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
June 2014DocID0229 Rev 21/39
www.st.com
ContentsUM1775
Contents
12
Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Ordering and product information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1
Order code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
34
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Hardware layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1
Embedded ST-LINK/V2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.1.14.1.24.1.34.1.4
Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12ST-LINK/V2-1 firmware upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Using ST-LINK/V2-1 to program/debug the STM32L053 on board . . . 14Using ST-LINK/V2-1 to program/debug an external STM32 application 15
4.2Power supply and power selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.2.14.2.2
Power supply input from the USB connector . . . . . . . . . . . . . . . . . . . . . 17External power supply inputs: 5V_IN or USB USER CN3 . . . . . . . . . . . 17
4.34.44.54..74.84.94.104.114.124.134.144.15
LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Pushbuttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18NFC connector for PLUG-CR95HF-B board . . . . . . . . . . . . . . . . . . . . . . 19Electronic Paper Display (EPD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20JP4 (Idd) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20BOOT0 configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Linear touch sensor / touch keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21USB device support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22USART configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22OSC clock supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22OSC 32 kHz clock supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Solder bridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Extension connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
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Mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31Electrical schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
DocID0229 Rev 2
UM1775Contents
7Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
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3List of tablesUM1775
List of tables
Table 1.Table 2.Table 3.Table 4.Table 5.Table 6.Table 7.
ON/OFF conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Jumper states. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Debug connector CN5 (SWD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15NFC connector pin-out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Solder bridges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Extension connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
4/39DocID0229 Rev 2
