AT88SC6416CRF-MR1 查看數據表（PDF） - Atmel Corporation

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AT88SC6416CRF-MR1

CryptoRF® Specification

Atmel Corporation 

AT88SC0808/1616/3216/6416CRF, AT88RF04C

O.3.

Frame Format

Data transmitted by the PCD or PICC is sent as frames. The frame consists of the start of frame (SOF), several bytes

of information, and the end of frame (EOF). The SOF and EOF requirements are shown in Figure 47.

Figure 47. Start of Frame (SOF) and End of Frame (EOF) format requirements.

Starte of Frame

No Modulation

10 to 11 ETUs of “0”s

Total Start of Frame Length is 12 to 14 ETUs

2 to 3 ETUs “1”s Start b0

b1

First Byte

End of Frame

Last Byte

10 to 11 ETUs of “0”s

Total Start of Frame Length is 10 to 11 ETUs

O.4.

Reader Data Transmission

The unmodulated 13.56 MHz carrier signal amplitude which is transmitted when the reader is idle is defined as logical

“1”, while the modulated signal level is defined as logical “0”. A frame transmitted by the reader consists of SOF,

several bytes of data, a 2 byte CRC_B, and the EOF.

Figure 48. Format of a frame transmitted by the reader to the card.

No Modulation ("1"s)

Command, Data and CRC_B

No Modulation ("1"s)

SOF

Data Transmission

EOF

5276C–RFID–3/09

137

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