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Hitag 2 RFID Products |
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| Hitag 2 RFID Receiver Module | ||
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| Hitag 2 Transponder Card | ||
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| Documentation | ||
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| The RWD-HITAG2 is a complete RFID reader and tag acceptance solution. The Hitag protocols are standards developed by Philips Semiconductor, the reader will support any RFID tags using this protocol including our CARD-H2 transponder card. Also a wide variety of tag types are available which support this protocol from Sokymat. The RFID receiver only needs a 700uH antenna coil connected and 5v DC supply to be a fully featured read/write system. The module provides internal EEPROM memory for holding lists of authorised identity codes, a manual override switch facility and has LED drives to give visual indication of acceptance. The RWD also has a TTL level RS232 interface that allows a host system to communicate with the RWD if necessary, so that system features can be customised, configurations changed and tag read/write data handled by the host system. The Hitag 2 transponders provide 256 bits (32 bytes) of read/write EEPROM memory arranged as 8 partitioned 32 bit pages. An area of 128 bits (16 bytes) is open for general user data. The Hitag 2 transponders are configurable for different modes of operation and the MircoRWD H2 version supports the high security PASSWORD mode only. This feature uses two password codes stored both in the H2 transponder and the RWD that are mutually exchanged when a tag is brought into the RF field; the tag is only unlocked for read/write operations if these codes exactly agree. The use of this Mutual Authentication process, encrypted communications and a pulsed RF field ensures that the MicroRWD H2 reader system is very secure. The MicroRWD is essentially a proximity system and a Read/Write range of up to 20cm can be achieved with the same level of reliable communication and EMC resilience. The unique AST (Adaptive Sampling) feature allows the RWD to continually adjust and retune the sampling to allow for inductive changes in the RF field, an essential feature for real- world reliability and robust operation. The communication protocol with the tags can achieve 4k bits/second of data transfer and the total time to read a 32 bit page takes less than 50ms. The MicroRWD can be easily integrated into almost any application; when power (5v DC) is first applied to the board the red and green LEDs flash once to indicate successful power-up. The device can also check for broken or shorted antenna and can even detect very badly tuned antennas; these problems are indicated by the red LED flashing continuously until the fault has been rectified. The MicroRWD will normally have the red LED lit until a valid card or tag is brought into the RF field. If the tag is accepted as valid then the green LED is lit and the output drivers (OP0, OP1, OP2, OP3) are switched on. These outputs can be connected together to give up to 100ma of drive current for operating a relay etc. In addition, a switch input is provided for overriding the tag reading operation and switching the output drives directly. Technical documentation is available on these products from the IB Technology Website. |
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