The DS28E01P-100+ is a 1kB protected 1-Wire EEPROM with SHA-1 engine. The DS28E01-100 combines 1024 bits of EEPROM with challenge-and-response authentication security implemented with the ISO/IEC 10118-3 secure hash algorithm (SHA-1). The 1024-bit EEPROM array is configured as four pages of 256 bits with a 64-bit scratchpad to perform write operations. All memory pages can be write protected and one page can be put in EPROM-emulation mode, where bits can only be changed from a 1 to a 0 state. Each DS28E01-100 has its own guaranteed unique 64-bit ROM registration number that is factory lasered into the chip. The DS28E01-100 communicates over the single-contact 1-Wire® bus. The communication follows the standard 1-Wire protocol with the registration number acting as the node address in the case of a multidevice 1-Wire network.
On-chip 512-bit SHA-1 engine to compute 160-bit MAC and to generate secrets
User-programmable page write protection for page 0, page 3 or all four pages together
User-programmable OTP EPROM emulation mode for page 1 (write to 0)
Communicates to host with a single digital signal at 15.3 or 90.9kbps using 1-wire protocol
Switch point hysteresis and filtering to optimize performance in the presence of noise
