DS2465

ABRIDGED DATA SHEET DS2465 DeepCover Secure Authenticator with SHA-256 Coprocessor and 1-Wire Master Function General Description DeepCover® embedded security solutions cloak sensitive data under multiple layers of advanced physical security to provide the most secure key storage possible. The DeepCover Secure Authenticator (DS2465) is a SHA-256 coprocessor with built-in 1-Wire® master that provides the SHA-256 and memory functionality required by a host system to communicate with and operate a 1-Wire SHA-256 slave. In addition, it performs protocol conversion between the I2C master and any attached 1-Wire SHA-256 slaves. For 1-Wire line driving, internal user-adjustable timers relieve the system host processor from generating time-critical 1-Wire waveforms, supporting both standard and overdrive 1-Wire communication speeds. The 1-Wire line can be powered down under software control. Strong pullup features support 1-Wire power delivery to 1-Wire devices such as EEPROMs. When not in use, the DS2465 can be put in sleep mode where power consumption is minimal. Ordering Information appears at end of data sheet. Features S SHA-256 Engine to Operate a Symmetric-KeyBased Bidirectional Secure Authentication Model S Two 32-Byte Pages of User EEPROM with Multiple Programmable Protection Options S 1-Wire Master Port with Selectable Active or Passive 1-Wire Pullup S Strong 1-Wire Pullup Provided by an Internal LowImpedance Signal Path S 1-Wire Port Can Be Powered Down Under Software C...