Toshiba Memory Corporation

Kabushiki Kaisha Toshiba

Shinji Honjo

Koichi Nagai

Isao Ozawa

Katsuya Murakami

Akira Tanimoto

Satoru Fukuchi

Akihisa Fujimoto

Hiroyuki Sakamoto

An expansion device includes a clock swing detecting unit, a command receiving unit, and a response generating unit. The clock swing detecting unit detects a clock swing set based on a second signal voltage lower than a first signal voltage before the start of initialization. The command receiving unit receives a command having a parameter incorporated that can indicate which signal voltage of the first signal voltage and second signal voltage is being used. The response generating unit responds to the command based on the clock swing.

Host apparatus and expansion device adaptable to low voltage signaling

According to one embodiment, a data storage device includes a controller driven by a first power supply voltage, a nonvolatile memory controlled by the controller and driven by a second power supply voltage, and a switch element determining whether the second power supply voltage is applied to the nonvolatile memory. The controller is configured to turn off the switch element in a first mode and turn on the switch element in a second mode.

Data storage device with nonvolatile memory

Data storage device including nonvolatile memory in which on/off state of power source voltage is controlled

Growing community of inventors

Tokyo, Japan

Shinji Honjo