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MFRC522 Datasheet(PDF) 12 Page - NXP Semiconductors

Part # MFRC522
Description  Contactless Reader IC
PDF  109 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

MFRC522 Datasheet(HTML) 12 Page - NXP Semiconductors

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© NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 3.2 — 22 May 2007
12 of 109
NXP Semiconductors
MFRC522
Contactless Reader IC
1
CRCResultReg
Shows the actual MSB and LSB values of the CRC calculation
2
3
Reserved
Reserved for future use
4
ModWidthReg
Controls the setting of the ModWidth
5
Reserved
Reserved for future use
6
RFCfgReg
Configures the receiver gain
7
GsNReg
Selects the conductance of the antenna driver pins TX1 and TX2 for
modulation
8
CWGsPReg
9
ModGsPReg
ATModeReg
TPrescalerReg
Defines settings for the internal timer
B
C
TReloadReg
Describes the 16 bit timer reload value
D
E
TCounterValReg
Shows the 16 bit actual timer value
F
Page 3: TestRegister
0
Reserved
Reserved for future use
1
TestSel1Reg
General test signal configuration
2
TestSel2Reg
General test signal configuration and PRBS control
3
TestPinEnReg
Enables pin output driver on D1-D7
4
TestPinValueReg Defines the values for D1 - D7 when it is used as I/O bus
5
TestBusReg
Shows the status of the internal testbus
6
AutoTestReg
Controls the digital selftest
7
VersionReg
Shows the version
8
AnalogTestReg
Controls the pins AUX1 and AUX2
9
TestDAC1Reg
Defines the test value for the TestDAC1
A
TestDAC2Reg
Defines the test value for the TestDAC2
B
TestADCReg
Shows the actual value of ADC I and Q
C-F
Reserved
Reserved for production tests
Table 5:
MFRC522 Registers Overview …continued
Addr
(hex)
Register Name
Function



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