AS3910-BQFP AMSCO [austriamicrosystems AG], AS3910-BQFP Datasheet - Page 12

• Manufacturer Part Number: AS3910-BQFP
• Description: 13.56 MHz RFID Reader IC, ISO-14443 A/B
• Manufacturer: AMSCO [austriamicrosystems AG]

AS3910
Data Sheet - D e t a i l e d D e s c r i p t i o n
7.0.9 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.
7.0.10 FIFO
The AS3910 contains a 32byte FIFO. Depending on the mode, it contains either data that has been received or data that is to be transmitted.
7.0.11 Control Logic
The control logic contains I/O registers, which define the operation of device.
7.0.12 SPI Interface
A 4-wire Serial Peripheral interface (SPI) is used for communication between external microcontroller and the AS3910.
www.austriamicrosystems.com/HF_RFID_Reader/AS3910
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.
Revision 2.3
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