Patent ID: 8959294
Filing Date: 2015-02-17
Classification: G11C

Abstract:
1. A storage device comprising: a control unit performing communication processing for communication with a host device connected to the storage device via a bus; a storage unit, data from the host device being written to the storage unit; a storage control unit controlling access to the storage unit, wherein an operation mode of the control unit is a first mode or a second mode, in the first mode, the control unit indicates the storage control unit to write data received from the host device to the storage unit when receiving a write command and the data from the host device, and the control unit returns an acknowledgment to the host device after the data is written to the storage unit, and in the second mode, the control unit indicates the storage control unit to write the received data to the storage unit when receiving the write command and the data from the host device, and the control unit does not return the acknowledgment to the host device; and a reset terminal, wherein the control unit determines whether the operation mode is the first operation mode or the second operation mode based on a voltage level of the reset terminal in an internal acknowledgment waiting period, the internal acknowledgment waiting period being a period of waiting for an internal acknowledgment from the storage control unit after reception of data packets.