Semiconductor device, nonvolatile semiconductor memory,...

Details Semiconductor device, nonvolatile semiconductor memory,... Semiconductor device, nonvolatile semiconductor memory,...

2006-09-15

2008-05-13

Le, Vu A. (Department: 2824)

Static information storage and retrieval

Powering

C365S228000

Reexamination Certificate

active

07372761

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 IN11, and input to a NOR circuit NR11likewise commands1and2, 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.

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