AT88SC6416CRF-MR1 View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT88SC6416CRF-MR1

CryptoRF® Specification

Atmel Corporation 

AT88SC0808/1616/3216/6416CRF, AT88RF04C

Appendix M. Personalization of the Anticollision Registers

There are several registers that define the polling response of CryptoRF, which are written during the personalization

process. The ISO/IEC 14443 Part 3 requirements must be considered when programming these registers. Incorrect

personalization of these registers may cause readers to reject cards or to become confused and unable to complete

the transaction. This appendix describes the requirements for programming the polling registers for operation with

ISO/IEC 14443 compliant readers and systems.

M.1.

Anticollision Procedure

The RF reader (PCD) searches for Type B cards by issuing REQB or WUPB polling commands. These commands

contain an AFI (Application Family Identifier) code to poll for only cards with a matching AFI code. Applications

supporting multiple cards may also poll using the Slot MARKER command. See Appendix N for a detailed description

of the anticollision procedures.

The answer to any of these polling commands is called the ATQB response. This response contains a card serial

number (PUPI), which is used to identify a specific card during the anticollision process, along with three protocol

bytes. The protocol bytes tell the PCD what communication capabilities and options the card supports, and are used by

the reader to configure itself for optimum communications with the card.

M.2.

Anticollision Registers

The ATQB response of CryptoRF contains several values that are located in registers in the anticollision section of the

System Zone (see Figure 42 and Figure 43). The values stored in the following registers are used during anticollision:

PUPI, APP, RBmax, AFI.

Figure 42. Memory Map of Anticollision Registers in the System Zone of 88SC PICCs.

$0

$1

$2

$3

$4

$5

$6

$7

$00

PUPI

APP

$08 RBmax AFI

MTZ

CMC

Anticollision

Figure 43. Memory Map of Anticollision Registers in the System Zone of 88RF PICCs.

$0

$1

$2

$3

$4

$5

$6

$7

$00

PUPI

APP

$08 RBmax AFI

MTZ

CMC

HWR

Anticollision

The REQB/WUPB polling command and response are shown in Figure 44 with color-coding which matches Figure 42

and Figure 43. Nine bytes of the ATQB response are customer programmable on CryptoRF. In addition, the AFI code

used for selection of cards for a particular application during anticollision is also customer configured.

5276C–RFID–3/09

129

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