UM1775List 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1STM32L053 discovery hardware block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Top layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Bottom layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Updating the list of drivers in device manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13STM32L053 discovery board connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14ST-LINK connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16NFC board plugged on STM32L053 discovery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Jumper on position OFF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Jumper on position ON. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21No Jumper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21STM32L053 discovery board mechanical drawing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31STM32L053 discovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32ST-LINK/V2-1 (SWD only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33STM32L053C8T6 MCU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34Electronic paper display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35Linear touch sensor, NFC, USB and pushbutton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36IDD measurement / MFX (Multi Function eXpander) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
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5ConventionsUM1775
1 Conventions
Table 1 provides the definition of some conventions used in the present document.
Table 1. ON/OFF conventions
Convention
Jumper JPx ONJumper JPx OFFSolder bridge SBx ONSolder bridge SBx OFF
Jumper fittedJumper not fitted
SBx connections closed by SolderSBx connections left open
Definition
6/39DocID0229 Rev 2
UM1775Ordering and product information
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.
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38FeaturesUM1775
3 Features
The STM32L053 discovery board offers the following features: •••
STM32L053C8T6 microcontroller featuring 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 portMass storageDebug port
Board power supply: through USB bus or from an external 5 V supply voltageExternal application power supply: 3 V and 5 VOne 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 communicationLD2 (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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UM1775Hardware layout
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 diagramDocID0229 Rev 29/39
38Hardware layout
Figure 3. Top layoutUM1775
67/,1.986%67/,1./'&2086%86(5/'3:5&167/,1.',6&29(5 Figure 4. Bottom layoutHardware layout 6%UHVHUYHG6%GHIDXOW6%15676%670B5676%5;7;6%;FU\\VWDO;FU\\VWDO670/&76%86%B86(56%0&26%26&B,16%%5(6(76%WRXFKVHQVRU6%%86(5069DocID0229 Rev 211/39 38Hardware layoutUM1775 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-enumerationVirtual com port interface on USBMass storage interface on USB USB power management request for more than 100 mA power on USBSWIM interface Minimum supported application voltage limited to 3 V Features not supported on ST-LINK/V2-1: 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). Table 2. Jumper states Jumper state Description ST-LINK/V2-1 functions enabled for on board programming (default)ST-LINK/V2-1 functions enabled for application through external CN5 connector (SWD supported) Both CN4 jumpers ONBoth CN4 jumpers OFF 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. 