Semiconductor device, nonvolatile semiconductor memory, system including a plurality of semiconductor devices or nonvolatile semiconductor memories, electric card including semiconductor device or nonvolatile semiconductor memory, and electric device with which this electric card can be used

Abstract

The object is to avoid an erroneous operation during a term in which an initialization is performed when a command is input. After a power source is turned on, a low level of a power-on-reset signal PWONRSTn is output until it reaches a power-on detect level. It is inverted by an inverter IN, and input to a NOR circuit NRlikewise commandsand, so that a status is set to a busy status. The busy status is kept during a term in which a initialization operation is performed until the power supply voltage reaches the power-on detect level. Further, the status is read out to the exterior by a status read out mode signal to notify a user. As a result, it prevents from being input a command by an erroneous operation of a user during the initialization operation term.