UM1775
User manual
Discovery kit for STM32L0 series with STM32L053C8 MCU
Introduction
The STM32L053 discovery kit (32L0358DISCOVERY) helps the user discover the full range
of features of the STM32L0 series and develop applications. It is based on
STM32L053C8T6 and includes ST-LINK/V2-1 embedded debug tool interface, linear touch
sensor, touch keysRev 3, IDD current measurement, 2.04” E-paper display, NFC connector
for PLUG-CR95HF-B board, LEDs, pushbuttons and USB Mini-B connector.
The board comes with a comprehensive STM32 software HAL library with various packaged
software examples, as well as direct access to mbed™ online resources at http://mbed.org.
Figure 1. STM32L053 discovery board
Picture not contractual
January 2016
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www.st.com
Contents
UM1775
Contents
1
Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2
Ordering and product information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1
Product marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2
Order code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4
Hardware layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1
4.2
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Embedded ST-LINK/V2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.1.1
Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.1.2
ST-LINK/V2-1 firmware upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1.3
VCP configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1.4
Using ST-LINK/V2-1 to program/debug the STM32L053 on board
4.1.5
Using ST-LINK/V2-1 to program/debug an external
STM32 application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
. . . 14
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
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Contents
5
Mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6
Electrical schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
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List of tables
UM1775
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
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ON/OFF conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Jumper states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Debug connector CN5 (SWD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
NFC connector pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Solder bridges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Extension connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
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List of figures
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Figure 17.
Figure 18.
STM32L053 discovery board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
STM32L053 discovery hardware block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Top layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Bottom layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Updating the list of drivers in device manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
STM32L053 discovery board connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
ST-LINK/V2-1 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
NFC board plugged on STM32L053 discovery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Jumper in position OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Jumper in position ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
No Jumper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
STM32L053 discovery board mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
STM32L053 discovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
ST-LINK/V2-1 (SWD only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
STM32L053C8T6 MCU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Electronic paper display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Linear touch sensor, NFC, USB and pushbutton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
IDD measurement / MFX (multi-function expander) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
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Conventions
1
UM1775
Conventions
Table 1 provides the definition of some conventions used in the present document.
Table 1. ON/OFF conventions
Convention
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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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2
Ordering and product information
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
Product marking
Tools marked as "ES" or "E" are not yet qualified and as such, they may be used only for
evaluation purposes. ST shall not be liable for any consequences related with other ways of
use of such non-qualified tools, for example, as reference design or for production.
Examples of location of "E" or "ES" marking:
2.2
•
on target STM32 microcontroller part mounted on the board (for illustration, refer to
section "Package information" in its datasheet at www.st.com)
•
next to the evaluation tool ordering part number, as a label stuck or a silk-screen
printed on the board
Order code
To order the STM32L053 discovery kit, use the order code: STM32L0538-DISCO.
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Features
3
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Features
The STM32L053 discovery board offers the following features:
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•
STM32L053C8T6 microcontroller featuring 64 Kbytes of Flash memory and 8 Kbytes
of RAM, in an LQFP48 package
•
On-board ST-LINK/V2-1 with selection mode switch to use the kit as a standalone
programming and debugging tool (with SWD connector for programming and
debugging)
•
mbed™-enabled (mbed.org)
•
USB ST-LINK with re-enumeration capability and three different interfaces:
–
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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4
Hardware layout
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 (STLINK/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
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Hardware layout
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Figure 3. Top layout
67/,1.9
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/'&20
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-35;7;
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-3
,''PHDVXUHPHQW
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/'2UDQJH/('
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/LQHDUWRXFKVHQVRUWRXFK.H\V
069
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Hardware layout
Figure 4. Bottom layout
6%
UHVHUYHG
6%
GHIDXOW
6%
1567
6%
670B567
6%
5;7;
6%
;FU\VWDO
;FU\VWDO
6%
86%B86(5
670/&7
6%
0&2
6%
%86(5
6%
26&B,1
6%
%5(6(7
6%
WRXFKVHQVRU
069
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Hardware layout
4.1
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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 are listed below.
•
•
New features supported on ST-LINK/V2-1:
–
USB software re-enumeration
–
Virtual COM port interface on USB (Section 4.1.3)
–
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 4.1.4).
•
program/debug an MCU in an external application board using a cable connected to
SWD connector CN5 (Section 4.1.5).
Table 2. Jumper states
Jumper state
4.1.1
Description
Both CN4 jumpers ON
ST-LINK/V2-1 functions enabled for on board programming (default)
Both CN4 jumpers OFF
ST-LINK/V2-1 functions enabled for application through external CN5
connector (SWD supported)
Drivers
ST-LINK/V2-1 requires a dedicated USB driver that, for Windows XP, 7 and 8, can be found
at www.st.com.
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:
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Prefer using the “USB Composite Device” handle for a full recovery.
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Hardware layout
Figure 5. Updating the list of drivers in device manager
4.1.2
ST-LINK/V2-1 firmware upgrade
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 upto-date with the latest firmware version.
