Micro RWD MIFARE

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Micro RWD MIFARE product description

Low-cost proximity RFID reader module fully supporting Philips / NXP (ISO 14443A) Mifare 1k, Mifare 4k, Ultralight and contactless read/write to Mifare ProX and SmartMX cards and tags.

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 7cm whilst maintaining reliable communication and high resilience to EMC corruption. This has been achieved through extensive software and hardware filtering and optimisation techniques.

Pinout diagram

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. Several Output drives are provided for switching external loads and for additional host communication protocols (each output capable of sourcing 25mA).

The latest version of the RWD-MIFARE firmware (also used on the OEM-MIFARE Reader board) has additional features that allow the automatic output of serial number (UID) or card memory data without any host intervention. Automatic data output can be serial or Wiegand protocol. A programmable "BEEP" output is provided to control an audible sounder or other external loads.

The RWD module firmware also makes extensive use of power-down and Sleep modes to achieve very low AVERAGE current consumption of down to 100uA (micro Amps), even when fully active. This makes the IBT reader designs ideal for battery powered applications.

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).

Supported Transponders

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.