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TAGnology_TAGid -125kHz_Protocol.pdf - RFID Webshop

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Transponders Rev. 1.2 February 1999<br />

Configuration Byte 1:<br />

7 6<br />

5 4<br />

3 2<br />

1 0<br />

Access type for Blocks 4 to 7: "0" ... SECRET<br />

"1" ... PUBLIC<br />

reserved<br />

reserved<br />

reserved<br />

OEM Lock Bit: "1" ... Configuration Page is r/w<br />

"0" ... Configuration Page is ro<br />

reserved<br />

reserved<br />

reserved<br />

Configuration Byte 1 / Bit 5 ... 7:<br />

These three bits are reserved.<br />

ATTENTION: When writing a new value to byte Configuration Byte 1, bit positions<br />

marked as „reserved“ must not be altered. To meet that condition read the current<br />

Configuration Byte 1 value and mask in your new values for bit positions you are allowed<br />

to change.<br />

Configuration Byte 1 / Bit 4:<br />

Bit= ‘1’: Configuration Page can be read and written to.<br />

Bit= ‘0’: Configuration Page can only be read. This process is irreversible !<br />

ATTENTION: Do not set Bit 4 of Configuration Byte 1 to ‘0’ before having written the<br />

final data into the Configuration Page of the transponder.<br />

Configuration Byte 1 / Bits 1 ... 3:<br />

These three bits are reserved.<br />

ATTENTION: When writing a new value to byte Configuration Byte 1, bit positions<br />

marked as „reserved“ must not be altered. To meet that condition read the current<br />

Configuration Byte 1 value and mask in your new values for bit positions you are allowed<br />

to change.<br />

Configuration Byte 1 / Bit 0:<br />

Bit= ‘0’: Access type for Blocks 4 to 7 is SECRET.<br />

Bit= ‘1’: Access type for Blocks 4 to 7 is PUBLIC.<br />

This bit can be set or reset until Bit 4 of Configuration Byte 1 is set to ‘0’.<br />

Protokoll HTRM801 V1.2/C Page 88 (107)

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