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










Image Number 11 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
Automatic portable electronic device configuration
Providing multiple decode options for a system-on-chip (SoC) fabric
Device for installing conducting components in structures
Electronic product design
Mobile device mode control based on dual mapping of availability (presence) information
Markers of acute myeloid leukemia stem cells
Delay interferometer using magneto-optic effect of a variable faraday rotator
  Randomly Featured Patents
Mechanical pressure gauge having digital output
Expandable surface mount box for transmission line connectors
Sheet justifier
Transfer apparatus
Apparatus for the distillation and rectification of mixtures
Disk array device and method of supplying power to disk array device
Low-power transceiver architectures for programmable logic integrated circuit devices
Absorbent articles with refastenable side seams and intuitive disposal feature
Surgical implement detector utilizing capacitive coupling
Exposure apparatus and method for producing device