ST25R3917 High performance NFC universal device and EMVCo reader

Description

The ST25R3916/7 is a high-performance NFC general-purpose device that supports NFC initiator, NFC target, NFC reader and NFC card emulation modes (if applicable).
Being fully compliant with EMVCo 3.0 analog and digital standards, this NFC IC is optimized for POS terminal applications and achieves the fastest EMVCo 3.0 certification cycle, even under harsh conditions and around noisy LCD displays for antennas.
Both devices include an advanced analog front end (AFE) and a highly integrated data framing system for ISO 18092 passive and active initiators, ISO 18092 passive and active targets, NFC-A/B (ISO 14443A/B) readers including higher bit rates, NFC-F (FeliCa™) readers, NFC-V ( ISO 15693) readers with speeds up to 53 kbps, and NFC-A / NFC-F card emulation.
Special streams and transparent modes of the AFE and framing system can be used to implement other custom protocols in reader or card emulation mode.
The ST25R3916/7 has high RF output power to drive the antenna directly and efficiently.
The ST25R3916/7 include additional features that make them unmatched for low power applications. They include a low-power capacitive sensor that can detect the presence of a card without opening the reader field. In addition, the presence of the card can still be detected by measuring the amplitude or phase of the antenna signal. They also contain a low-power RC oscillator and wake-up timer that automatically wakes up the ST25R3916/7 after a selected period of time and checks for the presence of a tag using one or more low-power techniques for detecting card presence (capacitance, phase, or amplitude).
The ST25R3916/7 is designed to operate over a wide power supply range (from 2.4 to 5.5V) and a wide peripheral IO voltage range (from 1.65 to 5.5V).
Due to this combination of high RF output power, low power modes and wide power supply range, these devices are perfectly suited for infrastructure NFC applications.

Features

- Operating Modes
-Reader/writer
-Card emulation
-Active and passive point-to-point
- RF communication
-Compliant with EMVCo™ 3.0 analog and digital standards
-NFC-A / ISO14443A up to 848 kbit/s
-NFC-B / ISO14443B, up to 848 kbit/s
-NFC-F / FeliCa™ up to 424 kbit/s
-NFC-V / ISO15693 up to 53 kbit/s
-NFC-A / ISO14443A and NFC-F / FeliCa™ card emulation
-Active and passive point-to-point initiator and target modes up to 424 kbit/s
-Low-level mode for MIFARE Classic® compatibility or other custom protocols
- Key Features
-Dynamic Power Output (DPO) controls field strength to stay within given limits
-Active Wave Shaping (AWS) to reduce overshoot and undershoot
-Noise Suppression Receiver (NSR) allows reception in noisy environments
-Automatic Antenna Tuning (AAT) via variable capacitance
-Integrated EMD processing in compliance with EMVCo 3.0 standard
-Automatic gain control and squelch function to maximize signal-to-noise ratio
-Low-power capacitive and inductive card detection
-Low power NFC active and passive target modes
-Adjustable ASK modulation depth from 5% to 40%
-Integrated voltage regulator to improve system PSRR
-AM/PM and I/Q demodulator with baseband channel summation or automatic channel selection
-Can drive two independent single-ended antennas
Measures amplitude and phase of antenna voltage, RSSI, on-chip power supply and regulation voltage
- External communication interface
512-byte FIFO
-Serial peripheral interface (SPI) with speeds up to 10 Mbit/s
-I2C with up to 400 kbit/s in fast mode, up to 1 Mbit/s in fast mode and up to 3.4 Mbit/s in high speed mode
- Electrical characteristics
-Wide range of supply voltages from 2.4 to 5.5 V
-Wide range of peripheral communication power supplies from 1.65 to 5.5 V
-Quartz oscillator capable of 27.12 MHz crystal operation and fast start-up