AT88RF04C-MY1G View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT88RF04C-MY1G

CryptoRF® Specification

Atmel Corporation 

AT88SC0808/1616/3216/6416CRF, AT88RF04C

E.4.

Security Fuse Programming

Three security fuses are programmed at the end of the personalization process to lock the PICC configuration. The

Write Fuse Byte option of the Write System Zone command is used to program the fuses. A fourth fuse, SEC, is

already programmed by Atmel before CryptoRF leaves the factory. The fuses can only be programmed in the specified

order.

The security fuse programming sequence is as follows:

1. Send Write System Zone command with:

PARAM = $01, ADDR = $06, L = $00, DATA = $00 to program the FAB or ENC fuse.

2. Send Write System Zone command with:

PARAM = $01, ADDR = $04, L = $00, DATA = $00 to program the CMA or SKY fuse.

3. Send Write System Zone command with:

PARAM = $01, ADDR = $00, L = $00, DATA = $00 to program the PER fuse.

The response to each Write System Zone command should be ACK, and the fuse byte contents will be returned in the

STATUS byte. After all three fuses are programmed, the device configuration is locked and personalization is

complete.

E.5.

Secure Personalization

The 88RF PICCs support an optional encrypted personalization mode for programming the device secrets. The Secure

Personalization option is described in Appendix F. This option is not available on 88SC PICCs.

87

5276C–RFID–3/09

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