Patent ID: 7708195

Claim:
A memory card comprising: a rewritable, nonvolatile memory; a plurality of external interface terminals capable of receiving a first command for a security processing and a second command with data for accessing the rewritable nonvolatile memory; an interface controller coupled to the plurality of external interface terminals and including: a first buffer to store the first command, a second buffer to store the data relating to the second command, and a microcomputer to execute the second command so as to access the rewritable nonvolatile memory based on the second command; and a data processor connected to said for a security processing coupled to the interface controller and including: a CPU to execute the first command so as to execute a security processing based on the first command, wherein the interface controller inputs the first command supplied from an outside of the memory card to the first buffer, after the completion of the input of the first command to the first buffer, transfers the first command to the CPU in the data processor, and, while causing a process based on the first command to be performed in the CPU in the data processor, allows data corresponding to the second command supplied from the outside of the memory card and related to access to the nonvolatile memory to be input to the second buffer.