mfrc531 NXP Semiconductors, mfrc531 Datasheet - Page 61

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

NXP Semiconductors
MFRC531_34
Product data sheet
PUBLIC
10.5.4.1 Page register
10.5.4.2 RxControl1 register
10.5.4 Page 3: Receiver and decoder control
Selects the page register; see
Controls receiver operation.
Table 82.
Table 83.
Bit
Symbol
Access
Bit
7 to 5
SubCPulses[2:0]
4 to 3 ISOSelection[1:0]
2
1 to 0 Gain[1:0]
Symbol
LPOff
RxControl1 register (address: 19h) reset value: 0111 0011b, 73h bit allocation
RxControl1 register bit descriptions
7
SubCPulses[2:0]
Rev. 3.4 — 26 January 2010
R/W
6
Value Description
000
001
010
011
101
110
111
00
10
11
00
01
10
11
056634
Section 10.5.1.1 “Page register” on page
defines the number of subcarrier pulses for each bit
used to select the communication protocol
switches off a low-pass filter at the internal amplifier
defines the receiver’s signal voltage gain factor
5
1 pulse for each bit
2 pulses for each bit
4 pulses for each bit
8 pulses for each bit ISO/IEC 14443 A and
ISO/IEC 14443 B
reserved
reserved
reserved
reserved
ISO/IEC 14443 A and ISO/IEC 14443 B
reserved
20 dB gain factor
24 dB gain factor
31 dB gain factor
35 dB gain factor
ISOSelection[1:0]
4
R/W
3
LPOff
R/W
ISO/IEC 14443 reader IC
2
MFRC531
© NXP B.V. 2010. All rights reserved.
48.
1
Gain[1:0]
R/W
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0