Invention Grant
- Patent Title: Boundary independent bit decode for a SDRAM
- Patent Title (中): 用于SDRAM的边界独立位解码
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Application No.: US572604Application Date: 1995-12-14
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Publication No.: US5663924APublication Date: 1997-09-02
- Inventor: John Edward Barth, Jr. , Howard Leo Kalter
- Applicant: John Edward Barth, Jr. , Howard Leo Kalter
- Applicant Address: NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: NY Armonk
- Main IPC: G11C7/10
- IPC: G11C7/10 ; G11C8/00
Abstract:
A boundary independent decoder for a Synchronous Dynamic Random Access Memory (SDRAM) with an n bit burst transfer block length. A user, usually a processor or microprocessor requests access to a block of SDRAM memory. The requested block may begin between array decode boundaries. A column address is decoded by an SDRAM column decoder. The decoder selects a starting boundary for 2n bits. The first requested bit is in the first n bits of the 2n selected bits. Thus, the entire n bit block is included in the selected 2n bit block. The n bit block is selected from the selected 2n bits and latched in a high speed decoder/register in a sequentially scrambled order, i.e., the i.sup.th bit is the first requested bit and the requested bit order is i, . . . , (n-1), . . . , 0, . . . , (i-1). Latched data is scrambled either sequentially or interleaved, if required. Scrambled data is burst transferred off chip.
Public/Granted literature
- US5004631A Surface treatment with sulfonate ester polymer Public/Granted day:1991-04-02
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