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MFRC522 Datasheet(PDF) 14 Page - NXP Semiconductors

No. de pieza MFRC522
Descripción Electrónicos  Contactless reader IC
PDF  96 Pages
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Fabricante Electrónico  NXP [NXP Semiconductors]
Página de inicio  http://www.nxp.com
Logo NXP - NXP Semiconductors

MFRC522 Datasheet(HTML) 14 Page - NXP Semiconductors

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Remark: The data byte can be sent directly after the address byte on pin RX.
Address byte: The address byte has to meet the following format:
The MSB of the first byte sets the mode used. To read data from the MFRC522, the MSB is set to logic 1. To write data to the
MFRC522 the MSB is set to logic 0. Bit 6 is reserved for future use, and bits 5 to 0 define the address; see Table 14.
(1) Reserved.
Fig 10. UART write data timing diagram
001aak589
SA
ADDRESS
RX
TX
MX
DTRQ
A0
A1
A2
A3
A4
A5
(1)
SO
SA
D0
D1
D2
D3
D4
D5
D6
D7
SO
SA
A0
A1
A2
A3
A4
A5
(1)
SO
DATA
ADDRESS
R/W
R/W



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