NFC 모듈 -ST25R3916
(NFC 4 CLICK)
개요
- 본 제품은 NFC 모듈 -ST25R3916 입니다.
- 다기능 NFC 트랜시버 ST25R3916 칩을 기반으로 디자인된 제품으로 passive peer-to-peer, NFC card-emulation mode, NFC reader 동작을 지원합니다.
- 높은 RF 출력을 지원하여 PCB의 안테나를 직접적으로 동작시킬 수 있습니다.
- ISO 14443A/B, ISO 15693, ISO 18092, Felica, NFC Forum standards 를 지원하는 EMVCo 리더 역활을 할 수 있습니다.
특징
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HOW DOES IT WORK?
NFC 4 Click as its foundation uses the ST25R3916, a high-performance multi-purpose NFC transceiver supporting NFC initiator, NFC target, reader, and card emulation modes from STMicroelectronics. It features high RF output power to directly drive an antenna etched on the PCB, alongside its tuning circuit, at high efficiency. Besides being fully compliant with EMVCo 3.0, it also includes an advanced analog front end and a highly integrated data framing system for ISO 18092 passive and active initiator and target, NFC-A/B (ISO 14443A/B) reader including higher bit rates, NFC-F (FeliCa™) reader, NFC-V (ISO 15693) reader up to 53 kbps, and NFC-A / NFC-F card emulation. Due to this combination of high RF output power and low power modes, this Click board™ is ideally suited for infrastructure NFC applications.
The ST25R3916 features a built-in A/D converter, which input can be multiplexed from different sources used for the diagnostic functions and the low power card detection. The result of the A/D conversion is stored in a register that can be read through the selectable host interface. It also contains a low-power capacitive sensor to detect the presence of a card without switching on the reader field by measuring the amplitude or phase of the antenna signal. Also, an integrated low power RC oscillator and a wake-up timer automatically wake up the ST25R3916 and check for a presence of a tag using one or more techniques of low power detection of card presence (capacitive, phase, or amplitude).
NFC 4 Click communicates with a microcontroller either via an SPI interface or via an I2C interface. The ST25R3916 acts as a slave device on both interfaces, relying on the microcontroller to initiate all communication. The communication selection can be made by positioning SMD jumpers labeled as COMM SEL to an appropriate position. Note that all the jumpers' positions must be on the same side, or the Click board™ may become unresponsive. This Click board™ also features an additional interrupt signal routed on the INT pin of the mikroBUS™ socket to notify the microcontroller of completed commands or external events (e.g., peer device field on).
This Click board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before use with MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used, as a reference, for further development.
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Type RFID/NFC Applications Can be used for rapidly integrating NFC technology in any custom application On-board modules ST25R3916 - high-performance multi-purpose NFC transceiver supporting NFC initiator, NFC target, reader, and card emulation modes from STMicroelectronics Key Features Low power NFC active and passive target modes, low power capacitive and inductive card detection, fully compliant with EMVCo 3.0, noise suppression, selectable communication interfaces, and more Interface I2C,SPI Compatibility mikroBUS Click board size L (57.15 x 25.4 mm) Input Voltage 3.3V