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AT88SC3216CRF-WA1

CryptoRF® Specification

Atmel Corporation 

5. Anticollision Command Definitions

Commands in this section are arranged in order by the hexadecimal code in the command byte.

5.1. REQB / WUPB Polling Commands [$05]

The REQB / WUPB command is used to search for PICCs in the RF field. The command and response are ISO/IEC

14443-3:2001 compliant.

Reader

PICC

Command >

$05

AFI

PARAM

CRC1

CRC2

ATQB Response >

$50

PUPI 0

PUPI 1

PUPI 2

PUPI 3

APP 0

APP1

APP 2

APP 3

Protocol 1

Protocol 2

Protocol 3

CRC1

CRC2

SUCCESS RESPONSE

System Zone Byte $00

System Zone Byte $01

System Zone Byte $02

System Zone Byte $03

System Zone Byte $04

System Zone Byte $05

System Zone Byte $06

System Zone Byte $07

$00

System Zone Byte $08

$51

5.1.1. Operation

The “Request B” (REQB) and “Wake-Up B” (WUPB) commands are used to probe the RF field for Type B PICCs as the

first step in the anticollision process. The response to an REQB or WUPB command is the “Answer to Request B”

(ATQB). PICCs in the Active State are not permitted to answer this command.

10 AT88SC0808/1616/3216/6416CRF, AT88RF04C

5276C–RFID–3/09

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