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










Image Number 4 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
Disk drive to enable defect margining
Image forming apparatus and method
Method and system for modifying satellite radio program subscriptions in a mobile vehicle
Cross-linkable compositions
Xylitol-based anti-mucosal compositions and related methods and compositions
Semiconductor device and method of manufacturing the same
Pharmaceutical dosage form
  Randomly Featured Patents
Submerged electric motor
Inductive system for measuring the length of a shock absorber
Paper product with embossed surface pattern
Seat slide rail device
Interconnecting substrates for electrical coupling of microelectronic components
Operator interface controllable brake with field responsive material
Silver halide color photographic light-sensitive material
Utilization of unused disk space on networked computer
Pusher assembly and method of assembling a pusher assembly
Thermosetting highly foaming sealer and method of using it