mfrc531 NXP Semiconductors, mfrc531 Datasheet - Page 102
mfrc531
Manufacturer Part Number
mfrc531
Description
Iso/iec 14443 Reader Ic
Manufacturer
NXP Semiconductors
Datasheet
1.MFRC531.pdf
(116 pages)
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NXP Semiconductors
MFRC531_34
Product data sheet
PUBLIC
15.2.1.2 RX control
Figure 26
beginning of a card’s answer to a request signal.
The RF signal shows the RF voltage measured directly on the antenna so that the card’s
load modulation is visible. Setting MFOUTSelect[2:0] = 011 shows the Manchester
decoded signal with subcarrier. Setting MFOUTSelect[2:0] = 100 shows the Manchester
decoded signal.
Fig 25. TX control signals
(1) MFOUTSelect[2:0] = 001; serial data stream; 2 V per division.
(2) MFOUTSelect[2:0] = 010; serial data stream; 2 V per division.
(3) RFOut; 1 V per division.
(1)
(2)
(3)
shows an example of ISO/IEC 14443 A communication which represents the
Rev. 3.4 — 26 January 2010
056634
10 μs per division
ISO/IEC 14443 reader IC
MFRC531
© NXP B.V. 2010. All rights reserved.
001aak626
102 of 116
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