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MFRC500 Datasheet(PDF) 6 Page - NXP Semiconductors |
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MFRC500 Datasheet(HTML) 6 Page - NXP Semiconductors |
6 / 12 page ![]() 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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