mfrc531 NXP Semiconductors, mfrc531 Datasheet - Page 67

• Manufacturer Part Number: mfrc531
• Description: Iso/iec 14443 Reader Ic
• Manufacturer: NXP Semiconductors

NXP Semiconductors
MFRC531_34
Product data sheet
PUBLIC
10.5.5.7 MFOUTSelect register
10.5.5.8 PreSet27 register
Selects the internal signal applied to pin MFOUT.
Table 105. MFOUTSelect register (address: 26h) reset value: 0000 0000b, 00h bit allocation
Table 106. MFOUTSelect register bit descriptions
[1]
Table 107. PreSet27 (address: 27h) reset value: xxxx xxxxb, xxh bit allocation
Bit
Symbol
Access
Bit
7 to 3 00000
2 to 0 MFOUTSelect[2:0]
Bit
Symbol
Access
Only valid for MIFARE and ISO/IEC 14443 A communication at 106 kBd.
Symbol
7
W
7
x
Rev. 3.4 — 26 January 2010
6
W
6
x
Value
-
000
001
010
011
100
101
110
111
5
056634
00000
R/W
W
5
x
Description
these values must not be changed
defines which signal is routed to pin MFOUT:
constant LOW
modulation signal (envelope) from the internal
encoder, (Miller coded)
serial data stream, not Miller encoded
modulation signal)
(Manchester encoded card signal)
reserved
reserved
constant HIGH
output signal of the energy carrier demodulator (card
output signal of the subcarrier demodulator
4
W
4
x
W
3
x
[1]
3
ISO/IEC 14443 reader IC
W
2
x
2
MFOUTSelect[2:0]
MFRC531
[1]
© NXP B.V. 2010. All rights reserved.
W
R/W
1
x
1
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W
0
0
x