AT88SC1608-09ET-00 Atmel, AT88SC1608-09ET-00 Datasheet - Page 8

• Manufacturer Part Number: AT88SC1608-09ET-00
• Description: IC EEPROM 16KBIT 1MHZ M2E
• Manufacturer: Atmel
• Series: CryptoMemory®r

Specifications of AT88SC1608-09ET-00

• Format - Memory: EEPROMs - Serial
• Memory Type: EEPROM
• Memory Size: 16K (2K x 8)
• Speed: 1MHz
• Interface: Serial
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: M2 E, Smart Card Module
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7.2
7.3
7.4
7.5
8. User Zones
9. Security Operations
9.1
9.2
8
Cryptogram (Ci)
Secret Seed (Gc)
Memory Test Zone
Password Sets
Password Verification
Authentication Protocol
AT88SC1608
The 64-bit cryptogram is generated by the internal random generator and modified after each
successful verification of the cryptogram by the chip, on host request. The initial value, defined
by the issuer, is diversified as a function of the identification number.
The 64-bit secret seed, defined by the issuer, is diversified as a function of the identification
number.
The memory test zone is a 64-bit free access zone for memory test.
The password sets are eight sets of two 24-bit passwords for read and write operations, defined
by the issuer. The write password allows the user to modify the read and write passwords of the
same set. By default, the eighth set of passwords (Write 7/Read 7) is active for all user zones.
•
A 24-bit password, defined by Atmel, that is different for each card manufacturer. The Write
Password 7 is used as the secure code until the personalization is over (PER = 0).
•
There are 16 8-bit password attempts counters (PACs), one for each password, and one other
8-bit attempts counter for the authentication protocol (AAC). The attempts counters limit the
number of consecutive incorrect code presentations allowed (currently eight).
These zones are dedicated to user data. The access rights of each zone are programmable sep-
arately via the access registers. If several zones share the same password set, the set will be
entered only once (after the part is powered up). Therefore, several zones can be combined into
one larger zone. The user zone address should be changed each time a new zone is being
reached.
Compare the operation password presented with the stored one and write a new bit in the corre-
sponding attempts counter for each wrong attempt. A valid attempt before the limit erases the
attempts counter, and allows the operation to be carried out as long as the chip is powered.
Only one password is active at a time. When a new password is presented, access privileges
defined by the previous password become invalid.
If the trials limit has been reached (i.e., the 8 bits of the attempts counter have been written), the
password verification process will not be taken into account.
The access to a user zone may be protected by an authentication protocol in addition to pass-
word-dependent rights.
Secure Code
Attempts Counters
0971H–SMEM–6/08