4.1.3
VCP configuration
ST-LINK/V2-1 supports virtual COM port (VCP). To enable this function, the solder bridges
SB2 and SB3 (See Figure 3: Top layout) for mbed support are closed. Table 5: Solder
bridges indicates this with ON state.
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Hardware layout
4.1.4
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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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4.1.5
Hardware layout
Using ST-LINK/V2-1 to program/debug an external
STM32 application
It is very easy to use ST-LINK/V2-1 to program an STM32 microcontroller 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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Hardware layout
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Figure 7. ST-LINK/V2-1 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:
•
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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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Hardware layout
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.
•
4.2.1
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.
Power supply input from the USB connector
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/V2-1 USB connector CN2 (U5V or VBUS). Note that only the ST-LINK/V2-1 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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Hardware layout
4.3
4.4
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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).
LEDs
•
LD1 COM:
LD1 default status is red. LD1 turns to green to indicate that communications are in
progress between the PC and 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.
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
Hardware layout
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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Hardware layout
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The NFC board can be accessed in SPI or UART mode.
Table 4. NFC connector pinout
CN1 pin
4.6
NFC signals
STM32L053C8T6
Description
1
NFC_IRQOUTN
or UART1_TX
PB7
Interrupt output for NFC connected to
STM32L053C8T6 UART1 RX
2
NFC_IRQINN or
UART1_RX
PB6
Interrupt 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
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 in position OFF: STM32L053C8T6 is powered (default).
Figure 9. Jumper in position OFF
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Hardware layout
•
Jumper in 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 in 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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38
Hardware layout
UM1775
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 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 the ST-LINK/V2-1 MCU to use the virtual COM port function.
By default the USART1 communication between the target STM32L053C8T6 and
ST-LINK/V2-1 MCU is not enabled.
To use the virtual COM port function with:
4.12
•
The on-board 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)
OSC clock supply
If PH0 is only used as GPIOs instead of as a clock, then SB21 is closed. (SB20 must be
open)
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Hardware layout
MCO from ST-LINK/V2-1 (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:
Note:
–
SB18 closed
–
SB19 open
–
R70 removed
Please refer to the AN2867 for oscillator design guide for STM32 microcontrollers.
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Hardware layout
4.14
UM1775
Solder bridges
Table 5. Solder bridges
Bridge
State
(1)
Description
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
SB14,15 (reserved)
OFF
Reserved, do not modify
ON
B2 Push Button is connected to NRST of STM32L053C8T6
OFF
B2 Push Button is not connected to NRST of STM32L053C8T6
ON
B1 Push Button is connected to PA0
OFF
B1 Push Button is not connected to PA0
OFF
PA2, PA3 of STM32F103CBT6 are not connected to PA10, PA9 of
STM32L053C8T6
ON
PA2, PA3 of STM32F103CBT6 are connected to PA10, PA9 of
STM32L053C8T6
OFF
USB1_DP and USB1_DM are dedicated to the USB USER connector CN3
ON
USB1_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/V2-1
PWR)
ON
ST-LINK/V2-1 module is powered
OFF
ST-LINK/V2-1 module is not powered
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
ON
T_NRST signal from connector CN5 and STM32F103CBT6, is connected to
NRST of STM32L053C8T6
OFF
T_NRST signal is not connected
OFF
No incidence on NRST signal of STM32F103CBT6
ON
NRST signal of STM32F103CBT6 is connected to GND
ON
MCO clock signal from STM32F103CBT6 is connected to OSC_IN of
STM32L053C8T6. SB21 must be OFF
OFF
MCO signal of STM32F103CBT6 is not used.
SB18, 19 (X2 crystal)
SB29 (B2-RESET)
SB22 (B1-USER)
SB2,3 (VCP RX, TX)(2)
SB16,17 (USB_USER)
SB21 (OSC_IN)
SB13 (NRST)
SB10 (STM_RST)
SB20 (MCO)
1. Default value is in bold.
2. Default state is OFF for boards labeled MB1143 B-01 and older.
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UM1775
4.15
Hardware layout
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
SBx(1)
SB28
SB27
-
-
-
-
SB26
CN3
-
17
-
16
-
-
CN1
15
-
-
14
-
-
13
-
P3
-
12
-
-
-
11
-
P2
-
9
-
Power Supply
-
-
-
-
-
-
-
6
-
Free I/O
PA4
-
-
-
-
-
-
Idd Measure
-
DocID026429 Rev 3
-
MFX_WAKEUP
-
E-paper Display
-
Linear touch sensor
TS_G1_IO4 TS_G1_IO3
TS_G2_IO3
-
USB USER
-
NFC CR95HF-B
-
RED
-
LED
-
PushButtons
BP_USER
-
16
VCP
PA6
-
15
-
PA5
-
14
-
PA4
-
13
-
PA3
-
12
-
PA2
-
11
NRST BOOT0 SYSTEM
PA1
-
10
-
PA0
-
7
-
NRST
-
44
-
BOOT0
-
LQFP48 pin num.
