ISO 15693

This international standard defines the VCD/VICC communication scheme. It is divided into 3 layers:
1. Defines the hardware characteristics of the VICC,
2. Defines the carrier frequency and the bit-level communication scheme,
3. Defines the frame-level communication scheme, the session opening sequence (anti-collision/inventory), and the command set of the VICC.
All VICCs are memory chips. Their data storage area is divided into blocks. The size of the blocks and the number of them depend on the VICC.
Note that ISO 18000-3 mode 1 is the same as ISO 15693

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