Kabushiki Kaisha Toshiba

Hiroko Okabayashi

Tetsuya Kaise

Noriaki Emura

Akio Yazawa

Takashi Ogo

Katsushi Naito

Provided is a semiconductor storage device having a first interface section meeting a USB standard for connection to host equipment, a NAND memory section that is a first semiconductor memory section, a second interface section to which small memory cards can be connected, each small memory card having a second semiconductor memory section, and a controller capable of controlling the NAND memory section and the second semiconductor memory sections by one linear address.

Semiconductor storage device

A semiconductor memory device comprises an input unit inputting an address and data; a storage unit storing data and a FAT; an address conversion unit converting the address; an access unit accessing the storage unit according to the converted address; a detection unit detecting a format of the FAT; and an alteration unit altering conversion rules in the address conversion unit according to the detection.

Semiconductor memory device and operation method thereof

A USB memory includes: a USB terminal unit, a main unit which incorporates therein a NAND memory and a processor module; and a rotation portion which changes a relative position between the main unit and the USB terminal unit. The processor module switches an access management mode to a first access management mode or a second access management mode depending on the relative position between the main unit and the USB terminal unit. The processor module manages data stored in the NAND memory such that data having been stored under the first access management mode is rendered inaccessible to the host device with the second access management mode and that data having been stored under the second access management mode is rendered inaccessible to the host device with the first access management mode.

Semiconductor memory device and method of controlling semiconductor memory device

A host device exchanging information with a memory card, the host device including: a charge management module configured to receive payment of a charge corresponding to an increased amount of a usable area if a capacity of the usable area of the memory card for saving user data is increased, and pay out a charge corresponding to the reduced amount of the usable area if the capacity of the usable area is reduced; and a transmission module configured to transmit an area changing command to instruct an increase or a reduction of the usable area in accordance with the charge to the memory card.

Growing community of inventors

Tokyo, Japan

Hiroko Okabayashi