Board function
Main function
MCU pin
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38
32
PA12
33
PA13
34
PA14
37
PA15
38
PB0
18
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-
SB24
-
-
-
SB17
3(2)
SB16
-
-
-
-
-
-
-
SB25
SBx(1)
CN3
-
-
-
2(2)
-
-
CN1
-
-
-
-
-
P3
-
-
19
-
-
12
-
13
-
14
-
15
-
P2
-
Power Supply
Free I/O
16
-
-
Idd Measure
-
-
-
E-paper Display
-
-
-
-
TS_G2_IO4 Linear touch sensor
-
-
-
ePD1_BUSY
-
USB USER
NFC CR95HF-B
LED
PushButtons
-
-
-
-
-
-
-
-
-
VCP
-
-
-
-
-
-
-
-
-
-
17
-
-
-
-
-
-
-
-
-
-
18
-
-
-
-
-
-
-
-
-
USART_RX USART_TX
19
-
-
-
-
-
-
-
-
USB_DP USB_DM
-
-
-
-
18
-
-
-
-
-
-
ePD1_CS
-
-
-
-
-
-
MCU pin
-
-
-
TS_G3_IO2
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
SYSTEM
PA11
-
31
-
PA10
-
30
-
PA9
-
29
-
PA8
SWCLK SWDIO
17
-
LQFP48 pin num.
PA7
-
Main function
Hardware layout
UM1775
Table 6. Extension connectors (continued)
Board function
PB5
41
PB6
42
PB7
43
PB8
45
DocID026429 Rev 3
-
MFX_I2C_SCL
-
-
-
-
-
-
-
-
-
-
4
-
1
-
7
-
-
-
-
-
SB23
-
SBx(1)
CN3
CN1
-
2
-
-
8
-
P3
-
9
-
P2
-
Power Supply
-
-
Free I/O
Idd Measure
-
-
-
E-paper Display
-
-
-
-
-
-
-
USB USER
NFC CR95HF-B
LED
PushButtons
VCP
TS_G3_IO3 Linear touch sensor
-
-
-
-
-
10
-
-
-
-
ePD1_SCK ePD1_RESET
-
-
-
-
-
-
11
-
-
-
-
ePD1_MOSI
-
-
-
-
-
-
-
GREEN
-
-
-
-
-
21
-
-
-
-
-
-
-
-
-
-
20
-
-
-
-
-
-
-
-
-
-
NFC_IRQOUTN NFC_IRQINN
-
-
-
MCU pin
-
-
-
-
-
-
SYSTEM
40
-
PB4
-
39
-
PB3
-
20
-
PB2
-
19
-
LQFP48 pin num.
PB1
-
Main function
UM1775
Hardware layout
Table 6. Extension connectors (continued)
Board function
27/39
38
PB13
26
PB14
27
PB15
28
PC13
2
28/39
DocID026429 Rev 3
-
MFX_IRQ_OUT
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
4
-
5
-
20
-
4
-
-
-
-
SBx(1)
CN3
CN1
-
-
21
-
P3
6
-
3
-
-
22
-
Free I/O
P2
-
-
-
Power Supply
3
-
E-paper Display
Linear touch sensor
USB USER
NFC CR95HF-B
LED
PushButtons
VCP
MFX_I2C_SDA Idd Measure
-
-
-
-
-
-
-
-
-
-
-
-
-
-
ePD1_D/C ePD1_PWR8ENn
-
-
-
-
-
-
-
-
23
-
-
-
-
-
-
-
-
-
-
23
-
-
-
-
-
-
-
-
-
-
22
-
-
-
-
-
-
-
-
-
-
-
NFC_MOSI NFC_MISO NFC_SCK NFC_NSS
-
-
-
MCU pin
-
-
-
-
-
-
SYSTEM
25
-
PB12
-
22
-
PB11
-
21
-
PB10
-
46
-
LQFP48 pin num.
PB9
-
Main function
Hardware layout
UM1775
Table 6. Extension connectors (continued)
Board function
48
VDD_USB
36
VDDA
9
-
-
-
-
-
-
-
-
-
VLCD
1
-
-
-
-
-
-
-
-
-
VSS
23
DocID026429 Rev 3
-
-
-
-
-
-
-
-
-
-
2
2
8
4(2)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
SBx(1)
CN3
CN1
P3
-
-
P2
-
-
Power Supply
Free I/O
Idd Measure
E-paper Display
Linear touch sensor
USB USER
NFC CR95HF-B
LED
PushButtons
VCP
-
-
PC14
PC15
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
5
-
-
-
-
3
-
-
-
-
-
-
-
PH1
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1
8
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
7
7
-
-
-
-
-
-
-
-
-
-
-
-
1
6
-
-
-
-
-
-
-
-
-
-
-
-
1
5
-
-
-
-
-
-
-
-
-
-
-
-
VDD VDD VDD 5V_OUT 5V_IN 3V3 5V_USB_USER
-
-
-
-
-
-
-
-
-
-
GND VDD
-
-
-
-
-
-
-
-
-
OSC_IN OSC32_OUT OSC32_IN SYSTEM
MCU pin
-
VDD
-
-
6
-
PH1
-
5
-
LQFP48 pin num.
