参数资料
型号: TRF7970AEVM
厂商: Texas Instruments
文件页数: 47/85页
文件大小: 0K
描述: EVAL MODULE FOR TRF7970A
标准包装: 1
类型: 近距离无线通信
频率: 13.56MHz
适用于相关产品: TRF7970A
已供物品: 板,应答器
其它名称: 296-29475
TRF7970A
www.ti.com
SLOS743K – AUGUST 2011 – REVISED APRIL 2014
Figure 6-32. RX Sequence on I/O_6 in DM0 (Analog Capture)
Step 7: Terminating Direct Mode 0
After the EOF is received, data transmission is over, and Direct Mode 0 can be terminated by sending a
Stop Condition (in the case of SPI, make the Slave Select go high). The TRF7970A is returned to default
state.
6.11 Special Direct Mode for Improved MIFARE? Compatibility
See the application report TRF7970A Firmware Design Hints ( SLOA159 ).
6.12 NFC Modes
6.12.1 Target
When used as the NFC target, the chip is typically in a power down or standby mode. If EN2 = H, the chip
keeps the supply system on. If EN2 = L and EN = L the chip is in complete power down. To operate as
NFC target or Tag emulator, the MCU must load a value different from zero (0) in Target Detection Level
register (b0-b2) which enables the RF measurement system (supplied by VEXT, so it can operate also
during complete power down and consumes only 3.5 μA). The RF measurement constantly monitors the
RF signal on the antenna input. When the RF level on the antenna input exceeds the level defined in the
in Target Detection Level register, the chip is automatically activated (EN is internal forced high). The
typical RF value that causes power-up for each value of B0 to B2 and the function of Target Detection
Level register is listed in Table 6-15 .
NFC Target Detection Level Register (0x18) – defines level for RF level for wake-up and gives
information of NFCID size. This register is directly supplied by VEXT to ensure data retention during
complete power down.
Copyright ? 2011–2014, Texas Instruments Incorporated
Submit Documentation Feedback
Product Folder Links: TRF7970A
Detailed Description
47
相关PDF资料
PDF描述
TRM-418-LT TRANSCEIVER RF 418MHZ LT SERIES
TRM-900-NT RF TXRX 915MHZ NT SERIES
TRX08GVP2540 TXRX OPT SCFF 8.5GB/S 850NM
TS-320240BRNO TCH PANEL 140X104 RESISTIVE MONO
TS-TFT3.5Z TOUCH PANEL 140X1.4.0 TFT
相关代理商/技术参数
参数描述
TRF7970ARHBR 功能描述:IC RFID/NFC AFE 13.56MHZ 32QFN RoHS:是 类别:RF/IF 和 RFID >> RFID IC 系列:- 其它有关文件:CR14 View All Specifications 标准包装:1 系列:- RF 型:收发器 频率:13.56MHz 特点:ISO14443-B 封装/外壳:16-SOIC(0.154",3.90mm 宽) 供应商设备封装:16-SO 包装:Digi-Reel® 其它名称:497-5719-6
TRF7970ARHBT 功能描述:IC RFID/NFC AFE 13.56MHZ 32QFN RoHS:是 类别:RF/IF 和 RFID >> RFID IC 系列:- 其它有关文件:CR14 View All Specifications 标准包装:1 系列:- RF 型:收发器 频率:13.56MHz 特点:ISO14443-B 封装/外壳:16-SOIC(0.154",3.90mm 宽) 供应商设备封装:16-SO 包装:Digi-Reel® 其它名称:497-5719-6
TRF7970ATB 功能描述:RFID应答器 TRF7970A Target Brd RoHS:否 制造商:Murata 存储容量:512 bit 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体: 封装:Reel
TRF79A6AA17LB000 制造商:Opnext 功能描述:XFP FORM FACTOR - Boxed Product (Development Kits)
TRF79A6AA18LB000 制造商:Opnext 功能描述:XFP FORM FACTOR - Boxed Product (Development Kits)