AT88SC0104CA/0204CA/0404CA/0808CA [Datasheet]

Atmel-8664F-CryptoMem-Low-Density-Full-Specification-Datasheet_022014

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2.

Description

memory with advanced built-in security and cryptographic features. The memory is divided into four or eight user zones each

of which may be individually set with different security access rights or used together to provide space for one or multiple data

files. A Configuration zone contains registers to define the security rights for each user zone and space for passwords and

Through dynamic, symmetric-mutual authentication, data encryption, and the use of encrypted checksums, CryptoMemory

provides a secure place for storage of sensitive information within a system. With its tamper protection circuits, this information

remains safe even under attack.

CryptoMemory also provides high security, low cost and ease of implementation of host-client type systems without the need

for a microprocessor operating system. The embedded cryptographic engine provides for a dynamic, symmetric-mutual

authentication between the device and host, as well as performs stream encryption for all data and passwords exchanged

between the device and host. Up to four unique key sets may be used for these operations.

2.1

Atmel AT88SCxxxxC Family of Products Differences

The key differentiating feature of the AT88SCxxxxCA family of memory devices from AT88SCxxxxC family is support for

hardware implementation of the TWI read command. Support for this TWI hardware command allows for faster application

development and also permits greater device versatility. In addition, AT88SCxxxxCA offers a Random Read command,

whereby given a starting address, the user can clock unlimited number of bytes from the device up to the memory capacity.

Last but not least, the AT88SCxxxxCA family of devices specifically targets low-voltage and low-power applications.

2.2

Embedded Applications

A 2-Wire serial interface running at 1MHz is used for fast and efficient communications with up to 15 devices that may be

individually addressed. CryptoMemory is available in industry standard 8-lead packages with the same familiar pin layout as

2-Wire Serial EEPROMs supporting only the synchronous communications protocol.

Note:

TSSOP pinout not the same.

2.3

Smart Card Applications

CryptoMemory offers the ability to communicate with virtually any smart card reader using the asynchronous T=0 protocol

defined in ISO 7816-3. All CryptoMemory devices in smart card module form will also communicate using a synchronous

2-Wire serial interface.

2.4

Scope

This CryptoMemory specification document includes all specifications for the standard, authentication, and encryption modes

of CryptoMemory operation.