12/39DocID0229 Rev 2 UM1775Hardware layout 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. DocID0229 Rev 213/39 38Hardware layoutUM1775 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 14/39DocID0229 Rev 2 UM1775Hardware layout 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) Pïn123456 CN5 VDD_TARGETSWLCKGNDSWDIONRSTSWO Designation VDD from applicationSWD clockGround SWD data input/outputRESET of target MCUReserved DocID0229 Rev 215/39 38Hardware layout Figure 7. ST-LINK connections UM1775 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. 16/39DocID0229 Rev 2 UM1775Hardware 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.• 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:1.2. 3. 4. Connect the external power source to 5V_IN or USB USER CN3.Power on the external power supply 5V_IN or USB USER CN3.Check that LD2 is turned ON. 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: DocID0229 Rev 217/39 38Hardware layout 1. UM1775 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. 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). 2. 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. 18/39DocID0229 Rev 2 UM1775Hardware layout 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 DocID0229 Rev 219/39 38Hardware layout The NFC board can be accessed in SPI or UART mode. Table 4. NFC connector pin-out CN1 pin 12345678 NFC signalsNFC_IRQOUTN or UART1_TXNFC_IRQINN or UART1_RXNFC_NSSNFC_MISONFC_MOSINFC_SCK+3V3GND STM32L053C8T6PB7PB6PB12PB14PB15PB13 Description Interrupt output for NFC connected to STM32L053C8T6 UART1 RX UM1775 Interrupt input for CR95HF connected to STM32L053C8T6 UART1 TXSPI slave selectSPI data, slave outputSPI data, slave inputSPI serial clock Main power supply/power supply for RF driversGround 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 20/39DocID0229 Rev 2 UM1775Hardware layout • 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. DocID0229 Rev 221/39 38Hardware layoutUM1775 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) 22/39DocID0229 Rev 2 UM1775Hardware layout 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: ––– Note: SB18 closedSB19 openR70 removed Please refer to the AN2867 for oscillator design guide for STM32 microcontrollers. DocID0229 Rev 223/39 38Hardware layoutUM1775 4.14 Solder bridges Table 5. Solder bridges Bridge State(1)DescriptionOFFON SB7,8,9,12 (default)SB4,5,6,11 (reserved)SB2,3 (reserved)SB29 (B2-RESET) ON OFFOFFON OFFONOFFOFF ON SB16, 17 (USB_USER)SB23,24,25,26,27,28 (touch sensor)SB1 (ST-LINK PWR) OFF ONOFFONON OFFOFF ON SB13 (NRST) ON OFF SB10 (STM_RST) OFFONONOFF 1.Default value is in bold. SB18, 19 (X2 