PH0
-
-
Main function
4
-
24
-
-
-
PC15
-
VDD
-
-
-
3
-
-
-
PC14
-
-
UM1775
Hardware layout
Table 6. Extension connectors (continued)
Board function
29/39
38
Hardware layout
UM1775
Table 6. Extension connectors (continued)
30/39
DocID026429 Rev 3
SBx(1)
-
CN3
-
24
-
CN1
-
24
-
P3
-
6
25
1. Signals available depending on SBx value. Refer to Table 5: Solder bridges or schematics in Section 6.
2. Connected through a resistor
5
-
-
-
P2
-
-
10
-
-
-
25
-
-
-
-
NC GND GND GND Power Supply
-
-
-
Free I/O
-
-
-
Idd Measure
-
-
-
E-paper Display
-
-
-
-
-
-
-
USB USER
-
-
NFC CR95HF-B
-
8
LED
-
VSSA
PushButtons
47
VCP
VSS
SYSTEM
35
-
VSS
-
LQFP48 pin num.
Linear touch sensor
Board function
Main function
MCU pin
UM1775
5
Mechanical drawing
Mechanical drawing
Figure 12. STM32L053 discovery board mechanical drawing
DocID026429 Rev 3
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38
PB4
PB3
32/39
USB1_DM
USB1_DP
LD_R
LD_G
B_USER
TS_G2_IO3
TS_G2_IO4
TS_G1_IO3
TS_G1_IO4
DocID026429 Rev 3
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
Header 25
P3
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PB0
PB1
PB2
PB10
PB11
NC
GND
PC13
PC14
PC15
PH0
PH1
NRST
GND
TS_G3_IO2
USB1_DM TS_G3_IO3
USB1_DP
NFC_IRQINn
NFC_IRQOUTn
NFC_NSS
NFC_MOSI
NFC_MISO
NFC_SCK
LD_R
LD_G
B_USER
NRST
U_SENSOR_PB
SENSOR_PB.SchDoc
MCO
USART_RX
SWCLK
USART_TX
SWDIO
MFX_USART3_RX
MFX_USART3_TX
NRST
U_ST_LINK_V2-1
ST_LINK_V2-1.SCHDOC
NFC_IRQINn
NFC_IRQOUTn
NFC_NSS
NFC_MOSI
NFC_MISO
NFC_SCK
TS_G3_IO2
TS_G3_IO3
TS_G2_IO3
TS_G2_IO4
5V_OUT
5V_IN
MFX_I2C_SCL
MFX_I2C_SDA
TS_G3_IO2
TS_G3_IO3
TS_G2_IO3
TS_G2_IO4
TS_G1_IO3
TS_G1_IO4
USART_RX
USART_TX
USB1_DP
USB1_DM
LD_G
LD_R
PC13
PC14
PC15
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
PB8
PB9
PB10
PB11
PB12
PB13
PB14
PB15
NFC_IRQINn
NFC_IRQOUTn
NFC_NSS
USART_RX
NFC_MOSI
USART_TX
NFC_MISO
NFC_SCK
TS_G1_IO3
TS_G1_IO4
ePD1_BUSY
ePD1_RESET
TS_G2_IO3
ePD1_D/C
TS_G2_IO4
ePD1_CS
ePD1_SCK
TS_G3_IO2
ePD1_MOSI
TS_G3_IO3
ePD1_PWR_ENn
MFX_I2C_SCL
MFX_I2C_SDA
MFX_IRQ_OUT
MFX_WAKEUP
SWCLK
SWDIO
MCO
NRST
BOOT0
B_USER
MFX_WAKEUP
MFX_IRQ_OUT
MFX_I2C_SDA
MFX_I2C_SCL
MFX_USART3_RX
MFX_USART3_TX
U_IDD_measurement
IDD_measurement.SchDoc
SWCLK
SWDIO
MCO
NRST
PH0
PH1
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PA8
PA9
PA10
PA11
PA12
PA13
PA14
PA15
U_STM32Lx
STM32Lx.SchDoc
BOOT0
B_USER
PH0
PH1
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PA8
PA9
PA10
PA11
PA12
PA13
PA14
PA15
MFX_WAKEUP
MFX_IRQ_OUT
MFX_I2C_SDA
MFX_I2C_SCL
MFX_USART3_RX
MFX_USART3_TX
T_NRST
NRST
TS_G1_IO3
TS_G1_IO4
PA14
PA13
MCO
SWCLK
SWDIO
MFX_IRQ_OUT
MFX_WAKEUP
ePD1_PWR_ENn
ePD1_BUSY
ePD1_RESET
ePD1_D/C
ePD1_CS
ePD1_SCK
ePD1_MOSI
NFC_IRQINn
NFC_IRQOUTn
NFC_NSS
