Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Apparatus and method for evaluating an activity distribution, and irradiation system
High damage threshold frequency conversion system
360-degree angle decoder
Reception method and reception apparatus
Electronic device with embedded antenna
Server-side connection resource pooling
Escalating data backup protection in response to a failure in a cluster of nodes
  Randomly Featured Patents
Timing system and device and method for making the same
Apparatus for blood oxygenation
Method for the preparation of 2,6-naphthalene dicarboxylic acid
Socket for a wrench
Apparatus for and method of delivering visual image into air
Method of forming nitride sidewalls having spacer feet in a locos process
Simulcrypt key sharing with hashed keys
Vial and cap assembly having means for sealing a tube projecting beyond the vial reservoir
RFID system and method including tag ID compression
Using polyamide nucleic acid oligomers to engender a biological response