crystal) X2, C47, C50, R70 and R71 provide a clock. PC14, PC15 are disconnected from P3. PC14, PC15 are connected from P3. Remove only R70 and R71Reserved, do not modify Reserved, do not modify Reserved, do not modify B2 Push Button is connected to NRST of STM32L053C8T6B2 Push Button is not connected to NRST of STM32L053C8T6B1 Push Button is connected to PA0B1 Push Button is not connected to PA0 PA2, PA3 of STM32F103CBT6 are not connected to PB4, PB3 of STM32L053C8T6 PA2, PA3 of STM32F103CBT6 are connected to PB4, PB3 of STM32L053C8T6USB1_DP and USB1_DM are dedicated to the USB USER connector CN3USB1_DP is connected to PA12 and USB1_DM is connected to PA11. Both are available as GPIO on P2, P3 headers. PA2, PA3, PA6, PA7, PB0, PB1 are dedicated to touch sensor. PA2, PA3, PA6, PA7, PB0, PB1 are available as GPIO on P2, P3 headers.ST-LINK module is poweredST-LINK module is not powered Clock signal from header P3.7 is connected to OSC_IN of STM32L053C8T6 or PH0 is available as GPIO. SB20 must be OFF No connection between header P3.7 and PH0 of STM32L053C8T6 T_NRST signal from connector CN5 and STM32F103CBT6, is connected to NRST of STM32L053C8T6T_NRST signal is not connected No incidence on NRST signal of STM32F103CBT6NRST signal of STM32F103CBT6 is connected to GND MCO clock signal from STM32F103CBT6 is connected to OSC_IN of STM32L053C8T6. SB21 must be OFFMCO signal of STM32F103CBT6 is not used. SB22 (B1-USER) SB14, 15 (RX, TX) SB21 (OSC_IN) SB20 (MCO) 24/39DocID0229 Rev 2 UM1775Hardware layout 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 LQFP48 pin num.Board functionLinear touch sensorE-paper DisplayNFC CR95HF-BNRSTBOOT0SYSTEMPower SupplyMain functionPushButtonsIdd MeasureUSB USERFree I/OBOOT0446 ---------------------NRST79 -----------PA010 BP_USER-11 ------------PA111 MFX_WAKEUP12 ------------TS_G1_IO4TS_G1_IO3PA21213 PA31314 PA4PA5 1415 PA41516 ------------RED------------TS_G2_IO3PA61617 DocID0229 Rev 225/39 38SB26--------------SB27------------SB28----------------SBx(1)VCPLEDCN1CN3P2P326/39 PA9Main functionMCU pinPA8PA7PA11PA14PA13PA12PA10 LQFP48 pin num.SYSTEMVCPPushButtonsLEDNFC CR95HF-B-USB USERTS_G2_IO4Linear touch sensor----18-19 ----17 --2(2)-SB17---------18 E-paper DisplayIdd MeasureFree I/OPower SupplyP2P3---SB25CN1CN3SBx(1)SB163237343331302917 SWCLKSWDIO----------13141516-------------------------ePD1_BUSY-USB_DPUSB_DM---------------------------USART_RXUSART_TX--------Board function PA15 Hardware layout TS_G3_IO2PB018 38 -------------Table 6. Extension connectors (continued) DocID0229 Rev 2 --3(2)----------ePD1_CS-------12 -UM1775 SB2419 -----UM1775 PB8Main functionMCU pin LQFP48 pin num.SYSTEMVCPPushButtonsLEDNFC CR95HF-B-USB USERTS_G3_IO3Linear touch sensor----11--10 ----------21 ----20 E-paper DisplayIdd MeasureFree I/OPower SupplyP2P3------SB23CN1CN3SBx(1)-43424140392019 -------ePD1_MOSI---9------------------GREEN---------------------------78------ePD1_SCKePD1_RESETPB7 PB6 PB5 PB4 PB3 PB2 PB1 45 -----NFC_IRQOUTNNFC_IRQINN--Table 6. Extension connectors (continued) DocID0229 Rev 2 -12------Board function MFX_I2C_SCL--4 ---Hardware layout 27/39 -3828/39 PB9Main functionMCU pinPB11PB15PB14PB13PB12PB10 LQFP48 pin num.SYSTEMVCPPushButtonsLEDNFC CR95HF-B-------23-22 USB USERLinear touch sensorE-paper DisplayMFX_I2C_SDAIdd Measure--3 Free I/OPower SupplyP2-3------------P3CN1CN3SBx(1)46282726252122 -----------------------------------------20212223---------------------ePD1_D/CePD1_PWR8ENnBoard function Hardware layout PC132 -----NFC_MOSINFC_MISONFC_SCKNFC_NSS--Table 6. Extension connectors (continued) DocID0229 Rev 2 -546---------MFX_IRQ_OUT---4 --UM1775 -PH1 PH0 UM1775 PC15 PC14 VDD-MCU pin---Main functionVDD VDD_USB VDDA VLCD 4365--------------8 --PH1---7 ------------------PC15--6 -----------------PC14--5 -----------------VCPPushButtonsLEDNFC CR95HF-BUSB USERLinear touch sensorE-paper DisplayIdd MeasureFree I/OPower SupplyP2P3--1---------------CN1CN3SBx(1)--------OSC_INOSC32_OUTOSC32_INSYSTEM---LQFP48 pin num.24 --------------------VSS 36 48 1 9 23 ----------------------------Table 6. Extension connectors (continued) DocID0229 Rev 2 51--31-7 --------------------Board function --------GNDVDD-VDDVDDVDD5V_OUT5V_IN3V35V_USB_USER2 ---2 ---8 ---4(2) ---Hardware layout 29/39 ----38Hardware layout Table 6. Extension connectors (continued) MCU pin LQFP48 pin num.Board functionLinear touch sensorUM1775 E-paper DisplayNFC CR95HF-BNCGNDGNDGNDPower SupplyMain functionPushButtonsIdd MeasureUSB USERSYSTEMFree I/OVSSVSSVSSA-35478-25-1025-56------------------------------------2424 -----------1.Signals available depending on SBx value. Refer to Table 5: Solder bridges or schematics in Section 6.2.Connected through a resistor 30/39DocID0229 Rev 2 ----SBx(1)VCPCN1CN3LEDP2P3UM1775Mechanical drawing 5 Mechanical drawing Figure 12. STM32L053 discovery board mechanical drawing DocID0229 Rev 231/39 3832/39 U_STM32LxSTM32Lx.SchDocU_E-Paper_DisplayE-Paper_Display.SchDocMCOSWCLKSWDIOPA14PA13T_NRSTePD1_PWR_ENnePD1_PWR_ENnNRSTePD1_BUSYePD1_RESETePD1_D/CePD1_CSePD1_SCKePD1_MOSIePD1_BUSYePD1_RESETePD1_D/CePD1_CSePD1_SCKePD1_MOSITS_G1_IO3TS_G1_IO4TS_G2_IO3TS_G2_IO4TS_G3_IO2TS_G3_IO3BOOT0B_USERBOOT0B_USERLD_GLD_RUSB1_DPUSB1_DMUSB1_DPUSB1_DMElectrical schematics U_ST_LINK_V2-1ST_LINK_V2-1.SCHDOCPB4PB3USART_RXUSART_TXMFX_USART3_RXMFX_USART3_TXMCOUSART_RXSWCLKUSART_TXSWDIOMFX_USART3_RXMFX_USART3_TXNRSTU_SENSOR_PBSENSOR_PB.SchDocNRSTNRSTB_USERPH0PH1PH0PH1LD_GLD_RPC13PC14PC15PC13PC14PC15TS_G1_IO3TS_G1_IO4B_USERLD_RLD_GLD_RLD_GTS_G2_IO3TS_G2_IO4PA0PA1PA2PA3PA4PA5PA6PA7PA8PA9PA10PA11PA12PA13PA14PA15PA0PA1PA2PA3PA4PA5PA6PA7PA8PA9PA10PA11PA12PA13PA14PA15PB0PB1PB2PB3PB4PB5PB6PB7PB8PB9PB10PB11PB12PB13PB14PB15PB0PB1PB2PB3PB4PB5PB6PB7PB8PB9PB10PB11PB12PB13PB14PB15USB1_DMUSB1_DP6 Electrical schematics NRSTNRSTMCOSWCLKSWDIOMCOSWCLKSWDIOUSART_RXUSART_TXTS_G1_IO3TS_G1_IO4P23V_OUTPB9PB8VDDFigure 13. STM32L053 discovery DocID0229 Rev 2 