User Manual for STMicroelectronics models including: ST25R300, ST25R300 NFC Card Reader Expansion Board, ST25R300, NFC Card Reader Expansion Board, Reader Expansion Board, Expansion Board, Board
29 апр. 2025 г. — User manual. UM3506 - Rev 1 - April 2025. For further information, contact ... F, and NFC-V poller. •. NFC Forum NFC-A, NFC-F listener. •. 13.56 MHz ...
Apr 29, 2025 · The expansion board is configured to support all five NFC Forum tag types in reader mode. The ST25R300 manages frame coding and decoding in ...
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DocumentDocumentUM3506 User manual Getting started with the NFC card reader expansion board based on ST25R300 for STM32 and STM8 Nucleos Introduction The X-NUCLEO-NFC12A1 NFC card reader expansion board is based on the ST25R300 device. The expansion board is configured to support all five NFC Forum tag types in reader mode. The ST25R300 manages frame coding and decoding in reader mode for standard applications. It supports ISO/IEC 14443 type A and B, ISO/IEC 15693 (single subcarrier only) and ISO/IEC 18092 communication protocols as well as the detection, reading and writing of NFC Forum type 1, 2, 3, 4, and 5 tags. Integrated HF reader/NFC initiator/NFC target IC with an antenna etched on the PCB and the related tuning circuit. Figure 1. X-NUCLEO-NFC12A1 expansion board Notice: For dedicated assistance, please submit a request through our online support portal at www.st.com/support. UM3506 - Rev 1 - April 2025 For further information, contact your local STMicroelectronics sales office. www.st.com UM3506 Getting started 1 Getting started 1.1 Overview The X-NUCLEO-NFC12A1 expansion board features: · On-board NFC card reader and host card emulation IC: ST25R300 · NFC Forum NFC-A, NFC-B, NFC-F, and NFC-V poller · NFC Forum NFC-A, NFC-F listener · 13.56 MHz inductive antenna, 47 x 34 mm, four turns, etched on PCB and associated tuning circuit · Possibility of driving two antennas in a single-ended configuration · Six general-purpose LEDs · Equipped with Arduino® UNO R3 connector · Free comprehensive development firmware library compatible with STM32Cube and samples for ST25R300 · FCC and CE certified · RoHS and WEEE compliant 1.2 Board connection Connect the X-NUCLEO-NFC12A1 to an STM32 Nucleo-64 development board via Arduino® UNO R3 connectors. The PC USB port has to be capable to delivering at least 300 mA at 5 V supply. A green LED indicates whether the 5 V supply is present, while the six status LEDs are controlled via MCU. Provision for unpopulated jumpers enables alternative connections of all lines (except the SPI) to the STM32 MCU. To demonstrate the wake-up feature, two capacitive electrodes are placed on the PCB and the automatic antenna tuning variable capacitors are also implemented. The board is connected to a power supply. It should be used on a clean and nonflammable surface. 1.3 Hardware requirements The X-NUCLEO-NFC12A1 expansion board is designed to be used with any STM32 Nucleo board, although complete testing has been performed using the NUCLEO-L476RG hosting the STM32L476RG microcontroller. The STM32 Nucleo firmware and the related documentation are available at dedicated page. 1.4 System requirements To use STM32 Nucleo boards with the X-NUCLEO-NFC12A1 expansion board the following software and hardware are required: · An STM32 Nucleo-64 development board · A Windows® PC to install the firmware package · A USB type A to Mini-B USB cable to connect the STM32 Nucleo board to the PC · The unit must be supplied by a safety extralow voltage with falling characteristics (<5 V, <15 W), according to EN60950-1. This power supply has to be classified