User`s manual
107
RFID System
User’s Manual
Section 4
Write Protection Function
Section 4
Functions
Write Protection Function
The write protection function prevents important data stored in the ID Tag, such as the product type and
model, from being overwritten by other data and lost. Use the following method to set write protection after
writing important data.
The write protection function can be enabled or disabled with the PARAMETER SET command (SP).
p.102
Setting Write Protection
The write protection function is set in the four bytes of addresses 0000 through 0003 (hex) of the ID
Tag's memory. The status of the most significant bit of address 0000 (hex) determines whether or not
the write protection function is enabled for individual ID Tags.
• Write-protection Bit (most significant bit of address 0000 (hex))
1: Data is write-protected
0: Data is not write-protected
• Write Protection Setting Area
Start address: 0000 to 7FFF(hex)
End address: 0000 to FFFF(hex)
Settings to Write-protect Addresses 0006 through 07FF (hex)
Settings to Not Write-protect Addresses
The DATA FILL command will write data even to areas of the Tag for which write protection has been set. Confirm that there is no
important data in the area being written before executing this command.
Address (hex) Bit7 6543210
0000 Yes/No Upper two digits of start address
0001 Lower two digits of start address
0002 Upper two digits of end address
0003 Lower two digits of end address
Address (hex) Bit Upper digit Lower digit
0000
1
0000000
80
0001
00000110
06
0002
00000111
07
0003
11111111
FF
Address (hex) Bit Upper digit Lower digit
0000
H
00000000
00
0001
H
00000110
06
0002
H
00000111
07
0003
H
11111111
FF