AT88RF04C-MY1G View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT88RF04C-MY1G

CryptoRF® Specification

Atmel Corporation 

AT88SC0808/1616/3216/6416CRF, AT88RF04C

6.12.2. Command Field Description

CID:

The Card ID assigned by the ATTRIB command.

PARAM: The PARAM byte selects the type of read operation to be performed.

Table 42. PARAM byte options for the Read System Zone command.

Command

PARAM

ADDR

Read System Zone

$00

Address

Read Fuse Byte

$01

$FF

Read Checksum

$02

$FF

All Other Values Are Not Supported

“L”

# of bytes – 1

$00

$01

ADDR:

The starting address of the data to read.

L:

The number of bytes to read minus 1. L cannot exceed 240 bytes.

Reading more than 64 bytes in a single operation is not recommended. In a typical application environment, optimal

transaction time is achieved by reading no more than 32 bytes in a single operation.

CRC:

Communication error detection bytes.

6.12.3. Response Field Descriptions

CID:

The PICC transmits its assigned card ID in the response.

DATA:

The data bytes read from the configuration memory.

Since access rights vary throughout the system zone, the host may provide an authorized starting address, but a length

that causes the device to reach forbidden data. In this case, the device will transmit the authorized bytes, but

unauthorized bytes will be replaced by the "fuse byte". An “Access Denied" status code $BA or $BC will be returned to

indicate that some of the bytes returned were replaced by the “fuse byte”.

ACK:

Acknowledge, the command executed correctly.

NACK:

Not Acknowledge, the command did not execute correctly.

STATUS: PICC status code.

CRC:

Communication error detection bytes.

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5276C–RFID–3/09

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