as electrical source 1 (ES1), PS1 according to EN62368-1 To install the board firmware package (order code: X-CUBE-NFC12) the PC must have: · 128 MB of RAM · 40 MB of free hard disk space The X-CUBE-NFC12 firmware and the related documentation are available at ST site. UM3506 - Rev 1 page 2/18 UM3506 Board setup 2 Board setup To set up the board: Step 1. Connect the X-NUCLEO-NFC12A1 expansion board to the STM32 Nucleo board from the top through the Arduino® UNO R3 connectors Step 2. Power the STM32 Nucleo board using a Mini-B USB cable Step 3. Program the firmware on the STM32 Nucleo board using the provided example Step 4. Reset the MCU using the reset button available on the STM32 Nucleo board. The evaluation kit is ready to be used. UM3506 - Rev 1 page 3/18 UM3506 Hardware 3 Hardware The X-NUCLEO-NFC12A1 expansion board allows the user to test the functionality of the ST25R300, which supports the reader/writer and the card emulation modes. The ST25R300 IC module and the STM32 Nucleo board are connected through CN5, CN6, CN8 and CN9 connectors (see the tables below). Table 1. Interconnections between the X-NUCLEO-NFC12A1 expansion board and the NUCLEO-L476RG board (left side) Signal NC IOREF RESET 3V3 5V GND GND VIN A0 A1 A2 A3 A4 A5 Connector CN6 Power CN8 Power Pin number 1 2 3 4 5 6 7 8 1 2 3 4 5 6 NUCLEO-L476RG (NC) 3V3 (VDD_IO) NRST 3V3 (VDD_IO) 5V (VDD) GND GND VIN PA0 PA1 PA4 PB0 PC1 PC0 X-NUCLEO-NFC12A1 (NC) (NC) (NC) 3V3 (VDD_IO) 5V (VDD) GND GND NC IRQ_MCU MCU_LED1 MCU_LED2 MCU_LED3 - Table 2. Interconnections between the X-NUCLEO-NFC12A1 expansion board and the NUCLEO-L476RG board (right side) Signal D15 D14 AVDD GND D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 Connector CN5 Digital CN9 Digital Pin number 10 9 8 7 6 5 4 3 2 1 8 7 6 5 4 3 NUCLEO-L476RG PB8 PB9 AVDD GND PA5 PA6 PA7 PB6 PC7 PA9 PA8 PB10 PB4 PB5 PB3 PA10 X-NUCLEO-NFC12A1 SCL_MCU SDA_MCU NC GND SCLK_MCU MISO_MCU MOSI_MCU /SS_MCU RESET MCU_LED4 MCU_LED5 MCU_LED6 NC NC UM3506 - Rev 1 page 4/18 UM3506 Hardware Signal D1 D0 Connector CN9 Digital Pin number 2 1 NUCLEO-L476RG PA2 PA3 X-NUCLEO-NFC12A1 NC NC 3.1 Host interface and GPIO connection The X-NUCLEO-NFC12A1 expansion board contains the ST25R300-AQET chip and is powered by the STM32 Nucleo board. The ST25R300 is driven by the microcontroller via an SPI interface. The six LEDs indicate the detected RFID technology (for example, ISO14443 Type A for LED4). 3.2 X-NUCLEO-NFC12A1 expansion board component placement Figure 2. X-NUCLEO-NFC12A1 component placement 1. General purpose LEDs 2. ST25R300 3. Matching circuit 4. 47x34 mm four-turn antenna 3.3 ST25R300 device The ST25R300 is a high-performance NFC universal device supporting NFC initiator, NFC target, NFC reader, and NFC card emulation modes. The ST25R300 includes an advanced analog front end (AFE) and a highly integrated data framing system for: · ISO 18092 passive and active initiator, ISO18092 passive and active target · NFC-A/B (ISO 14443A/B) reader including higher bit rates · NFC-F (FelicaTM) reader · NFC-V (ISO 15693) reader up to 53 kbps UM3506 - Rev 1 page 5/18 UM3506 Hardware · NFC-A and NFC-F card emulation Special stream and transparent modes of the AFE and framing system can be used to implement other custom protocols such as MIFARE® classic in reader or card emulation mode. UM3506 - Rev 1 page 6/18 UM3506 - Rev 1 4 Schematic diagrams Arduino Connector +5V 3V3 VBUS CN6 1 2 3 4 5 6 7 8 Header 8X1_Female_samtec Figure 3. X-NUCLEO-NFC12A1 circuit schematic (1 of 3) Extension connectors VBUS C1 2µ2 I2C_SCL ST1 I2C_SDA ST2 SPI_SCLK ST3 SPI_MISO ST4 SPI_MOSI ST5 SPI_BSS ST6 ST7 RESET ST8 Arduino Connector CN5 D15 PB8 D14 PB9 10 9 