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MFOUT
TX bit stream
MILLER
CODER
DIGITAL MODULE
MFRC522
3-state 0
LOW 1
HIGH 2
test bus 3
internal envelope 4
TX serial data stream 5
reserved 6
RX serial data stream 7
MFOutSel[3:0]
3-state 0
TX2
internal envelope 1
MODULATOR
DRIVER
envelope from pin MFIN 2
TX1
HIGH
3
DRIVER
Sel[1:0]
ANALOG MODULE
MFRC522
RX bit stream
MANCHESTER
DECODER
0 LOW
SUBCARRIER
DEMODULATOR
1 Manchester with subcarrier
2 internal modulated
UART 3 NRZ coding without subcarrier (> 106 kBd)
Sel[1:0]
DEMODULATOR
RX
MFIN
001aak594
Fig 21. Overview of MFIN and MFOUT signal routing