AT88SC0404CRF-WA1 ATMEL [ATMEL Corporation], AT88SC0404CRF-WA1 Datasheet - Page 3

• Manufacturer Part Number: AT88SC0404CRF-WA1
• Description: 13.56 MHz CryptoRF EEPROM Memory 4 Kbits
• Manufacturer: ATMEL [ATMEL Corporation]

CRC Error Detection
Type A Tolerance
5023CS–CRRF–12/06
The REQB command performs the same function but does not affect a PICC in the Halt
state. The CryptoRF command set is available only after the anticollision process has
been completed.
A two-byte CRC_B is required in each frame transmitted by the PICC or PCD to permit
transmission error detection. The CRC_B is calculated on all of the command and data
bytes in the frame. The SOF, EOF, start bits, stop bits, and EGT are not included in the
CRC_B calculation. The two-byte CRC_B follows the data bytes in the frame.
Figure 2. Location of the Two CRC_B Bytes within a Frame
The RF Interface is designed for use in multiprotocol applications. It will not latch or lock
up if exposed to Type A signals and will not respond to them. The PICC may reset in the
presence of Type A field modulation but is not damaged by exposure to Type A signals.
SOF
K data bytes
CRC1
CRC2
EOF
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