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NFC 近场
通信技术受到银行和运营商的力挺,例如:为普及NFC终端,某国内最大的
手机运营商提出每卖一台NFC手机,会多给 30 元人民币的补贴。另一方面,拥有 375Mbps传输数据率的 TransferJet 近场通信技术也在逐渐成为大数据高速传输技术的新宠。为应对这两大市场趋势,世平集团特推出 NFC 和 TransferJet 近场通信技术方案。
一、 NFC 近场通信技术方案
二、 TransferJet 近场通信技术方案
一、NFC近场通信技术方案
NFC(Near Field Communica
tion)是一种采用 13.56MHz 频带的近距离无线通信技术。结合了感应式读卡器、感应式卡片和点对点功能。虽然通信距离仅为 10cm 左右,不过和非接触式 IC 卡技术一样,“只需碰一下”,便可在不同的
电子产品间交换数据。
与非接触式 IC 卡不同之处在于 NFC 可进行双向通信。只要是支持 NFC 的产品和 IC 卡,就可以读出或写入数据。还可在手机等便携产品间进行通信。数据传输速度不高,有 106Kbit/秒、212Kbit/秒、424Kbit/秒以及 848Kbit/秒四种速度可供选择。
NFC 三种工作模式
1. NXP 方案框图
2. NFC 芯片特点
2.1 NXP PN544/PN65O PN547/NPC100/PN65T
- Card Emulation
- ISO/IEC 14443 (A&B), MIFARE and Type B’ card emulation support via SWP up to 424kbit/s
- ISO/IEC 14443A, MIFARE over NFC-WI
- Reader/Writer mode
- ISO/IEC 14443 Type A & B R/W up to 848 kbit/s
- ISO/IEC 15693
- FeliCa R/W support up to 424kbit/s
- Support of all mandatory NFC Forum tags types
- R/W support for MIFARE 1K, 4K
- Peer to Peer mode
- Features
- 80C51(PN544PC), Cortex M0 core (NPC100)
- Automated Rx gain control / Diff Rx path
- Integrated power management unit
- Hard power down mode
- Direct connection to mobile battery 2.3 to 5.5V
- Powered-by-the-field in card emulation
- Secure element supply (SIM, SmartMX)
- Integrated FracNpll to save Xtal quartz
- Integrated self test to test antenna matching circuit during production
- Package
- PN544PC TFBG (4.5x4.5x0.8mm)
- NPC100 VFBGA64 (4.0x4.3x0.9mm), WLCSP
- Interfaces
- Host baseband:SPI,I2C,Serial UART
- Secure element:SWP,NFC-WI
2.2 TI TRF7970A
- Supports Near Field Communication (NFC) Standards NFCIP-1 (ISO/IEC 18092) and NFCIP-2 (ISO/IEC 21481)
- Completely Integrated Protocol Handling for ISO15693,ISO18000-3,ISO14443A/B and FeliCa
- Integrated Encoders,Decoders and Data Framing for NFC Initiator,Active and Passive Target Operation for All Three Bit Rates (106 kbps,212 kbps,424 kbps) and Card Emulation
- RF Field Detector with Programmable Wake-Up Levels for NFC Passive Transponder Emulation Operation
- RF Field Detector for NFC Physical Collision Avoidance
- Integrated State Machine for ISO14443A Anti-collision (Broken Bytes) Operation (Transponder Emulation or NFC Passive Target)
- Input Voltage Range: 2.7 VDC to 5.5 VDC
- Programmable Output Power: +20 dBm (100 mW), +23 dBm (200 mW)
- Programmable I/O Voltage Levels From 1.8 VDC to 5.5 VDC
- Programmable System Clock Frequency Output (RF,RF/2,RF/4) from 13.56 MHz or 27.12 MHz Crystal or Oscillator
- Integrated Voltage Regulator Output for Other System Components (MCU,Peripherals,Indicators),20 mA (Max)
- Programmable Modulation Depth
- Dual Receiver Architecture with RSSI for Elimination of "Read Holes" and Adjacent Reader System or Ambient In-Band Noise Detection
- Programmable Power Modes for Ultra Low-Power System Design (Power Down <1 µA)
- Parallel or SPI Interface (With 127 Byte FIFO)
- Temperature Range: –40°C to 110°C
- 32 Pin QFN Package (5 mm x 5 mm)
3. NFC 方案照片
二、TransferJet 近场通信技术方案
这是一种类似 NFC 的近场无线技术,可以让两个数码产品在 3cm 的距离内进行数据高速传输——375Mbps,最大值甚至高达 560Mbps,建立连接的时间只有 0.1 秒,且低功耗。如果有两个这样的接触头,那么一碰之间就可以连接通。和 NFC 不同在于 TransferJet 一开始就采用的是 4.48GHz 的高频载波,是为高速、大文件和大数据量传输的应用场合而设计的。
1. 方案框图
2. 方案特点
- TransferJet Specification compliant
- Output frequency 4.48GHz
- Transmit Output:up to-42.5dBm
- Transfer speed:522Mbps(max.)
- External reference clock:20MHz/40MHz(Xtal)
- Host Interface:SDIO Device I/F(High Speed UHS-I supports)
- SPI for Memory Interface:EEPROM
- Power Supply Management Unit(PMU)
- 10KHz CR oscillator
- Low power consumption operation
- Low power mode support
- Power Supply Voltage
- Single Power Supply operation:1.8V
- Double Power Supply operation:1.8V/3.3V
3. 方案照片
- Spreadtrum 手机实现 TransferJet 功能
- Rockchip 平板实现 TransferJet 功能
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