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2 / 74 page Contents STRFNFCA 2/74 Doc ID 023077 Rev 10 Contents 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.2 List of terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Pin and signal descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 Power management and operating modes . . . . . . . . . . . . . . . . . . . . . . . 8 3.1 Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.2 Startup sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4 Communication protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4.1 Universal asynchronous receiver/transmitter (UART) . . . . . . . . . . . . . . . 11 4.2 Serial peripheral interface (SPI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4.2.1 Polling mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4.2.2 Interrupt mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 5 Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 5.1 Command format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 5.2 List of commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 5.3 IDN command (0x01) description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 5.4 Protocol Select command (0x02) description . . . . . . . . . . . . . . . . . . . . . . 17 5.5 Pollfield command (0x03) description . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 5.6 Send Receive (SendRecv) command (0x04) description . . . . . . . . . . . . . 23 5.7 Listen command (0x05) description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 5.8 Send command (0x06) description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 5.9 Idle command (0x07) description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 5.9.1 Idle command parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 5.9.2 Using LFO frequency setting to reduce power consumption . . . . . . . . . 34 5.9.3 Optimizing wake-up conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 5.9.4 Using various techniques to return to Ready state . . . . . . . . . . . . . . . . 35 5.9.5 Tag detection calibration procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 5.10 Read Register (RdReg) command (0x08) description . . . . . . . . . . . . . . . 38 5.11 Write Register (WrReg) command (0x09) description . . . . . . . . . . . . . . . 38 5.11.1 Improving RF performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 5.11.2 Improving frame reception for ISO/IEC 14443 Type A tags . . . . . . . . . . 40 |
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