NFC_IRQINnNFC_IRQOUTnNFC_NSSNFC_MOSINFC_MISONFC_SCKNFC_IRQINnNFC_IRQOUTnNFC_NSSNFC_MOSINFC_MISONFC_SCK5V_IN5V_OUTTS_G3_IO2TS_G3_IO3ePD1_PWR_ENnMFX_IRQ_OUTMFX_WAKEUPMFX_I2C_SCLMFX_I2C_SDATS_G3_IO2USB1_DMTS_G3_IO3USB1_DPNFC_IRQINnNFC_IRQOUTnNFC_NSSNFC_MOSINFC_MISONFC_SCKP3TS_G2_IO3TS_G2_IO4GNDPC13PC14PC15PH0PH1NRSTNFC_IRQINnNFC_IRQOUTnNFC_NSSUSART_RXNFC_MOSIUSART_TXNFC_MISONFC_SCKTS_G1_IO3TS_G1_IO4ePD1_BUSYePD1_RESETTS_G2_IO3ePD1_D/CTS_G2_IO4ePD1_CSePD1_SCKTS_G3_IO2ePD1_MOSITS_G3_IO3ePD1_PWR_ENnMFX_I2C_SCLMFX_I2C_SDAMFX_IRQ_OUTMFX_WAKEUPePD1_BUSYePD1_RESETePD1_D/CePD1_CSePD1_SCKePD1_MOSIBOOT0PB7PB6PB5PB4PB3PA15PA14PA13PA12PA11PA10PA9PA8PB15PB14PB13PB12NCGND123456710111213141516171819202122232425Header25U_IDD_measurementIDD_measurement.SchDocMFX_WAKEUPMFX_IRQ_OUTMFX_I2C_SDAMFX_I2C_SCLMFX_USART3_RXMFX_USART3_TXMFX_WAKEUPMFX_IRQ_OUTMFX_I2C_SDAMFX_I2C_SCLMFX_USART3_RXMFX_USART3_TX123456710111213141516171819202122232425PA0PA1PA2PA3PA4PA5PA6PA7PB0PB1PB2PB10PB11NCGNDRevA-01-->PCBlabelMB1143A-01RevB-01-->PCBlabelMB1143B-01,LayoutofMOSFETmodifiedIddShuntresistorsadjusted,CorrectiononCN1andCN3Header25Title:STM32L053DiscoveryProject:STM32L0538-DISCOSize:A4Reference:MB1143Date:22-May-14Revision:B-01Sheet:1of6UM1775 UM1775 D25V_INT_NRSTTCK/SWCLKTMS/SWDIOPA14PA13SB13SWCLKSWDIONRST4K7R15R14100K3V3_ST_LINKJP2R28AIN_12K7R16BAT60JFILMR2410KD5[NA]BAT60JFILMR25T_JTCKBAT60JFILMD15V_USB_USERSWDR2610KBoardIdent:PC13=0R27SWIM_INSWIMPWR_EXT[NA]USB_RENUMnSTM_JTCKSWDCN522SB7T_JTMSDEFAULTSWIM_INSWIM_RSTSWIM_RST_INRESERVED48474544434241403938373V3_ST_LINKU1STM32F103CBT6R3322R34T_NRSTSB4SB5SB6SB113V3_ST_LINKSTM_JTCKSWCLKTP2STM_JTMSSB8SB9SB12C7Header63V3_ST_LINK22R35T_SWOC622123456SWDIOTP1R31100K100MCOOSC_INOSC_OUTSTM_RSTSTM_JTMSUSB_DPUSB_DMT_SWOLED_STLINKRCMustbeveryclosetoSTM32F103pin29MCOC1620pFCN4R22R11100SB103V3_ST_LINKC18100nF4K7R304K7R29PWR_ENnT_JTMST_JTCKAIN_11234567101112VBATPC13PC14PC15OSCINOSCOUTNRSTVSSAVDDAPA0PA1PA2VDD_2VSS_2JTMS/SWDIOPA12PA11PA10PA9PA8PB15PB14PB13PB12363534333231302928272625NotFittedJumpersON-->DISCOVERYSelectedJumpersOFF-->ST-LINKSelectedPA3PA4PA5PA6PA7PB0PB1PB2/BOOT1PB10PB11VSS_1VDD_1ClosetoJPNotFitted131415161718192021222324T_SWDIO_INT_JTCKT_JTDOT_JTDIT_NRSTT_JRST2USART_TXMFX_USART3_TX10KSB2SB14NotFitted3V3_ST_LINKC15100nF100nF100nF100nFC17C8C5JP1R123V3_ST_LINKLD2LED,redD45V_USB_USERC10C9100nFC444Figure 14. ST-LINK/V2-1 (SWD only)123567834GNDGNDUSB1USB_RENUMnT19013-SOT23R10100R2336KR910K1256223CN2R3210KPWR_ENnG1uFLD1T2FDC606P100nF7DocID0229 Rev 2 3V33V3_ST_LINKR41KJP3STLINK_RXSB1STLINK_TX12348MHzVDD_3VSS_3PB9PB8BOOT0PB7PB6PB5PB4/JNTRSTPB3/JTDOPA15/JTDIJTCK/SWCLK20pFX120pF3V3_ST_LINK12MFX_USART3_RXUSART_RXSB15U213VinLD3985M33RVoutINHGNDST-LINKPower53V3_ST_LINKC2BYPASSSB3TXRX100nFC3T3NotFittedSTPS1L30AD65V_INSTPS1L30AD35V_USB_ST_LINKSPWR_ENn1uFT3STS7PF30L10nF1uF5V_USB_ST_LINK5VoltsFromExternalGD5VoltsOutput5V_OUT5VU361VIENLD39050PU33RPGVO343VoltsOutput3V_OUT3V33V3_ST_LINK5VoltsFromUSBST-LINKSTPS1L30ASDC11C19NC5C201uFC21100nFR6R8R7R51K50USB_DM0USB_DP100KVCCD-D+IDGNDSHELL123456COMLED_STLINKR3100R21002Red1USB-MINI-typeB3_Green4R10LD_BICOLOR_CMS3V3_ST_LINKTitle:ST-LINK/V2-1withsupportofSWDonlyProject:STM32L0538-DISCOSize:A4Reference:MB1143Date:26-May-14Revision:B-01Sheet:2of6Electrical