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Section 4Data Carrier
RFID System
User's Manual
Section 4
Functions
•SRAM Data Carriers (with Built-in Battery)
Setting Write Protect Function
The write protect function is set in the four bytes of addresses 0002H through 0005H of the Data
Carrier’s memory. The status of the most significant bit of address 0002H determines whether or not
the write protect function is enabled.
•Write-protect Bit (most significant bit of address 0002H)
1: Data is write-protected
0: Data is not write-protected
•Write Protect Setting Area
Start address: 0006H to 1FFFH
End address: 0006H to 1FFFH
Settings to write-protect addresses 0006H through 07FFH
Settings to not write-protect addresses
Address Bit76543210
0002
Ye s /
No
Upper two digits of start address
0003
Lower two digits of start address
0004
Upper two digits of end address
0005
Lower two digits of end address
Address Bit Upper digit Lower digit
0002
1
0000000
80
0003
00000110
06
0004
00000111
07
0005
11111111
FF
Address Bit Upper digit Lower digit
0002
00000000
00
0003
00000110
06
0004
00000111
07
0005
11111111
FF
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