Resources Contact Us Home
Method and apparatus for cascading content addressable memory devices

Image Number 3 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
System and method for creating a build set and bill of materials from a master source model
Process for production of nickel oxide-stabilized zirconia composite oxide
Voltage regulator with improved voltage regulator response and reduced voltage drop
Systems and methods for adaptive blind mode equalization
Image forming apparatus and control method therefor
Photon density wave based determination of physiological blood parameters
Domestic soda-water preparing device
  Randomly Featured Patents
Method for controlling appliances by swing motion
Actuated atomizer
Rescue device for bee attacks
Method of driving liquid crystal display device, liquid crystal display device,and electronic apparatus
Firearm clip carrier
Compounds and methods of use
Shaft for lacrosse stick
Water-escape device for freeze-prone water conduit
Maleic and phthalic diamides
Apparatus and methods for transmission security in a computer network