1
Ken Fernald: Embedded microprocessor multi-level security system in flash memory. Cygnal Integrated Products, Gregory M Howison, Howison & Arnott, September 2, 2003: US06615324 (37 worldwide citation)

An embedded microprocessor two level security system in flash memory. The memory includes an address input and a memory space of addressable locations having a restricted area and a user area. Addressing one of a the addressable locations therein results in the output of information therefrom in res ...


2
Ken Fernald: Method and apparatus for protecting internal memory from external access. Silicon Labs CP, Howison & Arnott L, October 16, 2007: US07284106 (19 worldwide citation)

Method and apparatus for protecting internal memory from external access. A method for protecting a memory space from external access is provided. A plurality of lock bits are stored in a location in memory, each associated with a separate logical portion of the memory space and determinative as to ...


3
Ken Fernald: Method and apparatus for protecting internal memory from external access. Silicon Labs Cp, Mary Specht, May 29, 2008: US20080126728-A1

Method and apparatus for protecting internal memory from external access. A method for protecting a memory space from external access is provided. A plurality of lock bits are stored in a location in memory, each associated with a separate logical portion of the memory space and determinative as to ...