104
SECTION 5
Write P
rotection
RFID System
User's Manual
SECTION 5
ID Sensor Unit Functions
Setting Write Protection Using the V600 Method
With the V600 Series, different write protection setting methods are used for EEPROM Data Carriers
(V600-D23P
@@
) (without batteries) and SRAM Data Carriers (with batteries). When using V600
commands with the V680-series ID Sensor Unit, the data memory setting in the ID Sensor Unit and the
type of RF Tags can be selected to enable using the previous write protection setting method.
• Using EEPROM RF Tags (V680-D1KP
@@
)
V600 EEPROM Write Protection Method
• Using FRAM RF Tags (V680-D2K/8K/32KF
@@
)
V600 SRAM Write Protection Method
The ID Sensor Unit will automatically switch between the V600 EEPROM write protection method and the V600 SRAM
write protection method. No user setting is required.
V600 EEPROM Write Protection Method
(The following information applies when the V600 write protection
method is set and V680-D1KP
@@
RF Tags are used.)
Write protection is set by writing the end address to be protected in address 0000 hex of the RF Tag.
The area between address 0001 hex and the end address will be write-protected. The status of the
most significant bit of address 0000 hex determines whether write protection is enabled.
Therefore, addresses 0080 to 03E7 hex cannot be set as the end address.
If the end address is set to 00 hex, however, all addresses from 0001 to 03E7 hex will be protected.
Memory Map of Write Protection Setting Area for V600 EEPROM Write Protection Method
• Setting of MSB of Address 0000 Hex
ON: Write protection enabled
OFF: Write protection disabled
• End Address Setting Range
End address: 00 or 01 to 7F hex
If write protection is enabled, write separately to the write protection setting area (address 0000 hex) and the rest of the RF Tag
(addresses 0001 hex and higher). If the MSB of address 0000 hex is ON and you write both the write protection setting area
(address 0000 hex) and following addresses at the same time, a write protection error will occur.
Address (hex)
7
6
5
4
3
2
1
0
0000
Enable/
Disable Bit
End address
Summary of Contents for CJ1W-V680C11
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