Optimization of ROM structure by splitting

Details Optimization of ROM structure by splitting Optimization of ROM structure by splitting

2007-01-15

2009-08-18

Whitmore, Stacy A (Department: 2825)

Static information storage and retrieval

Read only systems

C365S230010, C365S189011, C711S170000, C711S171000, C711S102000

Reexamination Certificate

active

07577011

ABSTRACT:
A method for designing a read-only memory (ROM), and related device, includes partitioning a dataset into two or more sub-datasets that each have the same address space, but are of a smaller bit-width than the original dataset. The sub-datasets are row collapsed, and then respective memory cells for the sub-datasets are provided. The output of the memory cells provides the output of the ROM. Each memory cell includes a decoder that maps addresses to word lines based on mapping information obtained during row collapsing, and a logic array driven by the decoder that encodes the data words of the sub-dataset.

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patent: 7106651 (2006-09-01), Nagai et al.
patent: 7246198 (2007-07-01), Nataraj et al.
patent: 2005/0105380 (2005-05-01), Takahashi et al.

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