• The EM4095 transmits at 125 kHz
• Read RFID tags in the EM4100 family
• The signal is encoded using the Manchester encoding standard
• Built-in antenna on circuit
• Operating voltage 4.5V - 5V
• Compact size: 48mm x 65mm
• Design library support for Altium, Eagle, Orcad
• Code sample support for PIC

The Rfid Reader is powered by an external power supply connected to the Rfid Reader. When Rfid Reader is turned on, a voltage of 125 kHz is provided on the integrated antenna on the circuit. The antenna starts to emit a magnetic field needed to read the code stored in the RFID tag. This code is sent from the RFID tag when placing the RFID tag on the antenna surface on the RFID Reader. This code is received through the antenna and sends the signal to the microcontroller.

The Rfid Reader communicates with the external microcontroller via a 1x6 connector and "ATCBus" on the circuit.

• GND: GND source
• 5V: VCC source (4.5V - 5V)
• MOD: output signal from EM4095
• RDY: clock pulse generator
• SHD: High voltage on this foot puts EM4095 to sleep mode.
• MOD: The high voltage on this pin allows the modulation signal on the antenna to start

RFID READER Rev 1.1 www.at-sky.com.vn

Source code reference: Use CCS compiler and use PIC16F887 microcontroller

#include

#include

#fuses HS, NOWDT, NOPROTECT, NOLVP, NOBROWNOUT, PUT

#include // Controls the reader IC

#include // Allows reading 4102 transponders

#include

#use delay(clock=12000000)

//#use rs232(baud=9600, xmit=PIN_c6,rcv=PIN_c7)

#byte porta=0x05

#byte portb=0x06

#byte portc=0x07

#byte portd=0x08

#byte porte=0x09

#define buzzer pin_a3

//#bit RB5 =0x06.5

int8 msg[32];

int8 so1,so2,so3,so4,so5,so6,so7,so8,so9,so10;

void main()

{

lcd_putc("\f");

lcd_init();

delay_ms(100);

  lcd_gotoxy(3,2);

   printf(lcd_putc,"at-sky.com.vn");

    lcd_gotoxy(4,1);

     printf(lcd_putc,"Rfid Reader");

int8 customerCode;

int32 tagNum;

rf_init(); // Initialize the RF reader

rf_powerUp(); // Power up the antenna

delay_ms(3000);

while(1)

{

if(read_4102(msg)) {

lcd_gotoxy(14,2);

customerCode = msg[0];

tagNum = make32(msg[1], msg[2], msg[3],msg[4]);

so1=tagnum;

so2=(tagnum0)/10;

so3=(tagnum00)/100;

so4=(tagnum000)/1000;

so5=(tagnum0000)/10000;

so6=(tagnum00000)/100000;

so7=(tagnum000000)/1000000;

so8=(tagnum0000000)/10000000;

so9=(tagnum00000000)/100000000;

so10=(tagnum00000000)/1000000000;

                lcd_gotoxy(1,2);

   printf(lcd_putc,"code: ");

     printf(lcd_putc,"\%u",so10);

    printf(lcd_putc,"\%u",so9);

     printf(lcd_putc,"\%u",so8);

      printf(lcd_putc,"\%u",so7);

       printf(lcd_putc,"\%u",so6);

        printf(lcd_putc,"\%u",so5);

         printf(lcd_putc,"\%u",so4);

          printf(lcd_putc,"\%u",so3);

           printf(lcd_putc,"\%u",so2);

            printf(lcd_putc,"\%u",so1);

             delay_ms(10);

}}

}