AT88RF04C-MX1G Atmel, AT88RF04C-MX1G Datasheet - Page 3

• Manufacturer Part Number: AT88RF04C-MX1G
• Description: IC EEPROM 4KBIT 13MHZ TAG
• Manufacturer: Atmel
• Series: CryptoMemory®, CryptoRF®r

Specifications of AT88RF04C-MX1G

• Rf Type: Read / Write
• Frequency: 13.56MHz
• Features: ISO1444-2, 1444-3, 4-kbits
• Package / Case: RFID Tag, 13mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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8672AS–CRRF–04/09
Anticollision Protocol
When the PICC enters the 13.56 MHz RF field of the host reader (PCD), it performs a power on reset (POR) function
and waits silently for a valid Type B polling command. The CryptoRF PICC processes the anti-tearing registers as part
of the POR process.
The PCD initiates the anticollision process by issuing an REQB or WUPB command. The WUPB command activates
any card (PICC) in the field with a matching AFI code.
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.
CRC Error Detection
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.
Type A Tolerance
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.
User Memory
The EEPROM user memory is divided into four user zones as shown in the memory map in Table 1. Multiple zones
allow for different types of data or files to be stored in different zones. Access to the user zones is allowed only after
security requirements have been met. These security requirements are defined by the user in the configuration memory
during personalization of the device. The EEPROM memory page length is 16 bytes.
Table 1.
User 0
User 1
User 2
User 3
Zone
SOF
Location of the Two CRC_B Bytes within a Frame
Memory Map
$00
$78
$00
$78
$00
$78
$00
$78
―
―
―
―
―
―
―
―
K data bytes
$0
$1
$2
$3
128 Bytes
128 Bytes
128 Bytes
128 Bytes
CRC1
$4
$5
CRC2
AT88RF04C
$6
EOF
$7
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