NFC_MOSI
NFC_MISO
NFC_SCK
USB1_DP
USB1_DM
LD_G
LD_R
PC13
PC14
PC15
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
PB8
PB9
PB10
PB11
PB12
PB13
PB14
PB15
BOOT0
PB7
PB6
PB5
PB4
PB3
PA15
PA14
PA13
PA12
PA11
PA10
PA9
PA8
PB15
PB14
PB13
PB12
NC
GND
Header 25
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
Reference: MB1143
Date: 22-May-14
Size: A4
Project: STM32L0538-DISCO
Title: STM32L053 Discovery
Sheet: 1 of 6
Revision: B-01
Rev A-01 --> PCB label MB1143 A-01
Rev B-01 --> PCB label MB1143 B-01, Layout of MOSFET modified
Idd Shunt resistors adjusted, Correction on CN1 and CN3
VDD
PB9
PB8
ePD1_PWR_ENn
ePD1_BUSY
ePD1_RESET
ePD1_D/C
ePD1_CS
ePD1_SCK
ePD1_MOSI
U_E-Paper_Display
E-Paper_Display.SchDoc
3V_OUT
ePD1_PWR_ENn
ePD1_BUSY
ePD1_RESET
ePD1_D/C
ePD1_CS
ePD1_SCK
ePD1_MOSI
6
NRST
USART_RX
USART_TX
MFX_USART3_RX
MFX_USART3_TX
Electrical schematics
UM1775
Electrical schematics
Figure 13. STM32L053 discovery
C6
R27
USB
1
2
3
4
5
6
USB-MINI-typeB
VCC
DD+
ID
GND
SHELL
CN2
SB14
R6
R8
R7
R5
TX
RX
1K5
0
USB_DM
0
USB_DP
100K
1
JP3
3V3_ST_LINK
SB2
SB3
T1
9013-SOT23
5V_USB_ST_LINK
USART_TX
MFX_USART3_TX
SB15
Close to JP
Not Fitted
AIN_1
OSC_IN
OSC_OUT
STM_RST
[NA]
3V3_ST_LINK
C18
100nF
4K7
R30
4K7
R29
MFX_USART3_RX
USART_RX
SB10
R31
100K
8MHz
20pF X1
20pF
3V3_ST_LINK 1
2
C7
Board Ident: PC13=0
VBAT
PC13
PC14
PC15
OSCIN
OSCOUT
NRST
VSSA
VDDA
PA0
PA1
PA2
R23
36K
R9
10K
R10
100
Not Fitted
STLINK_RX
1
2
3
4
5
6
7
8
9
10
11
12
3V3_ST_LINK
100K
R14
USB_RENUMn
JP1
T_JTCK
T_JTDO
T_JTDI
T_NRST
10K
R15
SWIM_IN
SWIM_RST
SWIM_RST_IN
10K
36
35
34
33
32
31
30
29
28
27
26
25
C8
C5
LED_STLINK
COM
R2
R3
100
100
3
2
4
1
R28
R35
R34
R33
R25
22
22
22
22
BAT60JFILM
T_SWO
T_NRST
C16
20pF
5V_USB_ST_LINK
5V_IN
R1
0
3V3_ST_LINK
D4
PWR_ENn
STPS1L30A
STPS1L30A
D3
STPS1L30A
D6
Not Fitted
MCO
5V_USB_USER
MCO
5 Volts From External
LD2
LED, red
100
S
PWR_ENn
D
G
R32
10K
S
CN4
1uF
C10
C11
SB11
SB6
SB5
SB4
STM_JTMS
STM_JTCK
SB13
PA14
PA13
10nF
C4
NC
PG
VO
LD39050PU33R
Reference: MB1143
Date: 26-May-14
Size: A4
Project: STM32L0538-DISCO
5
SWCLK
SWDIO
NRST
SWD
TP1
TP2
SWDIO
SWCLK
3V3_ST_LINK
Sheet: 2 of 6
C21
100nF
3V_OUT
3V3
3 Volts Output
100nF
C2
3V3_ST_LINK
ST-LINK Power
Revision: B-01
1uF
C20
5
3
4
1uF
C3
Title: ST-LINK/V2-1 with support of SWD only
VI
EN
U3
100nF
C19
6
1
BYPASS
Vout
LD3985M33R
INH
GND
Vin
U2
C9
100nF
3
1
5 Volts Output
5V_OUT
5V
1uF
T2
FDC606P
G
D
T_NRST
Jumpers ON --> DISCOVERY Selected
Jumpers OFF --> ST-LINK Selected
SB12
SB9
SB8
SB7
T3
STS7PF30L
T3 Not Fitted
SB1
AIN_1
T_JTMS
T_JTCK
[NA]
RC Must be very close to STM32F103 pin 29
R24
10K
D5
5 Volts From USB ST-LINK
R4
1K
3V3
R11
100
R22
LD_BICOLOR_CMS
_Green
Red
LD1
100nF 100nF 100nF 100nF
C15
C17
