CLRC663 Datasheet, PDF (13/132 Pages) NXP Semiconductors – Contactless reader IC

NXP Semiconductors
CLRC663
Contactless reader IC
8.3.2 ISO/IEC14443B functionality
The physical level of the communication is shown in Figure 7.
ISO/IEC 14443 B
READER
(1)
ISO/IEC 14443 B CARD
(2)
001aal997
(1) Reader to Card NRZ, Miller coded, transfer speed 106 kbit/s to 848 kbit/s
(2) Card to reader, Subcarrier Load Modulation Manchester Coded or BPSK, transfer speed 106 kbit/s
to 848 kbit/s
Fig 7. ISO/IEC 14443 A/MIFARE read/write mode communication diagram
The physical parameters are described in Table 6.
Table 6. Communication overview for ISO/IEC 14443 B reader/writer
Communication
direction
Signal type
Transfer speed
106 kbit/s
212 kbit/s
Reader to card (send reader side
data from the CLRC663 modulation
to a card)
fc = 13.56 MHz
bit encoding
bit rate [kbit/s]
10 % ASK
NRZ
128 / fc
10 % ASK
NRZ
64 / fc
Card to reader
(CLRC663 receives
data from a card)
card side
modulation
subcarrier
frequency
subcarrier load
modulation
fc / 16
subcarrier load
modulation
fc / 16
bit encoding BPSK
BPSK
424 kbit/s
10 % ASK
NRZ
32 / fc
subcarrier load
modulation
fc / 16
BPSK
848 kbit/s
10 % ASK
NRZ
16 / fc
subcarrier load
modulation
fc / 16
BPSK
The CLRC663 connected to a host is required to manage the complete ISO/IEC 14443 B
protocol. The following Figure 8 “SOF and EOF according to ISO/IEC 14443 B” shows the
ISO/IEC 14443B SOF and EOF.
Start of Frame (SOF)
sequence
9.44 μs
UNMODULATED (SUB)
CARRIER
''0'' ''0'' ''0'' ''0'' ''0'' ''0'' ''0'' ''0'' ''0'' ''0''
''1'' ''1'' DATA
CLRC663
Product data sheet
COMPANY PUBLIC
End of Frame (EOF)
sequence
9.44 μs
LAST CHARACTER
''0'' ''0'' ''0'' ''0'' ''0'' ''0'' ''0'' ''0'' ''0'' ''0''
UNMODULATED (SUB)
CARRIER
001aam270
Fig 8. SOF and EOF according to ISO/IEC 14443 B
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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