SLE 4442 Chip PVC Smart Card Blank  PVC Card IC Cards hotel card  ISO7816 Smart Card

256 bytes EEPROM mode

32-bit protected memory

Bytes 3 user password, the password error count: 3

Temperature: 0 c-70 c

At least 100,000 erase/write

At least 10 years of data retention

Minimum write/erase time: 2.5ms

Operating voltage: 5V

Maximum power supply current: 10mA

Factory has been cured when the user code is 32-byte write-protected data area

Second, allocate storage

00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F

92 23 10 01 46 0b 81 15 ff ff ff ff ff ff ff ff

ff ff ff ff ff 6d 77 36 36 33 00 ff ff ff ff ff

ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff

ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff

ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff

ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff

Data area

ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff

ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff

ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff

ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff

ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff

ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff

Three, secret features:

1, write protected area (the first 32 bytes) each byte can be individually write protected write protection, content cannot be changed (that is, curing data)

2, password, check the correct before, all data can be read, if necessary, can encrypt the data into the appropriate.

3, check the password is correct you can write or modify.

And 4 bytes of the user’s password, check the correct itself after changes, effective from the card down so far.

5, password error counter, the initial value is 3, password checking error 1, subtract 1, and if the counter value is 0, then the card is automatically locked, data can only be read, not change password checks can no longer, if not zero, there is a password check the correct can be restored to their original values.

Byte address 6, 0-5, 6-7, has been written by the manufacturer before delivery and cannot be changed.

Four, pay attention

Password address, is not in the 0-256 bytes.