mfrc531 NXP Semiconductors, mfrc531 Datasheet - Page 36

• Manufacturer Part Number: mfrc531
• Description: Iso/iec 14443 Reader Ic
• Manufacturer: NXP Semiconductors

NXP Semiconductors
MFRC531_34
Product data sheet
PUBLIC
Fig 13. Serial signal switch block diagram
serial data out
serial data in
serial data processing
(part of)
9.11.1 Serial signal switch block diagram
9.11.2 Serial signal switch registers
MILLER CODER
MANCHESTER
1 OUT OF 256
1 OUT OF 4
DECODER
SERIAL SIGNAL SWITCH
NRZ OR
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.
Figure 13
the serial signal switch enabling the MFRC531 to be used in different configurations.
The serial signal switch can also be used to check the transmitted and received data
during the design-in phase or for test purposes.
analog test signals and measurements at the serial signal switch.
Remark: The SLR400 uses pin name SIGOUT for pin MFOUT. The MFRC531
functionality includes the test modes for the SLRC400 using pin MFOUT.
Section
settings used to configure and control the serial signal switch.
The RxControl2 register DecoderSource[1:0] bits define the input signal for the internal
Manchester decoder and are described in
Source[1:0]
Decoder
2
9.11.2,
0
1
2
3
shows the serial signal switches. Three different switches are implemented in
0
internal
Manchester with subcarrier
Manchester
Section 9.11.2.1
DEMODULATOR
SUBCARRIER
Rev. 3.4 — 26 January 2010
MFIN
056634
and
MFOUT
0
Section 9.11.2.2
envelope
1
MFIN
0
1
Table
digital test signal
signal to MFOUT
Manchester out
Source[1:0]
0
1
2
3
Modulator
Section 15.2.1 on page 101
2
28.
3
MFOUTSelect[2:0]
describe the relevant registers and
DEMODULATOR
SUBCARRIER
MODULATOR
analog circuitry
ISO/IEC 14443 reader IC
(part of)
MFRC531
DEMODULATOR
© NXP B.V. 2010. All rights reserved.
CARRIER
DRIVER
describes the
001aak617
36 of 116
TX1
TX2
RX