AT88SC0808CRF [Summary Datasheet]

Atmel-5027GS-CryptoRF-AT88SC0808CRF-Datasheet-Summary_012014

3

3.

Communications

All personalization and communication with this device is performed through the RF interface. The IC includes an

integrated tuning capacitor, enabling it to operate with only the addition of a single external coil antenna.

The RF communications interface is fully compliant with the electrical signaling and RF power specifications in ISO/IEC

14443-2:2001 for Type B only. Anticollision operation and frame formatting are compliant with ISO/IEC 14443-3:2001 for

Type B only.

ISO/IEC 14443 nomenclature is used in this specification where applicable. The following abbreviations are utilized

throughout this document. Additional terms are defined in the section in which they are used.

Table 3-1.

Terms

3.1

Anticollision Protocol

When the PICC enters the 13.56MHz 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.

3.2

CRC Error Detection

A 2-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 2-byte CRC_B follows the data bytes in the frame.

Figure 3-1. Location of the Two CRC_B Bytes within a Frame

3.3

Type A Tolerance

The RF Interface is designed for use in multi-protocol 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.

Abbrev.

Term

Definition

PCD

Proximity Coupling Device

The reader/writer and antenna.

PICC

Proximity Integrated Circuit Card

The tag/card containing the IC and antenna.

RFU

Reserved for Future Use

Any feature, memory location, or bit that is held as reserved for future use.

$ xx

Hexadecimal Number

Denotes a hex number “xx” (Most Significant Bit on left).

SOF

K data bytes

CRC1

CRC2

EOF