Secure microprocessor/microcomputer with secured memory

摘要: A digital processing device fabricated on a single semiconductor substrate includes an electrically programmable memory, random access central unit, all connected by information transfer bus. An external interface is provided to the bus provide contained devices. At least one security bit determine status of data stored in nonvolatile memory and portions memory. inhibit circuit interface. Address logic when or being accessed. The address also determines selected In addition, unit instruction operand fetched. operation fetched from