MFRC522_(2007) View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
Manufacturer
MFRC522_ Datasheet PDF : 109 Pages
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NXP Semiconductors
MFRC522
Contactless Reader IC
Table 52: Description of TxSelReg bits
Bit Symbol Description
3 to 0 MFOutSel Selects the input for the MFOUT Pin.
Value
Description
0000
Tristate
0001
Low
0010
High
0011
TestBus signal as defined by bit TestBusBitSel in register
TestSel1Reg.
0100
Modulation signal (envelope) from the internal coder, Miller Puls
Coded
0101
Serial data stream to be transmitted, data stream before Miller
Coder
0110
Reserved
0111
Serial data stream received, data stream after Manchester
Decoder
1000-1111 Reserved
9.2.2.8 RxSelReg
Selects internal receiver settings.
Table 53: RxSelReg register (address 17h); reset value: 84h
Bit
7
6
5
4
3
2
1
0
Symbol
UartSel
RxWait
Access
r/w
r/w
Rights
Table 54: Description of RxSelReg bits
Bit
Symbol Description
7 to 6 UartSel Selects the input of the contactless UART
Value Description
00
Constant Low
01
Manchester with sub-carrier from MFIN pin
10
Modulation signal from the internal analog part, default
11
NRZ coding without sub-carrier from MFIN pin. Only valid for
transfer speeds above 106 kbit/s.
5 to 0
RxWait
After data transmission, the activation of the receiver is delayed for
RxWait bit-clocks. During this ‘frame guard time’ any signal at pin Rx is
ignored.This parameter is ignored by the receive command.
All other commands (e.g. Transceive, MFAuthent) use this parameter.
The counter starts immediately after the external RF field is switched on.
112132
Product data sheet
Rev. 3.2 — 22 May 2007
© NXP B.V. 2007. All rights reserved.
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