Patent ID: 8464020

Claim:
A nonvolatile memory device that transmits and receives data to and from a host device, the nonvolatile memory device comprising: one or more nonvolatile memories; and a controller unit configured to control reading and/or writing of data to and from the nonvolatile memories, wherein the controller unit includes a host interface unit and a memory control unit configured to read a boot code of the host device from the nonvolatile memories, and (1) when receiving, from the host device, an interface activating signal that is a signal carrying an instruction to activate an interface, the host interface unit transmits an interface activating signal that is identical to the received interface activating signal to the host device, (2) when receiving, from the host device, a first symbol carrying an instruction to read the boot code after transmitting the interface activating signal to the host device, the host interface unit transmits a first symbol that is identical to the received first symbol to the host device, and (3) after transmitting the first symbol to the host device, the host interface unit outputs the boot code that is read by the memory control unit to the host device.