Abstract: A N-level cell memory controlled by the memory controller of the invention have an internal configuration in which the plurality of data input/output terminals connected to the second data bus are separated into first through Mth data input/output terminal groups, such that there is no redundancy in the n bits of data associated with one N-level cell. Together with this, the memory controller separates the plurality of data bits on the first data bus into first through Mth data groups, the ECC circuits generate error-correction codes for each of these data groups, and the first through Mth data groups and first through Mth error correction codes are input to the first through Mth data input/output terminals of the N-level cell memory, via the second data bus.

Abstract: The invention provides a waterproof switch which can electrically open and close an door of a vehicle body by a switch, can achieve a seal between a waterproof switch and a panel and a seal against an inner portion of the waterproof switch by one seal member, and previously make a seal member hold in a side of the waterproof switch at a time of assembling.

Abstract: There is provided a control circuit which can perform a control of opening and closing an opening/closing device, a sun roof in a vehicle, or the like. Usually, an I UP direction current is supplied to a motor 9 according to an ON-operation by an UP switch 3, and an I DOWN direction current is supplied to a motor 9 according to an ON-operation by a DOWN switch 5. If any failures occur, even if the I UP direction current is supplied to the motor 9 when the UP switch 3 is not on-operated, in accordance with the ON-operation of the DOWN switch 5, the current is switched over to the I DOWN direction, and then, is supplied to the motor 9.