UM1793 STMICROELECTRONICS | Alldatasheet
Document overview
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- PDF pages: 9
Technical content
- an I 2C interface
- a 13.56 MHz RFID reader or a NFC phone. The I2C interface uses a two-wire serial interface, consisting of a bidirectional data line and a clock line. It behaves as a slave with respect to the I2C protocol. The RF protocol is compatible with ISO/IEC 14443 Type A and NFC Forum Type 4 Tag. The board is powered through the Arduino UNO R3 connectors. It also includes three LEDs for general purpose. The X-NUCLEO-NFC01A1 (MB1163) schematics, BOM, gerber files, drivers and firmware are available for download on www.st.com.
Figure 1. Dynamic NFC tag expansion board based on M24SR for STM32 Nucleo
1 Description
The X-NUCLEO-NFC01A1 board contains the M24SR64-Y chip. It is a dynamic NFC/RFID tag IC. It features a 64 Kbit EEPROM memory, preformatted for NFC transactions, and which can be protected by a unique and flexible 128-bit password scheme. The memory bank can be accessed by any of its two interfaces, either from an I2C interface or by a 13.56 MHz passive NFC interface. The I2C interface is a two-wire serial interface, consisting of a bidirectional data line and a clock line. It behaves as a slave with respect to the I2C protocol. The NFC interface is based on the ISO/IEC 14443 type A and NFC Forum type 4 tag specifications. Because it is a passive RF interface, it operates when the board is powered on but also when the board is powered off. Two control pins are also available from the M24SR64-Y chip, allowing flexible management of the NFC interface.
2 Features
Ready-to-use printed circuit board (PCB) including:
- M24SR64-Y dynamic NFC/RFID tag
- 31 mm x 30 mm 13.56 MHz double layer inductive antenna etched on the PCB (ANT14)
- Different color LEDs
- Arduino UNO R3 connectors for Nucleo Board.
3 Hardware and layout description
GPIOs can be used for global purpose. Figure 2. Functional block diagram
3.1 X-NUCLEO-NFC01A1 assembly drawing. Figure 3. Top assembly view
3.2 X-NUCLEO-NFC01 A1 board powering and startup
- Plug the X-NUCLEO-NFC01A1 on a Nucleo STM32 board
- Connect the Nucleo board to a PC via the Type A / mini B USB cable
- Download firmware in STM32 microcontroller
- The demonstration kit is ready to be used
Figure 4. Electrical schematics
UM1793 An overview of FCC regulations
5 An overview of FCC regulations
5.1 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's by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and the 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. 5.2 Part 15.21 Any changes or modifications to this equipment not expressly approved by STMicroelectronics may cause, harmful interference and void the FCC authorization to operate this equipment.
6 Revision history
Table 1. Document revision history 19-Jun-2014 1 Initial release. based on M24SR for STM32 Nucleo. Updated Figure 3: Top assembly view. Updated Figure 4: Electrical schematics. Added Section 5: An overview of FCC regulations.