Patent ID: 8130492

Claim:
A multi-value semiconductor storage device comprising: a printed circuit board; a plurality of nonvolatile semiconductor memory chips that are mounted on the printed circuit board, each of the plurality of nonvolatile semiconductor memory chips being configured to be a multi-value type; a temperature sensor that is mounted on the printed circuit board to be adjacent to one of the plurality of nonvolatile semiconductor memory chips; a connector that is mounted on the printed circuit board, the connector being configured to be connectable with a host device; and a memory controller, that is mounted on the printed circuit board, controls access to data stored in the plurality of nonvolatile semiconductor memory chips based on a request from the host device, and the memory controller writes a temperature detected by the temperature sensor to the plurality of nonvolatile semiconductor memory chips, wherein the temperature sensor is mounted at a central area of the printed circuit board and disposed to be adjacent to one of sides of the memory controller and to one of sides of the one of the plurality of nonvolatile semiconductor memory chips.