CLRC663 Datasheet, PDF (17/132 Pages) NXP Semiconductors – Contactless reader IC

NXP Semiconductors
CLRC663
Contactless reader IC
8.3.7.1 Passive communication mode
Passive communication mode means that the target answers to an initiator command in a
load modulation scheme. The initiator is active meaning generating the RF field.
1. initiator starts communication
at selected transfer speed
host
NFC INITIATOR
host
NFC TARGET
powered to
generate RF field
2. targets answers using
load modulated data
at the same transfer speed
powered for
digital processing
Fig 11. Passive communication mode
001aan217
Table 12. Communication overview for Passive communication mode
Communication
direction
106 kbit/s
212 kbit/s
424 kbit/s
Initiator  target
According to
ISO/IEC 14443A
100 % ASK, Modified
Miller Coded
According to FeliCa, 8 % to 30 % ASK
Manchester Coded
Target  initiator
According to
ISO/IEC 14443A subcarrier
load modulation,
Manchester Coded
According to FeliCa, > 12 % ASK
Manchester Coded
The contactless UART of CLRC663 and a dedicated host controller are required to handle
the ISO/IEC 18092 passive initiator protocol.
CLRC663
Product data sheet
COMPANY PUBLIC
All information provided in this document is subject to legal disclaimers.
Rev. 3.3 — 3 April 2012
171133
© NXP B.V. 2012. All rights reserved.
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