Lock Function - Omron V720S Series Operation Manual

Lock Function

3-3

Lock Function

■ Lock setting in ISO mode
■ Lock setting in I.CODE1 mode
• Lock setting area of I.CODE1 chip: "FDh page"
b7 b6 b5
!
Caution
The Lock function protects data from being erased due to unintentional
overwriting on the fixed data in the Tags.
For the lock setting in ISO mode, you can write-protect any given areas by the
page of Tag memory.
If you execute Write command on a write-protect page, a write processing
error will occur. You can make the lock setting by executing the Lock
command (LK) that enables access to the lock setting area.
For the details, see 5-4-9 "Lock Setting: ISO Mode."
There is a lock setting area in the system area of I.CODE1 chip, and you can
write-protect any given areas by page.
If you execute Write command on the write-protect page, the write processing
error will occur.
The lock setting consists of 12 bits of data in total, giving one bit to each page.
Lock setting can be made by using the Lock command (LK).
For the details, see 5-4-1 "Lock Setting: I.CODE1 Mode."
1 byte
b4 b3 b2 b1
Note •
You cannot cancel write-protect setting with the lock function of V720S
series.
•
Be aware that you cannot write data again to write-protect
•
UID (SNR): Tag-specific codes are write-protected by the factory setting.
Write-protect setting on the system area must be made with a great
care.
Lock Setting Area
b0 b7 b6
1 byte
b5 b4 b3
Section 3-3
b2 b1 b0
pages.
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