Static information storage and retrieval – Systems using particular element – Flip-flop
Reexamination Certificate
2007-12-04
2007-12-04
Le, Thong Q. (Department: 2827)
Static information storage and retrieval
Systems using particular element
Flip-flop
C365S210130, C365S189040
Reexamination Certificate
active
10567688
ABSTRACT:
In a semiconductor integrated circuit having a register file of a multiport configuration, a first holding circuit20A is dedicated to a first functional block having one first write port section21AW and two first read port sections21AR1and21AR2. A second holding circuit30B is dedicated to a second functional block having one second write port section31AW and one second read port section31BR. When it is necessary to read data held in the first holding circuit20A from the second read port section31BR, for example, a data interchange operation is performed as follows. After the data of the second holding circuit30B is latched in a latch circuit40, the data of the first holding circuit20A is transferred to the second holding circuit30B, and then the data of the second holding circuit30B latched in the latch circuit40is transferred to the first holding circuit20A. Thus, the area necessary to provide a register file is significantly reduced.
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Nose et al., “Optimization of V00and VTHfor Low-Power and High-Speed Applications”, ASPDAC.00, pp. 469-474, Jan. 2000.
Le Thong Q.
Matsushita Electric - Industrial Co., Ltd.
McDermott Will & Emery LLP
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