Patent ID: 6751716
Filing Date: 2004-06-15
Classification: G06F,G11C

Abstract:
A semiconductor storage device, comprising:a memory having a memory space, a plurality of addressee of the memory space each having data stored therein; and a security circuit for controlling a security function which activates or deactivates at least a part of the memory space according to whether, in the case where an address of the memory space input to the security circuit matches at least one key-address included in the security circuit, data stored in the address in the memory space is manipulated under a condition equal to a predetermined condition or under a condition not equal to the predetermined condition, wherein a plurality of addresses are input to the security circuit, the security circuit including a plurality of key-addresses set in a predetermined order, and the predetermined condition is that the predetermined order of the key-addresses is equal to an order of manipulation for data stored in addresses among the plurality of addresses which match the key-addresses.