CLRC661 datasheet(14/152 Pages) NXP

Part #	CLRC661

Description	High performance NFC frontend CLRC661 plus

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Manufacturer	NXP [NXP Semiconductors]

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NXP Semiconductors

CLRC661

High performance NFC frontend CLRC661 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/IEC15693

The physical parameters are described in the following table:

Transfer speed

Communication

direction

Signal type

fc / 8192 kbit/s

fc / 512 kbit/s

reader side

modulation

10 % to 30 % ASK or

100 % ASK

10 % to 30 % ASK 90 %

to 100 % ASK

bit encoding

1/256

1/4

Reader to label

(send data from the

CLRC661 to a card)

data rate

1.66 kbit/s

26.48 kbit/s

Table 6. Communication overview for ISO/IEC 15693 reader/writer reader to label

Transfer speed

Communication

direction

Signal type

6.62 (6.67) kbit/s 13.24 kbit/s[1] 26.48

(26.69) kbit/s

52.96 kbit/s

card side

modulation

not supported

not supported single (dual)

subcarrier

load

modulation

ASK

single

subcarrier

load

modulation

ASK

bit length

(μs)

-

37.76 (37.46) 18.88

Label to reader

(CLRC661

receives data

from a card)

fc = 13.56 MHz

bit encoding -

-

Manchester

coding

Manchester

coding

subcarrier

frequency

[MHz]

-

fc / 32 (fc /

28)

fc / 32

Table 7. Communication overview for ISO/IEC 15693 reader/writer label to reader

CLRC661

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

Product data sheet

Rev. 3.7 — 23 June 2021

COMPANY PUBLIC

456937

14 / 152

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