FM4428 Contact IC Card

 1.     Main index:

1)    EMPROM of 1024 bytes

2)    Written protection area of1024 bytes

3)    Password of 2 byte,miscalculate 8 times

4)    Temperature: -35℃~80℃

5)    At least 100,000 rewritable times

6)    At least 10 years data storage

2.     Function description:

1)    Memory of SLE4428 is1Kbytes, space 0~1023

2)    Besides password, all thedata can be read under any circumstances, password can be read after beingproved.

3)    All the data includingpassword can be written or changed after being proved.

4)    All the data can be writeprotected according to byte, data solidification after write protect, cannot bechanged under any circumstances.

5)    There’s an incorrect passwordcalculator. The address is 1021, initial value is 8, 1 will be less if thepassword is proved wrong for 1 time. If the value of calculator is 0, the cardwill be locked, which means the data can be read only, cannot be written,changed or continue to prove the password; if it is not 0, it can go back toinitial value as long as the password is proved right just for once.

6)    The length of the passwordis 2bytes, the addresses are 1022, 1023. There are 216 combinations, it will be00 and cannot be written and changed if the addresses are read before passwordis proved, after it’s proved, it can be read and changed, and it will be validuntil the battery is out.

7)    The only code. The address21-26 is the code of the card, which is the global unique code for user thatcan maximum guarantee the interests of user, it cannot be written or changedafter it’s solidified written.

8)    Address 0-7, 21-26 have beensolidifiedby manufacturer before release, cannot be changed.