AT88RF04C-MY1G 查看數據表（PDF） - Atmel Corporation

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AT88RF04C-MY1G

CryptoRF® Specification

Atmel Corporation 

AT88SC0808/1616/3216/6416CRF, AT88RF04C

6.7. Write User Zone (Large Memory) Command [$c3]

The Write User Zone command writes data into the currently selected User Zone. This command format applies to the

AT88SC6416CRF device only.

Reader

PICC

Command >

PARAM = ADDR H

CID

$3

ADDR H

ADDR L

“L”

DATA 1

DATA 2

……….

DATA “L”

DATA “L+1”

CRC1

CRC2

Echo Command >

CID

$3

ACK/NACK

STATUS

CRC1

CRC2

6.7.1. Operation

The Write User Zone (Large Memory) command operates identically to the normal Write User Zone command, but

utilizes a two byte address to support large memory sizes. The Write User Zone command writes data in the device's

currently selected User Zone. As each byte is clocked in to the memory the lower bits of the address are internally

incremented. The upper address bits are not incremented, so the page address remains constant.

Write operations cannot cross page boundaries; a Write User Zone command can only write data bytes within a single

physical memory page. Attempts to write beyond the end of the page boundary will wrap to the beginning of the same

page. Only PICCs in the Active State are permitted to answer this command.

If Encryption Communication Security is active the DATA bytes are encrypted; no other bytes are encrypted. In the

Normal and Authentication Communication Security modes none of the bytes are encrypted.

33

5276C–RFID–3/09

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