2

3V3

12

3

JP4

C46

100n

F

C32

100n

F

R63

1K_0

.1%_0

402

R64

49K9_

0.1%

_040

2

R66

1K_0

.1%_0

402

R61

49K9_

0.1%

_040

2

VLC

D1

PA7 17

PC13

2

PA12

33PC

14/OSC

32_IN

3

PB0 18

PC15/OSC

32_O

UT

4PA

1334

PH0/OSC

_IN

5

PB1 19

PH1/OSC

_OUT

6

VSS

_235

NRST

7

PB2 20

VSS

A8

VDD_2

36

VDDA

9

PB10 21

PA0

10

PA1437

PA1

11

PB11 22

PA2

12

PA1538

PA3 13

VSS_1 23

PA4 14

PB339

PA5 15

VDD_1 24

PA6 16

PB440

PB12

25

PB541

PB13

26

PB642

PB14

27

PB743

PB15

28

BOOT044

PA8

29

PB845

PA9

30

PB946

PA10

31

VSS_347

PA11

32

VDD_348

U6

STM32L1

52CCT6

R59

1_1%

_080

5

C39

1uF

R39

0

MFX

_USART3

_RX

MFX

_USART3

_TX

MFX

_IRQ_O

UT

MFX

_SWDIO

MFX

_IDD_S

H1

MFX

_IDD_S

H2

MFX

_IDD_C

AL

MFX

_IDD_C

AL

MFX

_IDD_S

H2

MFX

_IDD_S

H1

MFX

_IDD_S

H0

MFX

Multi Fu

nctio

n eX

pand

er

MFX

_I2C

_SCL

MFX

_I2C

_SDA

MFX

_SWDIO

3

4 5

G

S D

621

T13

FDC60

6P

MFX

_USA

RT3

_RX

MFX

_USA

RT3

_TX

MFX

_USART3

_RX

MFX

_USART3

_TX

4

3 5

G

S D

6 7 821

T14

STS7

P2UH7

3

4

5

G

SD

6

21

T11

FDC60

6P

4

3

5

G

SD 6

78

21

T12

STS7

P2UH7

3

4 5

G

S D

621

T9 FDC60

6P

4

3 5

G

S D

6 7 821

T10

STS7

P2UH7

3

4 5

G

S D

621

T7 FDC60

6P

4

3 5G

S D

6 7 821

T8ST

S7P2

UH7

R49

10K

R51

100K

VDD

5V

3V3

5V

R50

1K_1

%_0

402

3V3

MFX

_VDD_M

CU

MFX

_I2C

_ADDR

R57

10K_1

%_0

805

R52

24_1%_0

805

R55

620_

1%_0

805

T12, T14 Not Fitted

T8, T

10 Not Fitted

Not Fitted

Revision history UM1775

38/39 DocID026429 Rev 2

7 Revision history

Table 7. Document revision history

Date Revision Changes

20-June-2014 1 initial release

24-June-2014 2 Removed embedded USB bootloader paragraph.

DocID026429 Rev 2 39/39

UM1775

39

Please Read Carefully:

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figure 1. stm32l053 discovery board › content › keil.stm32l... · june 2014 docid026429 rev 2...

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