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- RFID confusion
- passive 1-bit tags
- ro/rw memory
- state machines for permission checking
- contactless smartcards (processor chip cards, ...)
- processor chip cards
- typically 8bit micrprocessor (e.g. 8051 based)
- MMU (!)
- typical configuration: 1k RAM, 32k Flash, 70k mask ROM
- ISO 14443 "proximity cards"
- 14443-1 (physical specification)
- 13.56 MHz
- 14443-2 (radio interface)
- power transmission from reder (PCD) to card (PICC)
- 13.56MHz +- 7kHz
- field strength 1.5A/m to 7.5A/m (rms)
- channel from reader to card
- Type A: carrier modulation with 100% ASK, modified miller code
- Type B: carrier modulation with 10% ASK, NRZ-L code
- channel from card to reader
- Type A: load modulation on subcarrier fc/16, OOK, manchester code
- Type B: load modulation on subcarrier fc/16, BPSK, NRZ-L code
- 14443-3 (anti collision)
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- biometric passport
- technical view
- iso 7816-4 command based processor chip card
- iso 14443-{1,2,3,4} based RFID interface
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