AT88SC0104CA-PU Atmel, AT88SC0104CA-PU Datasheet - Page 13

• Manufacturer Part Number: AT88SC0104CA-PU
• Description: IC EEPROM 1KBIT 4MHZ 8DIP
• Manufacturer: Atmel
• Series: CryptoMemory®r

Specifications of AT88SC0104CA-PU

• Format - Memory: EEPROMs - Serial
• Memory Type: EEPROM
• Memory Size: 1K (128 x 8)
• Speed: 4MHz
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• For Use With: AT88SC-SDK1 - KIT TUEMA DK CRYPTOMEM SMARTCARDAT88SC-DK1 - KIT DEV FOR AT88SCXXXXC FAMILY
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

12.3.
12.4.
5200ES–CRYPT–08/09
Password Verification
Passwords may be used to protect READ and/or WRITE access of any user zone. When a valid password is
presented, it is memorized and active until power is turned off, unless a new password is presented or RST becomes
active. There are eight password sets that may be used to protect any user zone. Only one password is active at a
time.
Presenting the correct WRITE password also grants READ access privileges.
Authentication Protocol
The access to a user zone may be protected by an authentication protocol. Any one of four keys may be selected to
use with a user zone.
Authentication success is memorized and active as long as the chip is powered, unless a new authentication is
initialized or RST becomes active. If the new authentication request is not validated, the card loses its previous
authentication which must be presented again to gain access. Only the latest request is memorized.
Figure 12.
Note:
COMPUTE Challenge B
Authentication and password verification may be attempted at any time and in any order. Exceeding
corresponding authentication or password attempts trial limit renders subsequent authentication or password
verification attempts futile.
Device (Card)
Password and Authentication Operations
Checksum (CS)
VERIFY WPW
VERIFY RPW
Card Number
Challenge B
VERIFY CS
Write DATA
VERIFY A
DATA
AUTHENTICATION
WRITE ACCESS
READ ACCESS
COMPUTE Challenge A
Challenge A
VERIFY B
Read Password (RPW)
VERIFY CS
Write Password (WPW)
DATA
CS
Host (Reader)
AT88SC0104CA
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