CLRC663 Datasheet, PDF (12/132 Pages) NXP Semiconductors – Contactless reader IC

NXP Semiconductors
CLRC663
Contactless reader IC
Table 5. Communication overview for ISO/IEC 14443 A/MIFARE reader/writer
Communication
direction
Signal type
Transfer speed
106 kbit/s
212 kbit/s
424 kbit/s
Reader to card (send reader side
data from the CLRC663 modulation
to a card)
fc = 13.56 MHz
bit encoding
100 % ASK
modified Miller
encoding
ASK
modified Miller
encoding
ASK
modified Miller
encoding
bit rate [kbit/s] fc / 128
fc / 64
fc / 32
Card to reader
(CLRC663 receives
data from a card)
card side
modulation
subcarrier
frequency
subcarrier load
modulation
fc / 16
subcarrier load
modulation
fc / 16
subcarrier load
modulation
fc / 16
bit encoding
Manchester
encoding
BPSK
BPSK
848 kbit/s
ASK
modified Miller
encoding
fc / 16
subcarrier load
modulation
fc / 16
BPSK
The CLRC663 connection to a host is required to manage the complete
ISO/IEC 14443 A/MIFARE protocol. Figure 6 shows the data coding and framing
according to ISO/IEC 14443A /MIFARE.
ISO/IEC 14443 A framing at 106 kBd
start
8-bit data
start bit is 1
odd
parity
8-bit data
odd
parity
8-bit data
odd
parity
ISO/IEC 14443 A framing at 212 kBd, 424 kBd and 848 kBd
start
start bit is 0
burst of 32
subcarrier clocks
8-bit data
odd
parity
8-bit data
Fig 6. Data coding and framing according to ISO/IEC 14443 A
odd
parity
8-bit data
even
parity
even parity at the
end of the frame
001aak585
The internal CRC coprocessor calculates the CRC value based on ISO/IEC 14443 A
part 3 and handles parity generation internally according to the transfer speed.
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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