Bourgogne ET Grasset SAS VEGRDE2 Manual De Usuario
27-07-2002
Vegas Long Range Read/Write Device
Page 43 (48)
Confidentiality Level 1
Vegrde3/EG
Bourgogne et Grasset -– ZI Beaune Savigny -– 21200 Beaune – France – Tel. +33 380 26 26 26 – Fax. +33 3 80 26 26 00
5.3.3. OTP-Byte 1
As soon as the OEM Lock Bit is set to 0 the configuration page cannot be
changed any more!
changed any more!
*) Changing this bit the data carrier cannot be operated any more!
5.3.4. Default Configuration of HITAG VEGAS Data Carriers
HITAG VEGAS data carriers are delivered with the following configuration by Mikron:
Serial Number:
Read Only
-
fixed
Key A, Key B:
Write Only
-
can be changed
Logdata:
Read/Write
-
can be changed
OTP Page:
Read/Write
-
can be changed
Blocks 2 - 7:
Read/Write
-
can be changed
Blocks 4 - 7:
Public Access
-
can be changed
According to that the OTP bytes display the pattern illustrated below:
OTP Byte 0
Bit
7 Bit
0
1 1 1 1 1 1 1 1
OTP Byte 1
Bit
7 Bit
0
0
0
1 1 0 1 1 1
You cannot change Bits 5, 6, and 7 of OTP Byte 1 (gray background). If you attempt to write the
configuration page with a bitmap that changes one of these three bits, the Write command will
be executed without displaying an error message but the memory contents of OTP 1/Bit 5, OTP
1/Bit 6, OTP 1/Bit 7 will remain unchanged.