Static information storage and retrieval – Addressing – Multiple port access
Reexamination Certificate
2007-03-27
2007-03-27
Mai, Son L. (Department: 2827)
Static information storage and retrieval
Addressing
Multiple port access
C365S189040, C365S189080
Reexamination Certificate
active
11251682
ABSTRACT:
In one embodiment of the invention, a block of configuration memory has rows of memory cells, at least one row having a set of one or more dual-port memory cells adapted to selectively store either configuration data or local data. The configuration address line for that row is segmented such that the address line is connected to the configuration address ports of the dual-port memory cells via access control circuitry that can be programmably configured to prevent access to those memory cells via the configuration address line. The access control circuitry enables local data to be efficiently and accurately stored in the dual-port memory cells without interference from configuration readback operations during normal operation or from partial reconfiguration of the configuration memory.
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Fenstermaker Larry R.
Scholz Harold N.
Wijesuriya Sajitha
Lattice Semiconductor Corporation
Mai Son L.
Mendelsohn Steve
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