AT88RF04C-MY1G View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT88RF04C-MY1G

CryptoRF® Specification

Atmel Corporation 

5.4. HLTB Command [$50]

The HLTB command places a PICC in the Halt State, where it is not allowed to answer an REQB command. The

command and response are ISO/IEC 14443-3 compliant.

Reader

PICC

Command >

PUPI of PCI >

$50

PUPI 0

PUPI 1

PUPI 2

PUPI 3

CRC1

CRC2

HLTB Response >

$00

CRC1

CRC2

SUCCESS RESPONSE

5.4.1. Operation

Sending the “Halt B” (HLTB) command (with a matching PUPI) after an ATQB response places the PICC in the Halt

State. A PICC in the Halt State will only respond to a WUPB command. PICCs in the Active State or already in the Halt

State are not permitted to answer this command.

5.4.2. Command Field Descriptions

PUPI:

PseudoUnique PICC Identifier. This is the card ID used for anticollision, stored in the System Zone.

CRC:

Communication error detection bytes.

5.4.3. Response Field Description

CRC:

Communication error detection bytes.

5.4.4. Error Handling

If a HLTB command containing errors is received by the PICC, it is ignored and no response is sent.

5.4.5. Notes

The HLTB command is identical for 88SC and 88RF CryptoRF PICCs.

18 AT88SC0808/1616/3216/6416CRF, AT88RF04C

5276C–RFID–3/09

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