schematics 33/39 384847454443424140393837MustbeclosetotheMCUPC13VDD_3VSS_3PB9PB8BOOT0PB7PB6PB5PB4PB3PA15PA14C47R70PA312PC14SB27X2XTAL_32K_20PPMC506.8pF6.8pFPA4PA5PC14-OSC32_IN0PA3131415161718192021222324PA3PA4PA5PA6PA7PB0PB1PB2PB10PB11VSS_1VDD_14334/39 BOOT0R65PB8PB9VDD510PB7PB7BOOT0PB8PB9PB6PB6PB5PB5PB4PB4PB3PB3PA15PA15PA14PA14U8STM32L053C8T6VDDPA12PA11PH1NRSTPA0PA1SB28VDDAPA0PA1TS_G1_IO3VDDPC13PC14-OSC32_INPC15-OSC32_OUTPH0-OSC_INPH1NRSTPA2PA21234567101112VLCDPC13PC14/OSC32_INPC15/OSC32_OUTPH0/OSC_INPH1/OSC_OUTNRSTVSSAVDDAPA0PA1PA2VDD_USBVSS_2PA13PA12PA11PA10PA9PA8PB15PB14PB13PB12363534333231302928272625PA13PA13USB1_DPPA12USB1_DMSB16PA11PA10SB17PA10PA9PA9PA8PA8PB15PB15PB14PB14PB13PB13PB12PB12VDDPB1R710TS_G1_IO4PA4PA5PA6TS_G2_IO3PA6PA7SB26TS_G2_IO4PA7PB0TS_G3_IO2SB25PB0SB24PB11PB11PB10PB10PB2PB2TS_G3_IO3SB23PB1Electrical schematics MCOMCOSB20PH0PH0-OSC_INSB21SB18Figure 15. STM32L053C8T6 MCUDocID0229 Rev 2 NotFittedPA0PB4PA5LD_GLD_RB_USERB_USERLD_GLD_RPB7PB12PB15PB6PB14PB13NFC_IRQOUTnNFC_NSSNFC_MOSINFC_IRQINnNFC_MISONFC_SCKNFC_IRQOUTnNFC_NSSNFC_MOSINFC_IRQINnNFC_MISONFC_SCKVDDC44100nFC48100nFC49100nFC52100nFPA8PB2PB11PA15PB3PB5PB10PA1PC13ePD1_BUSYePD1_RESETePD1_D/CePD1_CSePD1_SCKePD1_MOSIePD1_PWR_ENnMFX_WAKEUPMFX_IRQ_OUTePD1_BUSYePD1_RESETePD1_D/CePD1_CSePD1_SCKePD1_MOSIePD1_PWR_ENnMFX_WAKEUPMFX_IRQ_OUTMustbeclosetotheCrystalPC15PC15-OSC32_OUTSB19PA2PA3PA6PA7PB0PB1PA12PA11TS_G1_IO3TS_G1_IO4TS_G2_IO3TS_G2_IO4TS_G3_IO2TS_G3_IO3USB1_DPUSB1_DMTS_G1_IO3TS_G1_IO4TS_G2_IO3TS_G2_IO4TS_G3_IO2TS_G3_IO3USB1_DPUSB1_DMAllthisblockmustbeveryclosetotheSTM32L053VDDAL3PA9PA10PA14PA13PB8PB9USART_TXUSART_RXSWCLKSWDIOMFX_I2C_SCLMFX_I2C_SDAUSART_TXUSART_RXSWCLKSWDIOMFX_I2C_SCLMFX_I2C_SDATitle:STM32L053C8T6MCUProject:STM32L0538-DISCOSize:A4Reference:MB1143Date:22-May-14Revision:B-01Sheet:3of6C53100nFFerriteC541uFUM1775 UM1775 VDD_ePD1L122μH0,5A20%C221μF_X5R_06031233C2710μF_X5R_0603D7BAT54SFILM12T4SI1304BDLR386R8_1%_0805U4VDD_ePD1ElectronicPaperDisplayGDE021A1,2.04\",172×72dotsD8MBR05300R3610K_1%_0402VDD_ePD1EPD_GDE021A1P1VDD_ePD1U58VDD7A0C376A15A2SDASCLOS/INTVSSR42R412.2K_1%_06032.2K_1%_06031234Figure 16. Electronic paper display1μF_X5R_06031μF_X5R_06031μF_X5R_060341μF_X5R_06031μF_X5R_06031μF_X5R_06031μF_X5R_06031μF_X5R_06032.2μF_X5R_06031233V3125656784R4310_1%_0805VDD_ePD1T6FDC606PR4410K_1%_04023SGDPB10ePD1_PWR_ENnePD1_PWR_ENn1μF_X5R_0603DocID0229 Rev 2 STLM75DS2FePD1_BUSYePD1_RESETePD1_D/CePD1_CSePD1_SCKePD1_MOSIVDD_ePD1R3710K_1%_0402C25C35C311234567101112131415161718192021222324C30C29C28C24C23C26C33GDT5STS7P2UH7PA8PB2PB11PA15PB3PB5ePD1_BUSYePD1_RESETePD1_D/CePD1_CSePD1_SCKePD1_MOSIT5NotFitted100nF_X7R_0603NCGDRRESEVGLVGHTSCLTSDABS1BUSYRES#D/C#CS#D0D1VDDIOVCIVSSVDDVPPVSHPREVGHVSLPREVGLVCOMCON_GDE021A1_EPDSTitle:ElectronicPaperDisplayProject:STM32L0538-DISCOSize:A4Reference:MB1143Date:26-May-14Revision:B-01Sheet:4of6Electrical schematics 35/39 38123123LS_P3LS_P2LS_P1PA5LD_RLED,redLD3LED,greenLD4USER&WAKE-UPButtonLD_RR691KLD_GLD_GR60330PA0C55100nF32RESETButton41Figure 