TAGnology_TAGid -125kHz_Protocol.pdf - RFID Webshop

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Personalization Rev. 1.2 February 1999 Level 0: Level 1: Level 2: All security relevant data can be read and written. The data cannot be read any more. If you want to change an entry, you have to know the old value. Otherwise writing access will be denied. The internal data are locked and can neither be read nor written. At this level it is impossible for the user to change the stored data. You cannot reset levels, e.g. from level 2 to level 1. Once a security level has been chosen it becomes irreversible. The functionality of this mechanism is based on the control bytes Control_RW (only for HITAG 1), Control_WO (only for HITAG 1) and Control_LT (only for HITAG 2). All control bytes are located in EEPROM of the read/write device. On delivery of a read/write device all bits of Control_RW, Control_WO and Control_LT are set to 1, except Bit 7 of CONTROL_RW (serial number). Protokoll HTRM801 V1.2/C Page 96 (107)
February 1999 Rev. 1.2 Personalization Control_RW (only HITAG 1): Control_RW (located in EEPROM of the read/write device) controls read accesses to the following data: ATTENTION: You cannot change bits that have once been set to 0 ! BIT NUMBER BIT NAME BIT-VALUE = 1 BIT-VALUE = 0 7 Serial Number - read allowed 6 Logdata1B read allowed read prohibited 5 Logdata1A read allowed read prohibited 4 Logdata1A read allowed read prohibited 3 Logdata1A read allowed read prohibited 2 Key A read allowed read prohibited 1 Key B read allowed read prohibited 0 Password read allowed read prohibited Page 97 (107) Protokoll HTRM801 V1.2/C
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TAGnology RFID GmbH | Grazer Vorsta
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TAGnology_TAGid -125kHz_Protocol.pdf - RFID Webshop

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