CLRC663 datasheet(16/177 Pages) NXP

16 / 177 page

NXP Semiconductors

CLRC663

High performance multi-protocol NFC frontend CLRC663 and CLRC663 plus

001aak585

ISO/IEC 14443 A framing at 106 kBd

8-bit data

odd

parity

odd

parity

start

odd

parity

start bit is 1

ISO/IEC 14443 A framing at 212 kBd, 424 kBd and 848 kBd

8-bit data

odd

parity

odd

parity

start

even

parity

start bit is 0

burst of 32

subcarrier clocks

even parity at the

end of the frame

Figure 6. Data coding and framing according to ISO/IEC 14443 A

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.

8.3.2 ISO/IEC14443 type B functionality

The physical level of the communication is shown in the following figure:

(1)

(2)

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ISO/IEC 14443 B CARD

ISO/IEC 14443 B

READER

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

Figure 7. ISO/IEC 14443 type B communication diagram

The physical parameters are described in the following table:

Transfer speed

Communication

direction

Signal type

106 kbit/s

212 kbit/s

424 kbit/s

848 kbit/s

reader side

modulation

10 % ASK

bit encoding

NRZ

Reader to card (send

data from the CLRC663

to a card)

fc = 13.56 MHz

bit rate [kbit/s]

128 / fc

64 / fc

32 / fc

16 / fc

card side

modulation

subcarrier load

modulation

subcarrier load

modulation

subcarrier load

modulation

subcarrier load

modulation

subcarrier

frequency

fc / 16

Card to reader

(CLRC663 receives

data from a card)

bit encoding

BPSK

Table 8. Communication overview for ISO/IEC 14443 B reader/writer

The CLRC663 connected to a host is required to manage the complete ISO/IEC 14443 B protocol. The

following figure shows the ISO/IEC 14443B SOF and EOF.

CLRC663

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 5.3 — 3 January 2024

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