MFRC531 데이터 시트보기 (PDF) - Philips Electronics

부품명

상세내역

제조사

MFRC531

ISO 14443 Reader IC

Philips Electronics 

Philips Semiconductors

ISO 14443 Reader IC

Short From Specification Rev. 2.0 February 2002

MF RC531

3.2 Pin Description

3.2.1 ANTENNA INTERFACE

The contactless antenna interface basically uses four pins:

Name

TX1, TX2

VMID

RX

Type

O Buffered

Analog

I Analog

Function

Antenna Drivers

Reference Voltage

Antenna Input Signal

To drive the antenna the MF RC531 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 RC531 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 RC531 uses a separate power supply for the driver stage.

Name

TVDD

TGND

Type

Power

Power

Function

Transmitter Supply Voltage

Transmitter Supply Ground

3.2.2 ANALOG SUPPLY

For best performance the MF RC531 analog part has a separate supply. It powers the oscillator, the analog

demodulator and decoder circuitry.

Name

AVDD

AGND

Type

Power

Power

Function

Analog Positive Supply Voltage

Analog Supply Ground

3.2.3 DIGITAL SUPPLY

The MF RC531 uses a separate digital supply.

Name

DVDD

DGND

Type

Power

Power

Function

Digital Positive Supply Voltage

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.

6

PUBLIC

Share Link: