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TAGnology_TAGid -125kHz_Protocol.pdf - RFID Webshop

TAGnology_TAGid -125kHz_Protocol.pdf - RFID Webshop

TAGnology_TAGid -125kHz_Protocol.pdf - RFID Webshop

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February 1999 Rev. 1.2 Personalization<br />

Control_LT (only HITAG 2):<br />

Control_LT (located in EEPROM of the read/write device) controls write accesses to the<br />

following data:<br />

ATTENTION:<br />

You cannot change bits that have once been set to 0 !<br />

BIT NUMBER BIT NAME BIT-VALUE = 1 BIT-VALUE = 0<br />

7 Key RW/WO read allowed read prohibited<br />

6 Key WO/0 write allowed read/write prohibited<br />

5 Passw. TAG RW/ read allowed read prohibited<br />

WO<br />

4 Passw. TAG WO/0 write allowed read/write prohibited<br />

3 Passw. RWD<br />

read allowed read prohibited<br />

RW/WO<br />

2 Passw. RWD WO/0 write allowed read/write prohibited<br />

1 Check PW TAG *) Off On<br />

0 Config Lock read/write of<br />

Control_LT allowed<br />

only read of<br />

Control_LT allowed<br />

*) Note for Bit 1 of Control_LT:<br />

If the HITAG 2 transponder is in Password or Crypto Mode and a GetSnr_LT command is<br />

processed, the incoming Password TAG of the transponder is checked whether it matches<br />

with the Password TAG of the reader. If it doesn’t, the read/write device transmits the errormessage<br />

INCORRECT PASSWORD TAG to the host.<br />

We recommend to activate „Check PW TAG“ (set bit 1 to zero) in order to increase the<br />

security for GetSnr_LT and PollTags commands.<br />

Page 99 (107)<br />

Protokoll HTRM801 V1.2/C

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