8 D13 PA5 D12 PA6 D11 PA7 D10 PB6 D9 PC7 D8 PA9 7 6 5 4 3 2 1 Header 10X1_Female LED6 LED5 LED4 LED3 LED2 LED1 R1 R2 R3 R4 PWR Ok 3V3 1K 1K 1K 1K 1K 1K 680R R5 R6 R7 LED7 LED6 LED5 Arduino Connector CN8 1 2 3 4 5 6 PA0 PA1 PA4 PB0 PC1 PC0 A0 A1 A2 A3 A4 A5 Header 6X1_Female ST10 ST12 ST14 ST16 ST18 ST20 SPI_IRQ LED1 LED2 LED3 LED4 LED5 LED6 ST9 ST11 ST13 ST15 Arduino Connector CN9 D7 PA8 D6 PB10 D5 PB4 D4 PB5 D3 PB3 D2 PA10 D1 PA2 D0 PA3 8 7 6 5 4 3 2 1 Header 8X1_Female_samtec LED1 LED2 LED3 SPI_BSS SPI_MOSI SPI_SCLK SPI_IRQ SPI_MISO RESET I2C_SDA I2C_SCL SPI_BSS SPI_MOSI SPI_SCLK SPI_IRQ SPI_MISO RESET I2C_SDA I2C_SCL LED4 UM3506 Schematic diagrams page 7/18 page 8/18 UM3506 - Rev 1 SPI_BSS SPI_MOSI SPI_SCLK SPI_IRQ SPI_MISO RESET I2C_SDA I2C_SCL 3V3 R16 1k Figure 4. X-NUCLEO-NFC12A1 circuit schematic (2 of 3) R8 0R R9 0R R10 0R R11 0R R12 0R R13 18k NC R14 0R NC R15 0R Reset circuit BSS_300 MOSI_300 SCLK_300 IRQ_300 MISO_300 RESET_300 TAD1 TAD2 ST25R300 HF Reader TP1 TP2 NC NC GND GND NC P1 TAD2_300 1 TP3 2 NC TAD1_300 TP6 2 GND P2 1 GND X1 435151014845 VDD VDD VDD_D VDD_A AGD VDD_DR GND 13 19 5 20 23 18 5 GND_1 GND_2 6 2 1 NO_2 NO_1 COM_2 COM_1 4 3 RESET_300 R17 330k C2 100nF 3V3 GND R18 VBUS R23 0R VDD_IO V_RF 0R L1 C3 C4 1µ 10n GND VDD C5 2µ2 GND Crystal circuit XTI XTO Y1 C6 C7 12p 12p GND GND GND GND GND U1 ST25R300 VDD VDD_TX VDD_D VDD_A AGD VDD_DR IRQ_300 MISO_300 BSS_300 MOSI_300 SCLK_300 RESET_300 XTI XTO VDD_IO 1 2 30 31 32 29 26 27 3 IRQ MISO BSS MOSI SCLK RESET XTI XTO VDD_IO ST25 R300 HF Reader IC RFI2 CE_GPIO2 RFO2 RFO1 CE_GPIO1 RFI1 TAD2 TAD1 22 9 16 14 6 21 12 11 RFI2 RFI1 TAD2 TAD1 GND_D NC GND NC GND NC GND NC GND GND_GPIO GND_A VSS (E.P.) VSS GND_DR 4 8 24 17 10 7 25 33 28 15 GND VDD_IO VDD_TX VDD VDD_D VDD_A AGD VDD_DR C8 100nF GND C9 C10 2µ2 10n GND GND C11 C12 2µ2 10n GND GND C13 C14 2µ2 10n GND GND C15 C16 C17 1µ 10n 47n GND GND GND Antenna Connection NC TP4 TP5 NC RFI1 RFI2 RFI2 CE_GPIO2 RFO2 RFO1 CE_GPIO1 RFI1 TAD2 TAD1 VDD_IO VDD_DR AGD VDD_D VDD_A VDD GND TP7 NC TP8 NC TP9 NC TP10 NC TP11 NC TP12 NC TP13 NC TP14 NC TP15 NC TP16 NC UM3506 Schematic diagrams page 9/18 UM3506 - Rev 1 RFI1 CE_GPIO1 RFO1 RFO2 CE_GPIO2 RFI2 CE_GPIO1 L2 120nH 1 2 J1 NC CE_GPIO2 L3 120nH TAD1 TAD2 TAD1 TAD2 CE_GPIO1 CE_GPIO2 NC R21 R22 0R 0R NC CE_GPIO1_AAT CE_GPIO2_AAT Figure 5. X-NUCLEO-NFC12A1 circuit schematic (3 of 3) ANT2 C18 C19 C20 C21 NC NC NC NC GND CE_GPIO1_AAT CE_GPIO2_AAT TAD1 TAD2 Q1 NC Q2 NC Q3 NC Q4 NC C25 150p C27 330p GND C30 330p C34 150p NC C23 68p C26 C22 150p ANT2 C28 130p C24 10p R19 2R2 C29 NC GND 68p C33 NC C35 C31 130p ANT1 C32 NC R20 2R2 C36 10p GND GND GND GND 3 R24 0R 2 1 ANT1 ANT_NFC06 GND C37 150p GND ANT1 CE_GPIO1_AAT CE_GPIO2_AAT TAD1 TAD2 C38 NC Q5 NC C39 NC Q6 NC C40 NC Q7 NC C41 NC Q8 NC GND GND GND GND UM3506 Schematic diagrams UM3506 Bill of materials 5 Bill of materials Item 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 26 27 28 29 Q.ty 5 2 2 5 2 1 2 2 2 2 2 2 2 2 2 2 2 2 1 2 1 1 2 6 1 2 8 7 1 Table 3. X-NUCLEO-NFC12A1 bill of materials Ref. C1, C5, C9, C11, C13 C2, C8 C3, C15 C4, C10, C12, C14, C16 C6, C7 C17 C18, C38 C19, C39 C20, C40 C21, C41 C22, C37 C23, C35 C24, C36 C25, C34 C26, C33 C27, C30 C28, C31 C29, C32 Part/Value 2u2 100n 1u 10n 12p 47n 6p8 12p 27p 68p 150p 100p 10p 150p 68p 330p 130p 6p8 CN5 CN6, CN9 CN8 L1 L2, L3 LED1, LED2, LED3, LED4, LED5, LED6 LED7 P1, P2 Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 R1, R2, R3, R4, R5, R6, R16 1k R7 680R Description Manufacturer Order code 2u2_X5R Murata GRM155R60J225ME01D 100n_X7R 1u_X5R Murata MURATA GCM155R71H104KE02J GRM155R61C105KA12D 10n_x7R AVX 04023C103KAT2A 12p_COG Murata 47n_X7R Murata 6.8p_COG Murata 