HT-CM400 NXP Semiconductors, HT-CM400 Datasheet - Page 64

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HT-CM400

Manufacturer Part Number
HT-CM400
Description
Ht Cm400; Ht Rm440 Family; Ht Rm800 Family Interface Protocol Reader - Host
Manufacturer
NXP Semiconductors
Datasheet
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 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.
3.8.1 Reset
This command switches the read/write device back to the Operating Mode.
ATTENTION:
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);
Header-File: PROLIB6.H
Serial protocol:
HOST - READ/WRITE DEVICE
READ/WRITE DEVICE - HOST
Status:
Htswp.doc/HS
0x02
0x02
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.
Status
'R'
-1 ... SERIAL ERROR
0 ... no error
0x54
BCC
Page 64 (104)
Rev. 1.0
98-02-10

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