Commands
2597
78 2013-
02
111
The individual bits have the following meanings:
IPC03 password mode
If the password mode in the data carrier is activated, the data range of the data
carrier is read and write-protected and can only be read or written if the R/W head
sends the correct password to the data carrier.
If the password mode in the data carrier is deactivated, every data word on the
data carrier can be read or written.
The default password of the R/W heads and the data carrier is 00000000h. In the
R/W head, the password is stored in the volatile memory and in the data carrier,
the password is stored in the non-volatile memory.
To read or write the "Protection Word" and the "Control Word", you must first enter
the password in the password mode (see the commands
SC
or
EC
).
You can also limit access to the data carriers by defining the start and end of a
read-protected and a write-protected range in the Protection Word.
Setting the password
1. Enter the correct password once with the command
PS
(set password).
2. Activate the password mode with the command
PM
(set password mode).
The password in the R/W head and on the read/write tag can be changed with the
command
PC
.
If the password mode is deactivated, every data word on the read/write tag can be
read and written as necessary.
Protection word
Bit
Meaning
Byte
0 ... 7
First read-protected word
0
8 ... 15
Last read-protected word
1
16 ... 23
First write-protected word
2
24 ... 31
Last write-protected word
3
Control word
Bit
Meaning
Byte
0 ... 7
Read range start
0
8 ... 15
Read range end
1
16
Password mode on/off
2
17
"Read after write" operating mode
on/off
18 ... 23
Open
24 ... 31
Open
3