12p_COG Murata 27p_COG Murata 68p_COG Murata 150p_COG Murata 100p_COG Murata 10p_COG Murata 150p_COG KEMET 68p_COG KEMET 330p_COG YAGEO 130p_COG KEMET 6.8p_COG KEMET Header, 10-Pin, Single Samtec row,female Header, 8-Pin, Single row,female Samtec Header, 6-Pin, Single row,female Samtec muRata LQW18CNR27J 0ZD Murata GCM1555C1H120FA16D GCM155R71E473KA55D GCM1555C1H6R8BA16D GCM1555C1H120FA16D GCM1555C1H270FA16D GRT1555C1H680FA02J GCM1555C1H151FA16D GCM1885C2A101FA16D GCM1555C1H100FA16D C0603C151F5GACTU C0603C680F1GACTU CC0603FRNPO9BN331 C0603C131F5GACTU C0603C689J5GACTU SSQ-110-03-L-S SSQ-108-03-L-S SSQ-106-03-L-S BLM15EG121SH1D LQW18CNR12J0ZD Lite-On LTST-C190TBKT U.FL-R-SMT-1 nCh MOS Fet Lite-On HIROSE(HRS) Diodes Incorporated LTST-C190KGKT U.FL-R-SMT-1(10) BSS123WQ-7-F 1k, 0402 Panasonic ERJ2GEJ102X 680R, 0402 Yageo RC0402JR-07680RL UM3506 - Rev 1 page 10/18 UM3506 Bill of materials Item 30 31 32 33 34 35 36 37 38 Q.ty 8 4 1 1 2 18 1 1 1 Ref. Part/Value R8, R9, R10, R11, R12, R18, 0R R23, R24 R21, R22, R14, R15 0R R13 18k R17 330k R19, R20 2R2 ST1, ST2, ST3, ST4, ST5, ST6, ST7, ST8, ST9, ST10, ST11, ST12, ST13, ST14, ST15, ST16, ST18, ST20 U1 ST25R300AQET QFN32 X1 Y1 Description Manufacturer Order code 0R, 0402 VISHAY CRCW04020000ZSTD 0R, 0402 18k, 0402 330k, 0402 2R2, 0603 VISHAY MULTICOMP VISHAY Vishay Dale CRCW04020000ZSTD MCWR04X1802FTL CRCW0402330KFKED CRCW06032R20FKEA CONN HE14 2PTS MALE VERTICAL NOT FITTED HF Reader IC QFN32 ST Tactile Switches WS-TASV Tact Switch Wurth Elektronik NX2016SA-27.1 2MHZ-EXS00A- NDK CS01188 ST25R300-AQET 435151014845 CS01188-27.12M UM3506 - Rev 1 page 11/18 UM3506 Board versions 6 Board versions Table 4. X-NUCLEO-NFC12A1 versions PCB version Schematic diagrams Bill of materials XN$NFC12A1A (1) XN$NFC12A1A schematic diagrams XN$NFC12A1A bill of materials 1. This code identifies the X-NUCLEO-NFC12A1 expansion board first version. It is printed on the board PCB. UM3506 - Rev 1 page 12/18 UM3506 Regulatory compliance information 7 Regulatory compliance information Notice for US Federal Communication Commission (FCC) Part 15.19 This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Part 15.21 Any changes or modifications to this equipment not expressly approved by STMicroelectronics may cause harmful interference and void the user's authority to operate this equipment. Part 15.105 This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: - Reorient or relocate the receiving antenna. - Increase the separation between the equipment and receiver. - Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. - Consult the dealer or an experienced radio/TV technician for help. Notice for Innovation, Science and Economic Development Canada (ISED) FCC ID: YCPNFC12A1 This device complies with Innovation, Science and Economic Development Canada's license-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation. This device contains license-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canada's license-exempt RSS(s). Operation is subject to the following two conditions: (1) This device may not cause interference. (2) This device must accept any interference, including interference that may cause undesired operation of the device. L'émetteur/récepteur exempt de licence contenu dans le présent appareil est conforme aux CNR d'Innovation, Sciences et Développement économique Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes: 1) L'appareil ne doit pas produire de brouillage; 2) L'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement. Notice for the European Union The X-NUCLEO-NFC12A1 is in conformity with the essential requirements of the Directive 2014/53/EU (RED) and of the Directive 2015/863/EU (RoHS). Applied harmonized standards are listed in the EU Declaration of Conformity. Notice for United Kingdom The X-NUCLEO-NFC12A1 is in compliance with the UK Radio Equipment Regulations 2017 (UK SI 2017 No. 1206 and amendments) and with the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment Regulations 2012 (UK SI 2012 No. 3032 and amendments). Applied standards are listed in the UK Declaration of Conformity. UM3506 - Rev 1 page 13/18 Revision history Date 29-Apr-2025 Table 5. Document revision history Revision 1 Initial release. Changes UM3506 UM3506 - Rev 1 page 14/18 UM3506 Contents Contents 1 Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 1.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2 Board connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.3 Hardware requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.4 System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2 Board setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 3 Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 3.1 Host interface and GPIO connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.2 X-NUCLEO-NFC12A1 expansion board component placement . . . . . . . . . . . . . . . . . . . . . . . . 5 3.3 ST25R300 device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Schematic diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 5 Bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 6 Board versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 7 Regulatory compliance information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 List of tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 List of figures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 UM3506 - Rev 1 page 15/18 UM3506 List of tables List of tables Table 1. Table 2. Table 3. Table 4. Table 5. Interconnections between the X-NUCLEO-NFC12A1 expansion board and the NUCLEO-L476RG board (left side) 4 Interconnections between the X-NUCLEO-NFC12A1 expansion board and the NUCLEO-L476RG board (right side) ................................................................................4 X-NUCLEO-NFC12A1 bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 X-NUCLEO-NFC12A1 versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 UM3506 - Rev 1 page 16/18 UM3506 List of figures List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. X-NUCLEO-NFC12A1 expansion board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 X-NUCLEO-NFC12A1 component placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 X-NUCLEO-NFC12A1 circuit schematic (1 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 X-NUCLEO-NFC12A1 circuit schematic (2 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 X-NUCLEO-NFC12A1 circuit schematic (3 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 UM3506 - Rev 1 page 17/18 UM3506 IMPORTANT NOTICE READ CAREFULLY STMicroelectronics NV and its subsidiaries ("ST") reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST's terms and conditions of sale in place at the time of order acknowledgment. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of purchasers' products. No license, express or implied, to any intellectual property right is granted by ST herein. Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product. ST and the ST logo are trademarks of ST. For additional information about ST trademarks, refer to www.st.com/trademarks. All other product or service names are the property of their respective owners. Information in this document supersedes and replaces information previously supplied in any prior versions of this document. © 2025 STMicroelectronics All rights reserved UM3506 - Rev 1 page 18/18