TAGnology_TAGid -125kHz_Protocol.pdf - RFID Webshop

February 1999 Rev. 1.2 Communication Reader-Host
3.8 Command Description for KeyInit Mode
The KeyInit Mode is a mode of the reader for using a set of personalization commands as
described in the following (See also Chapter „Personalization“).
In this mode the BCC is computed by adding all block data bytes including Block Length. The
least significant eight bits are used as BCC.
The command RWD_Key_Init_Mode is used to get from Operating Mode to KeyInit Mode.
Exit of KeyInit Mode is done by the command RWD_Reset or by a failing KI_Write_EE_Data,
KI_Write_Secret2 or KI_Write_Control2.
3.8.1 KI_Reset
This command switches the read/write device back to the Operating Mode.
ATTENTION:
• After the successful execution of this command (answer with KeyInit Mode BCC calculation)
the read/write device enters the Operating Mode and BCC calculation changes.
• In Operating Mode the same command Reset (different BCC calculation) has a different
functionality.
The read/write device changes BCC calculation automatically. On the host system the user is
responsible for the new BCC calculation. The C-Library provides the function
proloc_SetBCCMode ( ).
C-Function: void KI_Reset (void);
Header-File: HitagKeyInit. H
Serial protocol:
HOST - READ/WRITE DEVICE
0x02 'R' 0x54
READ/WRITE DEVICE - HOST
0x02 Status BCC
Status:
0 ... no error
-1 ... SERIAL ERROR
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Protokoll HTRM801 V1.2/C