Nfc card reader expansion board based on st25r200 for stm32 nucleos (19 pages)
Summary of Contents for ST X-NUCLEO-NFC05A1 NFC
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ST25R3911B for STM32 Nucleo Introduction The X-NUCLEO-NFC05A1 NFC card reader expansion board is used to evaluate functions based on the ST25R3911B, designed for the expansion of STM32 Nucleo boards. It is compatible with the Arduino™ UNO R3 connector and can be plugged to any STM32 Nucleo board together with other expansion boards to evaluate different devices.
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List of tables UM2252 List of tables Table 1: Interconnections between the X-NUCLEO-NFC05A1 expansion board and the Nucleo-L476RG board (left side) ............................8 Table 2: Interconnections between the X-NUCLEO-NFC05A1 expansion board and the Nucleo-L476RG board (right side) ............................8 Table 3: Matching variant ......................... 15 Table 4: X-NUCLEO-NFC05A1 bill of materials ..................
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UM2252 List of figures List of figures Figure 1: X-NUCLEO-NFC05A1 expansion board ..................2 Figure 2: X-NUCLEO-NFC05A1 component placement ................10 Figure 3: STM32 Nucleo connector schematic diagram ................12 Figure 4: ST25R3911B schematic diagram ....................14 Figure 5: Matching circuit schematic diagram ..................16 Figure 6: PCB layout top layer ........................
To install the board firmware package (order code: X-CUBE-NFC5) the PC must have: 128 MB of RAM 40 MB of free hard disk space The X-CUBE-NFC5 firmware and the related documentation are available at www.st.com. 6/26 DocID030806 Rev 2...
UM2252 Board setup Board setup To set up the board; Connect the X-NUCLEO-NFC05A1 expansion board to the STM32 Nucleo board from the top through the Arduino ® UNO R3 connectors Power the STM32 Nucleo board using a Mini-B USB cable Program the firmware on the STM32 Nucleo board using the provided example Reset the MCU using the reset button available on the STM32 Nucleo board.
Hardware UM2252 Hardware The X-NUCLEO-NFC05A1 expansion board allows the user to test the functionality of the ST25R3911B IC , which supports the reader/writer mode Program the microcontroller on the STM32 Nucleo board. The ST25R3911B IC module and the STM32 Nucleo board are connected through CN5, CN6, CN8 and CN9 connectors (see the tables below).
UM2252 Hardware Signal Connector Pin number Nucleo-L476RG X-NUCLEO-NFC05A1 MISO_MCU MOSI_MCU /SS_MCU MCU_LED6 PB10 MCU_LED4 MCU_LED5 Digital PA10 Host interface and GPIO connection The X-NUCLEO-NFC05A1 expansion board contains the ST25R3911B-AQFT chip and is powered by the STM32 Nucleo board. The ST25R3911B is driven by the microcontroller via SPI interface. The six LEDs indicate the detected technology (for example ISO14443 Type A).
UM2252 Component description Component description ST25R3911B device The ST25R3911B-AQFT is a highly integrated NFC initiator/HF reader IC embedding: the analog front end (AFE) and a highly integrated data framing system for: ISO 18092 (NFCIP-1) initiator ISO 18092 (NFCIP-1) active target ...
UM2252 Component description 4.2.2 ST25R3911B schematic diagram The ST25R3911B is directly connected to the filtered 5 V USB supply. There are additional supply filtering components placed close to the NFC/HF reader IC. Jumper JP200 can be used to measure the chip supply current. If this measurement is performed, the ferrite beat L301 has to be removed.
The matching topology supports the connection of one custom differential antenna or two single-ended antennas. The two single-ended antennas can then be multiplexed in software using the single and rfo2 bits of IO Configuration Register 1. www.st.com/st25r Further information about antenna matching can be found at DocID030806 Rev 2...
UM2252 Component description PCB Layout 4.3.1 PCB layers As the ST25R3911B is a high power RF transmitter, the NFC reader layout must be done carefully. The decoupling capacitors are located as close as possible to the positive and negative power supply pins (for example VSP_RF and VSN_RF). Since the chip is using a differential output driver stage, the antenna matching network is treated as a differential network.
Component description UM2252 4.3.3 Mid layer 1 The mid layer 1 is a pure GND plane. It provides a low ohmic DC path for the GND connection. Figure 7: PCB layout mid layer 1 4.3.4 Mid layer 2 Mid layer 2 is used for power distribution. It contains the power planes for the ST25R3911B 5 V supply and the 3.3 V to communicate with the STM32 Nucleo board.
UM2252 Federal Communications Commission (FCC) and Industry Canada (IC) compliance Federal Communications Commission (FCC) and Industry Canada (IC) compliance FCC Compliance Statement 6.1.1 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.
Federal Communications Commission (FCC) and UM2252 Industry Canada (IC) compliance tout brouillage radioélectrique subi, même si le brouillage est susceptible d’en compromettre le fonctionnement. 6.2.3 IC ID IC ID: 8976A-NFC05A1 24/26 DocID030806 Rev 2...
UM2252 Revision history Revision history Table 5: Document revision history Date Version Changes 06-Jul-2017 Initial release 31-Jul-2017 Added Section 6.1.3: "Part 15.105" DocID030806 Rev 2 25/26...
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