Patent ID: 7847595
Filing Date: 2010-12-07
Classification: G11C,H03K,H03M

Abstract:
1. An input circuit for delivering N pieces of plural-bit signals each comprised of a signal of a plurality of bits, based on input data, said input circuit comprising: N pieces of control signal preservation/output circuits, which are provided one by one corresponding to the plural-bit signals, for delivering the input data as it is when a trigger signal to said control signal preservation/output circuits is at a first level, and holding the previously delivered output data when the trigger signal to said control signal preservation/output circuits is at a second level different from the first level, thereby enabling switching and preservation of the plural-bit signals; and a controlled circuit selector circuit for setting the trigger signal for S pieces of said control signal preservation/output circuits to the first level, and setting the trigger signal for the rest (N-S) pieces of the control signal preservation/output circuits to the second level, wherein a group of input signals are supplied in common to said N pieces of the control signal preservation/output circuits, corresponding to the input data, and wherein said each control signal preservation/output circuit comprises: