AT88RF04C datasheet(21/158 Pages) ATMEL

номер детали	AT88RF04C

подробное описание детали	CryptoRF Specification

PDF	158 Pages

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производитель	ATMEL [ATMEL Corporation]

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AT88SC0808/1616/3216/6416CRF, AT88RF04C

5276C–RFID–3/09

6.2.

Set User Zone Command [$c1]

The Set User Zone command selects the user memory area to be addressed by the Read User Zone and Write User

Zone commands.

Reader

PICC

Command >

CID

PARAM

CRC1

CRC2

Echo Response >

CID

ACK/NACK

STATUS

CRC1

CRC2

6.2.1.

Operation

Before reading and writing data to the user memory, the host must select a User Zone with this command. Only one

User Zone may be selected at a time. At the time the zone is selected the host also chooses whether anti-tearing is

active for the selected zone. If anti-tearing is activated, then all writes to the User Zone will utilize anti-tearing until a

new Set User Zone command is received. Only PICCs in the Active State are permitted to answer this command.

6.2.2.

Command Field Description

CID

The Card ID assigned by the ATTRIB command.

PARAM

Selects the User Zone and sets anti-tearing on or off.

Table 16.

Definition of the PARAM byte of the Set User Zone command

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

User Zone

Table 17.

Coding of the Anti-Tearing Select bit within the PARAM byte

Bit 7

Write User Zone

Normal Write Enabled

Anti-Tearing Write Enabled

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