1. Protection codes and Comparison J.-D. Chatelain LF - EN

2. Reading a protected word without login
LF - EN
Protection codes and Comparison
Reading a protected word without login
Mask protected region
Setting the « Mask protected region » bit
Write protection
Read protection
TAG not logged in
Its equivalent in HEX
Result of a reading
A memory word in binary

3. Reading a protected word with login
LF - EN
Protection codes and Comparison
Reading a protected word with login
When words are protected using a password, you may only access them with a login.
When words are protected by “Read protection bits” you may only compare them with other data.
TAG logged in
Mask protected region
Write protection
Read protection
Result of a reading

4. Result of reading transponder addresses 20 through to 24
LF - EN
Protection codes and Comparison
Result of reading transponder addresses 20 through to 24
Result of reading the same addresses after having protected addresses 21 and 22

5. The acknowledgment (error) code "4" after the second phase indicates that the entered data is not identical to the data stored in the memory.
Complete words have to be compared!
The acknowledgment (error) code "0“, after the second phase, indicates that the entered data is identical to the data stored in the memory
Content of the memory of the transponder

6. Protection codes and Comparison End of this chapter J.-D. Chatelain
LF - EN
Protection codes and Comparison
Protection codes
and Comparison
End of this chapter
J.-D. Chatelain