RFID products
Products – Micro RWD MF (Mifare)
  Low-cost proximity RFID reader module supporting Philips (ISO 14443A)
Mifare 1k (S50), Mifare 4k (S70) and Mifare Ultralight transponders/cards.

The module is completely housed within a 24-pin DIP package (pin compatible with
other modules) and only requires a 5v supply and a 1 micro-Henry antenna board to
be a fully featured read/write and tag acceptance system.

The RWD module has outstanding RF drive capability and has a read/write range to
ISO card size tags of up to 10cm whilst maintaining reliable communication and
high resilience to EMC corruption. This has been achieved through extensive
software and hardware filtering and optimisation techniques.

 		    

The RWD module has a TTL level RS232 interface that allows a host system to send
and receive easy-to-use optimised commands/data (for example: Ascii “R” command
to read tag data and Ascii “W” command to write tag data).

The RWD also has internal EEPROM memory for holding system parameters, security
key codes, lists of authorised serial numbers and supports direct LED drives to give
visual indication of acceptance. Up to 50ma of drive current is also provided as an
output that can be used to switch external loads.

Download Micro RWD MF (Mifare) data sheet

Different firmware versions are available which have additional features for specific
applications and use the spare I/O pins for auxiliary data outputs in different protocols.

New Version

The RWD-MIFARE-LP (Low-power) version has an additional "BEEP" output and auxiliary
outputs for automatic serial/Wiegand data. This version uses dynamic polling and sleep mode
techniques to achieve an average power consumption of less than 100uA (micro Amps) even
when fully active.

Download RWD-MIFARE (Low-power) data sheet

We can customise RWD interface and features for your application, contact us for
more information

Basic electrical specification (standard RWD-MIFARE) without LEDs fitted etc.


  
Parameter
Typical Value
Supply Voltage 5v DC
Operating temperature -25 deg C to + 70 deg C
Average current consumption with default polling cycle delay 20ma
Peak antenna voltage (optimum tuned antenna) 60v
Peak current (Antenna tuned with IBT evaluation antenna)

(NOTE RF IS NORMALLY OFF AND IS ONLY TURNED ON DURING TAG COMMUNICATION RESULTING IN VERY SHORT BURST OF UP TO 150MA CURRENT CONSUMPTION)

 150ma max
Communication time for Tag authentication (mifare) 5ms
Communication time for 128 bit WRITE operation 2ms
Maximum data rate (between Tag and RWD) 106k bits/sec
Range (dependent on antenna dimensions) Up to 10cm
Auxiliary output drive Up to 50ma sink
9600/38400 baud select input (pulled up) , default 9600 baud Pulled low selects 38400 baud
Serial Interface TTL level RS232
Communication Parameters 9600 baud, 8 data bits, no parity, 1 stop bit protocol
with CTS handshake
   
       
Micro RWD MIFARE
click on the image to
enlarge
 
     

 
     
Mifare 1k has 1024 bytes of read/write memory (4k version has 4096 bytes of memory) which is divided up into 16 segments (40 on 4k version), each secured by programmable key codes.

Ultralight has a 256 byte read/write memory without the key code security. All Mifare cards have a unique serial number factory-programmed at the first location in memory.

    
     
       

Copyright IB Technology (Eccel Technology Ltd, registered in England No. 5614911)
Registered Office: PO Box 747, Aylesbury, Buckinghamshire, HP22 9BG, UK.
Site last updated 12th February 2008