Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method and apparatus for cascading content addressable memory devices










Image Number 10 for United States Patent #6148364.

A method and apparatus for cascading content addressable memory (CAM) devices is disclosed. The method and apparatus may be particularly useful when depth cascading CAM devices that operate in a flow-through mode. In the flow-through mode, a compare instruction may be simultaneously provided to each CAM device in the cascade, and the match address, data stored at the matched location, or other status information may then be output to a common output data bus by the highest priority matching CAM device in the same cycle that the instruction is provided to the CAM devices. Each CAM device may have a cascade input and a cascade output to perform the cascade function. The cascade output of a higher priority CAM device may be connected to the cascade input of the next lower priority CAM device. The higher priority CAM device may assert a cascade signal on its cascade output at a predetermined time after receiving an input signal (e.g., a clock signal). Asserting the cascade signal may indicate that the higher priority CAM device has completed the compare instruction. When the lower priority CAM device detects that the cascade signal has been asserted on its cascade input, the lower priority CAM device may sample the match flag of the higher priority CAM device to determine if the lower priority CAM device may output its data to the common output data bus.








 
 
  Recently Added Patents
Treatment of celiac disease with IgA
Reception circuit and signal reception method
Bath
Re-establishing push notification channels via user identifiers
Semiconductor device
Method and system for filtering noises in an image scanned by charged particles
Random access for wireless multiple-access communication systems
  Randomly Featured Patents
Etching apparatus using neutral beam
Method and system for desktop tagging of a web page
Systems, materials, and methods for a mechanical stress activated interface using piezo-optical components
Framework for lengthy Java Swing interacting tasks
Low profile keyboard keyswitch using a double scissor movement
Hepatitis C E1 and E2 polypeptides and methods of obtaining the same
Method for rapidly determining the acceptability of loads to be sterilized
Method and apparatus for distinguishing synthetic diamonds from natural diamonds
Refractory thermowell for continuous high temperature measurement of molten metal
System and method for controlling concrete production