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CLRC632_35
NXP B.V. 2009. All rights reserved.
Product data sheet
PUBLIC
Rev. 3.5 — 10 November 2009
073935
38 of 126
NXP Semiconductors
CLRC632
Multiple protocol contactless reader IC (MIFARE/I-CODE1)
Remark: Pin MFIN can only be accessed at 106 kBd based on ISO/IEC 14443 A. The
Manchester signal and the Manchester signal with subcarrier can only be accessed on pin
MFOUT at 106 kBd based on ISO/IEC 14443 A.
9.11.1 Serial signal switch block diagram
Figure 14 shows the serial signal switches. Three different switches are implemented in
the serial signal switch enabling the CLRC632 to be used in different congurations.
The serial signal switch can also be used to check the transmitted and received data
analog test signals and measurements at the serial signal switch.
Remark: The SLR400 uses pin name SIGOUT for pin MFOUT. The CLRC632
functionality includes the test modes for the SLRC400 using pin MFOUT.
settings used to congure and control the serial signal switch.
9.11.2 Serial signal switch registers
The RxControl2 register DecoderSource[1:0] bits dene the input signal for the internal
Manchester decoder and are described in
Table 30.Fig 14. Serial signal switch block diagram
3
001aak617
MFIN
MFOUT
MODULATOR
DRIVER
(part of)
analog circuitry
SUBCARRIER
DEMODULATOR
TX1
TX2
RX
CARRIER
DEMODULATOR
2
MILLER CODER
1 OUT OF 256
NRZ OR
1 OUT OF 4
MANCHESTER
DECODER
SERIAL SIGNAL SWITCH
(part of)
serial data processing
Decoder
Source[1:0]
2
Modulator
Source[1:0]
SUBCARRIER
DEMODULATOR
serial data out
00
1
internal
2
Manchester with subcarrier
3
0
1
2
3
4
5
6
0
1
envelope
MFIN
0
1
2
3
Manchester
Manchester out
serial data in
7
0
01
1
en
v
elope
tr
ansmit
NRZ
Manchester
with
subcarr
ier
Manchester
reser
v
e
d
reser
v
e
d
MFOUTSelect[2:0]
digital test signal
signal to MFOUT