| 摘要 |
PURPOSE: To provide a security memory card containing a microprocessor on one semiconductor chip and one or more nonvolatile addressable memory chips. CONSTITUTION: Both a microprocessor chip and a nonvolatile memory chip are connected to an internal card bus and addresses, data, and control information are transferred to the nonvolatile memory chip. A microprocessor 5-6 stores information containing many key values, configuration information peculiar to the use, and program instruction information. The memory of each chip is constituted in many blocks, namely, banks and each memory chip is constituted to contain a security control logic circuit. The circuits contain pluralities of nonvolatile and volatile storage devices which are loaded with keys and configuration information under the control of the microprocessor 5-6 only after the microprocessor 5-6 discriminates that a user successfully performs confirming procedures predecided by a host computer 5. Thereafter, the user is allow to read out information only from such a block as that defined by the configuration information. |
