ST25R3916B

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产品概述

描述

The ST25R3916B and ST25R3917B are high performance NFC universal devices supporting NFC initiator, NFC target, NFC reader and NFC card emulation modes when applicable.

Being fully compliant with EMVCo 3.1a analog and digital, this NFC IC is optimized for POS terminal applications, and enables fast EMVCo certification cycles, even under harsh conditions, with antenna around noisy LCD displays.

The ST25R3916B device includes an advanced analog front end (AFE) and a highly integrated data framing system for ISO 18092 passive and active initiator, ISO 18092 passive and active 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. The ST25R3917B provides a reduced feature set compared to the ST25R3916B.

Special stream and transparent modes of the AFE and framing system is used to implement other custom protocols in reader or card emulation mode.

The ST25R3916B and ST25R3917B feature high RF output power to directly drive antennas at high efficiency.

The ST25R3916B and ST25R3917B include additional features, making them incomparable for low power applications. The presence of a card is detected by performing a measurement of the amplitude or phase of the antenna signal. They also contain a low power RC oscillator and wake-up timer to automatically wake-up the ST25R3916B and ST25R3917B after a selected time period and check for a presence of a tag using one or more techniques of low power detection of card presence (phase or amplitude).

The ST25R3916B and ST25R3917B are designed to operate from a wide power supply range (2.6 to 5.5 V from -40 °C to +105 °C, 2.4 to 5.5 V from -20 °C to +105 °C), and a wide peripheral IO voltage range (from 1.65 to 5.5 V).

Due to this combination of high RF output power, low power modes and wide supply range these devices are perfectly suited for infrastructure NFC applications.

所有功能
Operating modes

Reader/writer

Card emulation

Active and passive peer to peer

RF communication

EMVCo^® 3.1a analog and digital compliant

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 kb/s

NFC-A / ISO14443A (106 kbit/s) and NFC-F / FeliCa™ (212/424 kbit/s) card emulation

Active and passive peer to peer initiator and target modes, up to 424 kbit/s

Low level modes to implement MIFARE Classic^® compliant or other custom protocols

主要特性

Dynamic power output (DPO) controls the field strength to stay within given limits

Active wave shaping (AWS) reduces over-and under-shoots

Noise suppression receiver (NSR) allows reception in noisy environment

Automatic antenna tuning (AAT) via variable capacitor

Integrated EMVCo^® 3.1a compliant EMD handling

Automatic gain control and squelch feature to maximize SNR

Low power NFC active and passive target modes

Adjustable ASK modulation depth, from 0 to 82%

Integrated regulators to boost system PSRR

AM/PM and I/Q demodulator with baseband channel summation or automatic channel selection

Possibility to drive two independent single ended antennas

Measurement of antenna voltage amplitude and phase, RSSI, on-chip supply and regulated voltages

External communication interfaces

512-byte FIFO

Serial peripheral interface (SPI) up to 10 Mbit/s

I2C with up to 400 kbit/s in Fast-mode, 1 Mbit/s in Fast-mode Plus, and 3.4 Mbit/s in High-speed mode

Electrical characteristics

Wide supply voltage and ambient temperature range (2.6 to 5.5 V from -40 °C to +105 °C, 2.4 to 5.5 V from -20 °C to +105 °C)

Wide peripheral communication supply range, from 1.65 to 5.5 V

Quartz oscillator capable of operating with 27.12 MHz crystal with fast start-up
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