3V3_ST_LINK
T_SWDIO_IN
PWR_ENn
T_JTMS
T_JTCK
STM_JTMS
USB_DP
USB_DM
T_SWO
LED_STLINK
3V3_ST_LINK
1
2
3
4
5
6
Header 6
CN5
SWD
5V_USB_USER
TCK/SWCLK
TMS/SWDIO
DEFAULT
5V_IN
U1
STM32F103CBT6
3V3_ST_LINK
BAT60JFILM
BAT60JFILM
D1
1
2
3
4
D2
3V3_ST_LINK
VDD_2
VSS_2
JTMS/SWDIO
PA12
PA11
PA10
PA9
PA8
PB15
PB14
PB13
PB12
3V3_ST_LINK
R12
JP2
2K7
USB_RENUMn
STM_JTCK
R16
PA3
PA4
PA5
PA6
PA7
PB0
PB1
PB2/BOOT1
PB10
PB11
VSS_1
VDD_1
13
14
15
16
17
18
19
20
21
22
23
24
T_JRST
STLINK_TX
PWR_EXT
VDD_3
VSS_3
PB9
PB8
BOOT0
PB7
PB6
PB5
PB4/JNTRST
PB3/JTDO
PA15/JTDI
JTCK/SWCLK
48
47
46
45
44
43
42
41
40
39
38
37
SWIM_IN
SWIM
4K7
4
R26
3
2
1
2
3
4
4
5
6
7
8
2
GND
2
1
2
5
6
3
RESERVED
GND
DocID026429 Rev 3
7
UM1775
Electrical schematics
Figure 14. ST-LINK/V2-1 (SWD only)
33/39
38
DocID026429 Rev 3
PC15
PC14
PH0
MCO
SB20
PC14-OSC32_IN
PH0-OSC_IN
PC15-OSC32_OUT
R71
R70
0
0
Not Fitted
C53
100nF
VDDA
C54
1uF
Ferrite
L3
C44
100nF
C48
100nF
C52
100nF
6.8pF
C47
6.8pF
X2
XTAL_32K_20PPM
C50
C49
100nF
VDD
All this block must be very close to the STM32L053
SB19
Must be close to the Crystal
SB18
SB21
MCO
1
4
Must be close to the MCU
2
3
PA2
SB28
ePD1_PWR_ENn
MFX_WAKEUP
MFX_IRQ_OUT
PB10
PA1
PC13
NFC_IRQOUTn
NFC_NSS
NFC_MOSI
NFC_IRQINn
NFC_MISO
NFC_SCK
PB7
PB12
PB15
PB6
PB14
PB13
SB27
VLCD
PC13
PC14/OSC32_IN
PC15/OSC32_OUT
PH0/OSC_IN
PH1/OSC_OUT
NRST
VSSA
VDDA
PA0
PA1
PA2
PA4
PA5
1
2
3
4
5
6
7
8
9
10
11
12
PB7
BOOT0
PB8
PB9
PB7
VDD
PB8
PB9
MFX_WAKEUP
MFX_IRQ_OUT
ePD1_PWR_ENn
ePD1_BUSY
ePD1_RESET
ePD1_D/C
ePD1_CS
ePD1_SCK
ePD1_MOSI
NFC_IRQOUTn
NFC_NSS
NFC_MOSI
NFC_IRQINn
NFC_MISO
NFC_SCK
LD_G
LD_R
B_USER
TS_G1_IO4
PA4
PA5
PA6
TS_G2_IO3
PA6
PA7 SB26
TS_G2_IO4
PA7
PB0
TS_G3_IO2
SB25
PB0
SB24
PA3
VDDA
PA0
PA1
TS_G1_IO3
ePD1_BUSY
ePD1_RESET
ePD1_D/C
ePD1_CS
ePD1_SCK
ePD1_MOSI
LD_G
LD_R
PB4
PA5
510
VDD
PC13
PC14-OSC32_IN
PC15-OSC32_OUT
PH0-OSC_IN
PH1
NRST
PA8
PB2
PB11
PA15
PB3
PB5
B_USER
PA3
PA0
PA1
PA0
PA2
PH1
NRST
PC13
R65
MFX_I2C_SCL
MFX_I2C_SDA
Reference: MB1143
Date: 22-May-14
Size: A4
Project: STM32L0538-DISCO
Title: STM32L053C8T6 MCU
PB8
PB9
SWCLK
SWDIO
PA14
PA13
USB1_DP
USB1_DM
PA12
PA11
USART_TX
USART_RX
TS_G3_IO2
TS_G3_IO3
PB0
PB1
PA9
PA10
TS_G2_IO3
TS_G2_IO4
TS_G1_IO3
TS_G1_IO4
PB1
Sheet: 3 of 6
Revision: B-01
MFX_I2C_SCL
MFX_I2C_SDA
SWCLK
SWDIO
USART_TX
USART_RX
USB1_DP
USB1_DM
TS_G3_IO2
TS_G3_IO3
TS_G2_IO3
TS_G2_IO4
TS_G1_IO3
TS_G1_IO4
PB1
PA13
PA13
USB1_DP
PA12
USB1_DM SB16
PA11
PA10
SB17
PA10
PA9
PA9
PA8
PA8
PB15
PB15
PB14
PB14
PB13
PB13
PB12
PB12
VDD
U8
STM32L053C8T6
PA6
PA7
PA2
PA3
PB11
PB11
PB10
PB10
PB2
PB2
TS_G3_IO3
SB23
VDD
VDD_USB
VSS_2
PA13
PA12
PA11
PA10
PA9
PA8
PB15
PB14
PB13
PB12
36
35
34
33
32
31
30
29
28
27
26
25
PB6
PB6
PB5
PB5
PB4
PB4
PB3
PB3
PA15
PA15
PA14
