Semiconductor integrated circuit device

Details Semiconductor integrated circuit device Semiconductor integrated circuit device

2006-07-11

2006-07-11

Dinh, Paul (Department: 2825)

Computer-aided design and analysis of circuits and semiconductor

Nanotechnology related integrated circuit design

C716S030000, C716S030000, C711S100000

Reexamination Certificate

active

07076745

ABSTRACT:
The present invention provides a semiconductor integrated circuit device easy to design timing to be provided with respect to an external memory. In the semiconductor integrated circuit device (10), a second memory controller (16) is provided outside a hard macro (12) containing a first memory controller (15). The length of a wiring (second wiring) between the second memory controller (16) and an IO pad unit (13) is set shorter than the length of a wiring (first wiring) between the first memory controller (15) and the IO pad unit (13). Further, a wiring (40) is provided which transmits a switch signal for exclusively switching the states of the first memory controller (15) and the second memory controller (16) to either one of valid and invalid states.

REFERENCES:
patent: 6226724 (2001-05-01), Biggs
patent: 6275914 (2001-08-01), Jeddeloh
patent: 6292903 (2001-09-01), Coteus et al.
patent: 6434034 (2002-08-01), Wallace et al.
patent: 6957399 (2005-10-01), Emberling et al.
patent: 2002/0087821 (2002-07-01), Saulsbury et al.
patent: 2004/0107324 (2004-06-01), Nystuen
patent: 2001-168201 (2001-06-01), None

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