A switch matrix module () includes programmable stub breakers (--) which can break off the bus and isolate unused portion of the switch matrix. Using three-way stub breakers (--) at the matrix front-ends that can either completely isolate a middle matrix or cut off stubs left or right of the destination and source matrices, allows for the formation of very large matrices which have improved operational performance.
Circuit For Latching Data Signals From Dram Memory
Mark L. Smith - Laguna Beach CA Randy W. Raasch - Mission Viejo CA
Assignee:
Simple Technology, Inc. - Santa Ana CA
International Classification:
G11C 700
US Classification:
36518905
Abstract:
A circuit for latching data signals emanating from a DRAM memory for an extended period of time. The circuit is implemented on an ASIC chip which is positioned external to an FPM DRAM-type memory device. The circuit is organized to have a system transceiver, a memory transceiver, a data-in bus, a data-out bus, and control logic. The data-in bus is directly connected to a memory processor or controller through the system transceiver and the data-out bus is directly connected to the memory through the memory transceiver. The data-in bus is connected to the memory through a tri-state buffer positioned in the memory transceiver and the tri-state buffer is normally in an on position thereby normally connecting the data-in bus to the memory. The data-out bus is connected to the memory processor through a tri-state buffer which is normally in an off position. Hence, the circuit is normally configured to write data.
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