Click to expand full text
IZ1991
CIRCUIT OF MULTIFUNCTIONAL ELECTRONIC KEY
WITH DATA PROTECTION
(functional equvivalent DS1991 «Maxim-Dallas Semiconductor»)
IZ1991 – circuit of multifunctional electronic key with data protection is perposed for autonomos identification in systems of access control, registration and identification of object.
Circuit performs following functions:
• One-time data writing in to ROM;
• Data storage and reading out of ROM;
• CRC-code (Cyclic Redundancy Check) generation ;
• Data transfer via 1-wire interface;
• Data and password storage for three independent keys.
IZ1991 Datasheet