17. Linear touch sensor, NFC, USB and pushbuttonTitle:LinearTouchSensor,NFC,USBandPushButtonProject:STM32L0538-DISCOSize:A4Reference:MB1143Date:22-May-14Revision:B-01Sheet:5of6SW-PUSH-CMS_BLACKB2DocID0229 Rev 2 TS_G3_IO3PB1PB4B_USERB_USERR7310KC51100nF32R7210KVDDR74[NA]SB29NRSTNRSTSW-PUSH-CMS_BLUEB1LinearTouchSensormadeof3electrodesSB224136/39 CN1Electrical schematics LinearSensorLS1USBUser5V_USB_USERCN3R21R20R130USB1_DM0USB1_DP100KUSB1_DMUSB1_DPPA11PA12NFC_IRQINnNFC_MISONFC_SCK3V3C1100nF123456femaleconn4X2PB6PB14PB13753182NFC_IRQOUTnNFC_NSSNFC_MOSI24681357PB7PB12PB15R1710KR1810KTS_G3_IO2PB0OperatingVoltage:+3.3VNFCkitreference:CR95HF-BUSB-MINI-typeBPA6VCCD-D+IDGNDSHELLR1910KTS_G2_IO3TS_G1_IO3PA2NFCTS_G1_IO4PA7PA3TS_G2_IO4VDDC1447nFC1347nFC1247nFUM1775 UM1775 R45510MFX_IRQ_OUT3V34847454443424140393837MFX_SWCLKMFX_USART3_RXMFX_USART3_TXMFXMultiFunctioneXpanderMFX_IDD_SH0MFX_IRQ_OUT10KR501K_1%_0402VDDR51100KMFX_I2C_SDAMFX_I2C_SCLMFX_I2C_ADDRR49MFX_VDD_MCUU6STM32L152CCT6NotFitted3V3MFX_USART3_RXMFX_USART3_TXAllthisblockmustbeveryclosetotheSTM32L1523V3MFX_SWDIOR393V3C391uF0R482K2VDDA_L1L2C32100nFR4010KMFX_IDD_SH1MFX_IDD_SH2MFX_IDD_CALR47VDDA_L110K3V3VDD_3VSS_3PB9PB8BOOT0PB7PB6PB5PB4PB3PA15PA14R462K2MFX_I2C_SDAMFX_I2C_SDAMFX_I2C_SCLFerrite3V3C40100nFC361uFC34100nFC38100nFMFX_I2C_SCLC41100nFC42100nF1234567101112VLCDPC13PC14/OSC32_INPC15/OSC32_OUTPH0/OSC_INPH1/OSC_OUTNRSTVSSAVDDAPA0PA1PA2PA3PA4PA5PA6PA7PB0PB1PB2PB10PB11VSS_1VDD_1VDD_2VSS_2PA13PA12PA11PA10PA9PA8PB15PB14PB13PB12363534333231302928272625CN63V3MFX_SWCLKMFX_SWDIOMFX_WAKEUPMFX_IDD_MEAS12341314151617181920212223243V3MFX_USART3_RXMFX_USART3_TX412356785VC46SR67100K_1%_040232100nF4R684K7_1%_040244S1256SSSS4G3GDDGG123D443DS4T11FDC606P1231233MFX_IDD_CALR5610K_1%_0402R5310K_1%_0402R5224_1%_0805R5710K_1%_0805T7T8FDC606PSTS7P2UH7MFX_IDD_SH143U7BC45TSZ124IPT5100nF76DGGDDGT13T14FDC606PSTS7P2UH7MFX_IDD_SH01256567812565678T9T10FDC606PSTS7P2UH7MFX_IDD_SH212R5410K_1%_0402R55620_1%_080512565678R661K_0.1%_0402U7DTSZ124IPT1413R631K_0.1%_0402109R6149K9_0.1%_0402U7CTSZ124IPT8R5810K_1%_0402R591_1%_0805Figure 18. IDD measurement / MFX (Multi Function eXpander)3V311132DocID0229 Rev 2 3V3GT12STS7P2UH7T12,T14NotFitteddifferentialamplifierT8,T10NotFitted5VU7ATSZ124IPT13V3DSR49K9_0.1%_0402C43100nFR62100MFX_IDD_MEASJP4VDDTitle:IDDmeasurement/MFX(MultiFunctioneXpander)Project:STM32L0538-DISCOSize:A4Reference:MB1143Date:26-May-14Revision:B-01Sheet:6of6Electrical schematics 37/39 38Revision historyUM1775 7 Revision history Table 7. Document revision history Date20-June-201424-June-2014 Revision 12 initial release Removed embedded USB bootloader paragraph. Changes 38/39DocID0229 Rev 2 UM1775 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. 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All other names are the property of their respective owners. © 2014 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com DocID0229 Rev 239/39 39
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