Invention Grant
- Patent Title: TCAM with efficient range search capability
- Patent Title (中): TCAM具有高效的搜索能力
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Application No.: US14205780Application Date: 2014-03-12
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Publication No.: US09087585B2Publication Date: 2015-07-21
- Inventor: Patrick W. Bosshart
- Applicant: Texas Instruments Incorporated
- Applicant Address: US TX Dallas
- Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee Address: US TX Dallas
- Agent John R. Pessetto; Charles A. Brill; Frank D. Cimino
- Main IPC: G11C15/00
- IPC: G11C15/00 ; G11C15/04

Abstract:
An embodiment of the invention includes a ternary content addressable memory (TCAM) that has input search data bits, TCAM words and range search input data bits. Each TCAM word is operable to store a match pattern and provide a match output. The match output indicates a match when the match pattern of the TCAM word matches the TCAM input search data bits. The range search input data bits are separated into groups. Each group has a bit width N where N is the number of range search input data bits. For the match pattern in each group, there is a Boolean function that uses the N range of search input data bits. (2N)/2 TCAM bits are provided for each TCAM word. 2N internal TCAM search lines are operable to search the (2N)/2 TCAM bits. Decoder logic is associated with each group that decodes the N range search input data bits.
Public/Granted literature
- US20140268971A1 TCAM WITH EFFICIENT RANGE SEARCH CAPABILITY Public/Granted day:2014-09-18
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