mfrc522 NXP Semiconductors, mfrc522 Datasheet - Page 29

• Manufacturer Part Number: mfrc522
• Description: Contactless Reader Ic
• Manufacturer: NXP Semiconductors

NXP Semiconductors
112132
Product data sheet
9.2.2.8 RxSelReg
Table 52:
Selects internal receiver settings.
Table 53:
Table 54:
Bit
3 to 0
Bit
7 to 6
5 to 0
Symbol
Access
Rights
Bit
Symbol
MFOutSel
Symbol
UartSel
RxWait
Description of TxSelReg bits
Description of RxSelReg bits
RxSelReg register (address 17h); reset value: 84h
7
UartSel
r/w
Description
Selects the input for the MFOUT Pin.
Value
0000
0001
0010
0011
0100
0101
0110
0111
1000-1111 Reserved
Description
Selects the input of the contactless UART
Value
00
01
10
11
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.
Rev. 3.2 — 22 May 2007
6
Description
Tristate
Low
High
TestBus signal as defined by bit TestBusBitSel in register
TestSel1Reg.
Modulation signal (envelope) from the internal coder, Miller Puls
Coded
Serial data stream to be transmitted, data stream before Miller
Coder
Reserved
Serial data stream received, data stream after Manchester
Decoder
Description
Constant Low
Manchester with sub-carrier from MFIN pin
Modulation signal from the internal analog part, default
NRZ coding without sub-carrier from MFIN pin. Only valid for
transfer speeds above 106 kbit/s.
5
4
3
RxWait
r/w
2
Contactless Reader IC
MFRC522
© NXP B.V. 2007. All rights reserved.
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