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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AS3909 датащи(PDF) 13 Page - ams AG |
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AS3909 датащи(HTML) 13 Page - ams AG |
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13 / 77 page  ams Datasheet, Confidential: 2013-Oct [3-02] AS3909/AS3910 – 13 Detaile d Desc rip t ion ISO-14443 and NFCIP Framing This block performs ISO-14443 and NFCIP-1 106 kbps active communication framing for receive and transmit according to the selected ISO mode and data rate settings. • In reception, it takes demodulated subcarrier signal from Receiver. It recognizes the SOF, EOF and data bits; performs parity and CRC check; organizes the received data in bytes and places them in the FIFO. • During transmit, it operates inversely; it takes bytes from FIFO; generates parity and CRC bits; adds SOF and EOF; and performs final encoding before passing modulation signal to transmitter. • In Transparent mode, the framing and FIFO are bypassed; the digitized subcarrier signal, which is Receiver output is directly sent to SDATAO pin; signal applied to SDATAI pin is directly used to modulate the transmitter. FIFO The AS3909/10 contains a 32byte FIFO. Depending on the mode, it contains either data that has been received or data that is to be transmitted. Control Logic The control logic contains I/O registers, which define the operation of device. SPI Interface A 4-wire Serial Peripheral interface (SPI) is used for communication between external microcontroller and the AS3909/10. |
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