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Active random access memory

專利號
US10867642B2
公開日期
2020-12-15
申請人
TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LIMITED(TW Hsinchu)
發(fā)明人
Hsin-Cheng Chen; Jung-Rung Jiang; Yen-Hao Huang
IPC分類
G11C7/10; G11C11/418; G06F12/00; G11C11/419; G06F12/02; G11C7/22
技術(shù)領(lǐng)域
write,read,ns,commands,clock,master,memory,command,circuitry,pattern
地域: Hsinchu

摘要

Systems and methods for processing commands at a random access memory. A series of commands are received to read data from the random access memory or to write data to the random access memory. The random access memory can process commands at a first rate when the series of commands matches a pattern, and at a second, slower, rate when the series of commands does not match the pattern. A determination is made as to whether the series of commands matches the pattern based on at least a current command and a prior command in the series of commands. A ready signal is asserted when said determining determines that the series of commands matches the pattern, where the random access memory is configured to receive and process commands faster than the second rate when the pattern is matched and the ready signal is asserted over a period of multiple commands.

說明書

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FIG. 1 is a diagram depicting a random access memory read path that includes pattern detection circuitry. The random access memory 100 (e.g., a static random access memory (SRAM)) includes read circuitry 102 and pattern matching circuitry 104 for identifying when read commands can be performed faster than a worst case time period. The read circuitry 102 includes a row decoder 106 and a column decoder 108 used to select a row and column of data to be read from the memory 100 based on an address inputted to the pattern detection circuitry 104 at 110. In the example of FIG. 1, a 12 bit address is provided to the memory 100 at point 110 to select a byte of memory to be read from the memory and outputted at 112. The 8 high order bits of that address are provided to the row decoder to select a row containing a word of interest from the storage cells 114 of the memory 100. The 4 low order bits are provided to the column detector 108 to select a byte from a selected row for output at 112 via multiplexer 116.

權(quán)利要求

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