33
Electromagnetic Inductive RFID System
User's Manual
S
E
CT
ION 3
Wr
it
e P
ro
tect
io
n
SECTION 3
Functions
Write Protection
The write protection function is a protective function designed to prevent fixed data, such as palette
information or product information, stored in a Tag memory from being erased by accidental overwriting. Any
area of specified addresses can be write protected (a maximum of two areas) by setting protection information
in the Tag. A protection error will occur if a write is executed for any write-protected page.
Part of the user data area ($0000 to $0003) is used for protection area information.
To enable write protection, write the protection area information to a specified address and then use the Tag
Function Setting command (TF) to specify “Protection Setting” in the process designation parameter.
Similarly, to disable write protection, specify “Disable” in the process designation parameter.
when using the write protection function.
* Range for protection area: 0004h to 007Fh
Area $0000 to $0003 cannot be used as data area if the write protection function is used.
Relationship between Protection Information and Protection Area
User address
Description
Data example
$0000
Start address of write protection area 1
05h
$0001
End address of write protection area 1
10h
$0002
Start address of write protection area 2
70h
$0003
End address of write protection area 2
75h
$0004
User area
$0005
Write protection area
1
.
.
$0010
$0011
.
.
$006F
$0070
Write protection area
2
.
.
$0075
$0076
$007F
Summary of Contents for V670-CF01
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