HT-CM400 NXP Semiconductors, HT-CM400 Datasheet - Page 64
Manufacturer Part Number
Ht Cm400; Ht Rm440 Family; Ht Rm800 Family Interface Protocol 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 KeyInitMode is used to get from Operating Mode to KeyInit Mode.
Exit of KeyInit Mode is done by the command Reset or by a failing WriteEEPROM,
WriteSecret_LT or WriteControl_LT.
This command switches the read/write device back to the Operating Mode.
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 proloc_Reset (void);
HOST - READ/WRITE DEVICE
READ/WRITE DEVICE - HOST
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
-1 ... SERIAL ERROR
0 ... no error
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