Winbond Electronics Corporation

Tsachi Weiser

Nir Tasher

Uri Kaluzhny

Valery Teper

A method in a memory device that operates in a testing mode, includes receiving a vector to be written to the memory device. The vector is written to the memory device only if the vector belongs to a predefined set of test vectors. If the vector does not belong to the set of test vectors, the vector is converted to one of the test vectors, and the converted vector is written to the memory device.

Memory device with secure test mode

An apparatus for detecting tampering with a clock of a state-machine, comprising, a master state-machine having master states and driven by a master clock, the master states being switchable responsive to events, and an auxiliary state-machine having auxiliary states and driven by an auxiliary clock synchronous with the master clock, the auxiliary states being switchable responsive to a signal generated based at least on said events, consequently establishing a correspondence between the master states and the auxiliary states, thus ensuing that subsequent to tampering with the master clock the correspondence between the master states and the auxiliary states become discordant, thereby indicating that the master clock has been tampered with.

Growing community of inventors

Even Yehuda, Israel

Tsachi Weiser