at88sc018 ATMEL Corporation, at88sc018 Datasheet - Page 3

• Manufacturer Part Number: at88sc018
• Description: Cryptocompanion? Chip For Cryptomemory And Cryptorf
• Manufacturer: ATMEL Corporation

1.3.
1.4.
1.4.1. Pinout
5277C–CryptoCompanion–9/09
• Secure EEPROM storage for configuration information, etc. May permit reduction in the total BOM for the system.
• Easy to use – little programming required; no knowledge of security algorithms or protocols, fast time to market.
CryptoCompanion Security
The following is a partial list of the security features on this chip.
• Strong internal EEPROM encryption scheme
• Dynamically encrypted internal SRAM data.
• Programmable powerup penalty.
• Escalating Attack penalty.
• Authentication timeouts.
• Anti-tearing counters.
• Anti-tearing RNGSeed.
• Secure Personalization.
• Command usage limitations to prevent exhaustive attacks
• Uniquely encrypted F Secrets inside chip.
• High security Internal Clocking Scheme.
• Over and Under Voltage detection tampers.
• Internal Data integrity validation.
• Active shield over security sensitive blocks
Package, Pinout & IO
All pins not otherwise specified are considered Test pins and should be grounded on the board.
1.4.1.1. V
Power supply is 2.7 – 3.6V. Supply current less than 5 mA.
CryptoCompanion will be available to accept commands 60 ms after the later of V
driven high if CryptoCompanion is in a security delay then this interval is significantly longer.
During Power Up, V
level. During Power Down, V
below the 2.5V boundary. CryptoCompanion does not support hot swapping or hot plugging.
V
recommends two capacitors connected in parallel having a value of 1μF and 0.01μF. The capacitors should be
manufactured using X5R or X7R dielectric material. These capacitors should be connected to the AT88SC018 using a
total of no more than 1cm PC board traces. Atmel recommends the use of a ground plane and a trace length of less
than 0.5cm between the capacitors and the V
operation.
1.4.1.2. SDA
Two wire interface data pin, 5 V compatible. Data setup time = 0.1 μs minimum data hold time = 0 μs min. The system
board must include an external pull-up resistor.
CC
must be bypassed with high quality surface mount capacitors that are properly located on the board. Atmel
CC
, Gnd
CC
must exhibit a monotonic ramp at a minimum rate of 50 mV/mS until V
CC
must exhibit a monotonic ramp at a minimum rate of 50 mV/mS once it has dropped
CC
pin. Failure to follow these recommendations may result in improper
CryptoCompanion Chip
CC
rising above 2.7V or Reset being
CC
has crossed the 2.7V
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