PA14
48
47
46
45
44
43
42
41
40
39
38
37
VDD_3
VSS_3
PB9
PB8
BOOT0
PB7
PB6
PB5
PB4
PB3
PA15
PA14
PA3
PA4
PA5
PA6
PA7
PB0
PB1
PB2
PB10
PB11
VSS_1
VDD_1
34/39
13
14
15
16
17
18
19
20
21
22
23
24
BOOT0
PA12
PA11
Electrical schematics
UM1775
Figure 15. STM32L053C8T6 MCU
PB10
ePD1_PWR_ENn
R44
10K_1%_0402
3V3
D
G
D
S
G
ePD1_BUSY
ePD1_RESET
ePD1_D/C
ePD1_CS
ePD1_SCK
ePD1_MOSI
S
T5 Not Fitted
ePD1_BUSY
ePD1_RESET
ePD1_D/C
ePD1_CS
ePD1_SCK
ePD1_MOSI
100nF_X7R_0603
ePD1_PWR_ENn
PA8
PB2
PB11
PA15
PB3
PB5
STLM75DS2F
3
T6
FDC606P
R43
10_1%_0805
T5
STS7P2UH7
1
2
3
4
R41
VDD_ePD1
C25
R37
10K_1%_0402
R42
2.2K_1%_0603
VDD_ePD1
1μF_X5R_0603
SDA
SCL
OS/INT
VSS
1
2
3
4
4
5
6
7
8
C26
C35
1μF_X5R_0603
C33
R36
10K_1%_0402
VDD_ePD1
1μF_X5R_0603
VDD_ePD1
U5
8
VDD
7
A0
C37
6
A1
5
A2
1μF_X5R_0603
C31
C30
C27
10μF_X5R_0603
1
3
C29
D8
MBR0530
1μF_X5R_0603
VDD_ePD1
1μF_X5R_0603
2.2K_1%_0603
C28
D7
BAT54SFILM
C22
1μF_X5R_0603
2
1μF_X5R_0603
3
1
T4
SI1304BDL
C23
R38
6R8_1%_0805
C24
2
22μH 0,5A 20%
2.2μF_X5R_0603
L1
1μF_X5R_0603
VDD_ePD1
1μF_X5R_0603
DocID026429 Rev 3
1
2
5
6
CON_GDE021A1_EPD
NC
GDR
RESE
VGL
VGH
TSCL
TSDA
BS1
BUSY
RES#
D/C#
CS#
D0
D1
VDDIO
VCI
VSS
VDD
VPP
VSH
PREVGH
VSL
PREVGL
VCOM
P1
Reference: MB1143
Date: 26-May-14
Size: A4
Project: STM32L0538-DISCO
Title: Electronic Paper Display
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Must be used with CON_GDE021A1_EPD
Electronic Paper Display
GDE021A1, 2.04", 172×72 dots
EPD_GDE021A1
U4
Sheet: 4 of 6
Revision: B-01
UM1775
Electrical schematics
Figure 16. Electronic paper display
35/39
38
1
1
LS_P1
C14
47nF
R18
10K
2
2
LS_P2
R19
10K
LS_P3
3
3
C12
47nF
TS_G2_IO4
PA3
PA2
TS_G2_IO3
TS_G3_IO3
PA7
PA6
TS_G3_IO2
PB1
PB0
Linear Touch Sensor made of 3 electrodes
C13
47nF
TS_G1_IO4
TS_G1_IO3
R17
10K
NFC_IRQINn
NFC_MISO
NFC_SCK
2
4
6
8
8
6
4
2
1
3
5
7
female conn 4X2
7
5
3
1
CN1
C1
100nF
PB4
PA5
LD_G
LD_R
NFC
LD_G R60
330
LD_R R69
1K
NFC kit reference: CR95HF-B
NFC_IRQOUTn
NFC_NSS
NFC_MOSI
LED, green
LED, red
LD3
LD4
3V3
PB7
PB12
PB15
Operating Voltage: +3.3V
PB6
PB14
PB13
PA0
1
2
3
4
5
6
NRST
SB22
RESET Button
NRST
B_USER
100nF
C55
SB29
C51
100nF
10K
R73
R74
[NA]
VDD
R72
10K
USB1_DM
USB1_DP
Reference: MB1143
Date: 22-May-14
Size: A4
Project: STM32L0538-DISCO
Sheet: 5 of 6
Revision: B-01
Title: Linear Touch Sensor, NFC, USB and Push Button
B_USER
VDD
0
USB1_DM
0
USB1_DP
100K
USER & WAKE-UP Button
R21
R20
R13
5V_USB_USER
USB-MINI-typeB
VCC
DD+
ID
GND
SHELL
CN3
USB User
4
1
3
2
4
1
DocID026429 Rev 3
3
2
SW-PUSH-CMS_BLUE
B1
36/39
SW-PUSH-CMS_BLACK
B2
Linear Sensor
LS1
PA11
PA12
Electrical schematics
UM1775
Figure 17. Linear touch sensor, NFC, USB and pushbutton
3
5
6
7
8
1
2
3
3V3
VDD
JP4
R58
10K_1%_0402 R59
1_1%_0805
