Specifications

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5. THINGS YOU NEED TO KNOW BEFORE PROGRAMMING

5.3 Write Protect Function

The write protect function is provided to ensure that important data, such as the

product models and types stored in an ID tag, do not get lost by careless writing.

After important data are written, it is recommended that you write protect the data using

the method described below.

The RFID interface module is provided with a write protect function for enabling/

disabling ID tag write protection.

5.3.1 How to set write protect

Set the write protect range in the four bytes of addresses 0000

H to 0003H of the ID tag.

Specify the enable/disable setting for using the write protect function using the most

significant bit of the ID tag address 0000

Table 5.8 Write Protect Setting Method

Address

Bit

7 6 5 4 3 2 1 0

0000H

Enable

/Disable

Upper two digits of start address (00H to 7FH)

0001H Lower two digits of start address (00H to FFH)

0002H Upper two digits of end address (00H to FFH)

0003H Lower two digits of end address (00H to FFH)

(1) Write protect function enable/disable setting (bit 7 of address 0000

0 (OFF): Disable (Do not write protect)

1 (ON): Enable (Write protect)

(2) Write protect range setting (address 0000H to address 0003

Start address: 0000H to 7FFF

End address: 0000H to FFFF