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MFRC500 Datasheet(PDF) 6 Page - NXP Semiconductors

Part # MFRC500
Description  Highly Integrated ISO 14443A Reader IC
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

MFRC500 Datasheet(HTML) 6 Page - NXP Semiconductors

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Philips Semiconductors
Short Form Specification Rev. 2.0 January 2002
Highly Integrated ISO 14443A Reader IC
MF RC500
6
PUBLIC
3.2 Pin Description
3.2.1 ANTENNA INTERFACE
The contactless antenna interface basically uses four pins:
Name
Type
Function
TX1, TX2
O Buffered
Antenna Drivers
VMID
Analog
Reference Voltage
RX
I Analog
Antenna Input Signal
To drive the antenna the MF RC500 provides the energy carrier of 13.56 MHz through TX1 and TX2. This
signal is modulated by the transmitting data according the register settings.
The card responds with load modulation of the RF field. The resulting signal picked up by the antenna is
coupled out from the antenna matching circuit and forwarded to the RX-pin. Inside the MF RC500 the
receiver senses and demodulates the signal and processes it according to the register settings. Data is
passed further on to the parallel interface where it is accessible by the µ-Controller.
The MF RC500 uses a separate power supply for the driver stage.
Name
Type
Function
TVDD
Power
Transmitter Supply Voltage
TGND
Power
Transmitter Supply Ground
3.2.2 ANALOG SUPPLY
For best performance the MF RC500 analog part has a separate supply. It powers the oscillator, the analog
demodulator and decoder circuitry.
Name
Type
Function
AVDD
Power
Analog Positive Supply Voltage
AGND
Power
Analog Supply Ground
3.2.3 DIGITAL SUPPLY
The MF RC500 uses a separate digital supply.
Name
Type
Function
DVDD
Power
Digital Positive Supply Voltage
DGND
Power
Digital Supply Ground
3.2.4 AUXILLARY PIN
Internal signals may be selected to drive this pin. It is used for design-in support and test purpose.


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