C41
100nF
C38
100nF
C42
100nF
3V3
4
MFX_IDD_CAL
T11
FDC606P
T12
STS7P2UH7
R56
10K_1%_0402
G
D
D
S
S
G
T12, T14 Not Fitted
C34
100nF
T13
T14
FDC606P
STS7P2UH7
MFX_IDD_SH0
1
2
5
6
4
3V3
C36
1uF
Ferrite
L2
S
D
C40
100nF
G
1
2
3
4
3
VDDA_L1
G
3V3
VDDA_L1
10K
C39
1uF
0
1
2
3
4
5
6
7
8
9
10
11
12
R57
10K_1%_0805
3
5
6
7
8
1
2
5
6
4
R53
10K_1%_0402 R52
24_1%_0805
T7
T8
FDC606P
STS7P2UH7
MFX_IDD_SH1
1
2
3
4
510
VLCD
PC13
PC14/OSC32_IN
PC15/OSC32_OUT
PH0/OSC_IN
PH1/OSC_OUT
NRST
VSSA
VDDA
PA0
PA1
PA2
3V3
differential amplifier
MFX_IDD_MEAS
MFX_WAKEUP
R47
C32
100nF
R40
10K
3V3
R39
R45
MFX_IDD_SH0
MFX_IRQ_OUT
S
D
4
5
6
7
8
1
2
5
6
MFX_IRQ_OUT
G
3
S
3V3
VDD_2
VSS_2
PA13
PA12
PA11
PA10
PA9
PA8
PB15
PB14
PB13
PB12
1
2
3
5
6
7
8
1
2
5
6
4
T8, T10 Not Fitted
R54
10K_1%_0402 R55
620_1%_0805
6
5
13
12
36
35
34
33
32
31
30
29
28
27
26
25
MFX_USART3_RX
MFX_USART3_TX
4
10K
MFX_SWCLK
MFX_I2C_SDA
MFX_I2C_SCL
MFX_I2C_ADDRR49
MFX_VDD_MCU
T9
T10
FDC606P
STS7P2UH7
MFX_IDD_SH2
D
MFX
Multi Function eXpander
G
S
D
1
G
S
D
48
47
46
45
44
43
42
41
40
39
38
37
VDD_3
VSS_3
PB9
PB8
BOOT0
PB7
PB6
PB5
PB4
PB3
PA15
PA14
PA3
PA4
PA5
PA6
PA7
PB0
PB1
PB2
PB10
PB11
VSS_1
VDD_1
13
14
15
16
17
18
19
20
21
22
23
24
S
D
All this block must be very close to the STM32L152
3
G
14
R63
1K_0.1%_0402
U7D
TSZ124IPT
R66
1K_0.1%_0402
U7B
C45
TSZ124IPT
100nF
7
5V
MFX_IDD_SH1
MFX_IDD_SH2
MFX_IDD_CAL
MFX_SWDIO
3V3
U6
STM32L152CCT6
2
U7C
TSZ124IPT
8
100nF
V-
V+
1
2
3
4
R46
2K2
MFX_I2C_SCL
MFX_USART3_RX
MFX_USART3_TX
MFX_SWDIO
MFX_SWCLK
MFX_IDD_MEAS
3V3
MFX_I2C_SDA
MFX_I2C_SDA
MFX_I2C_SCL
U7A
TSZ124IPT
1
CN6
R48
2K2
3V3
MFX_USART3_RX
MFX_USART3_TX
Reference: MB1143
Date: 26-May-14
Size: A4
Project: STM32L0538-DISCO
Sheet: 6 of 6
Revision: B-01
Title: IDD measurement / MFX (Multi Function eXpander)
C43
5V
R62
100
49K9_0.1%_0402
R61
R68
4K7_1%_0402
R64
49K9_0.1%_0402
9
10
100nF
C46
R67
100K_1%_0402
3
3V3
Not Fitted
R50
1K_1%_0402
VDD
R51
100K
4
11
DocID026429 Rev 3
2
UM1775
Electrical schematics
Figure 18. IDD measurement / MFX (multi-function expander)
37/39
38
Revision history
7
UM1775
Revision history
Table 7. Document revision history
Date
Revision
20-Jun-2014
1
initial release
24-Jun-2014
2
Removed embedded USB bootloader paragraph.Rev 3
3
mbed-enabled logo added on the cover page.
Added mbed-enabled in Section 3: Features.
Added Section 2.1: Product marking
Windows Vista removed from Section 4.1.1: Drivers.
SB14, SB15 swapped with SB2, SB3 in Table 5: Solder
bridges, default position of SB2,SB3 set to ON and
ports modified from PB4, PB3 to PA10, PA9.
Added Section 4.1.3: VCP configuration
20-Jan-2016
38/39
Changes
DocID026429 Rev 3
UM1775
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