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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

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

FIGS. 5A and 5B are flow diagrams depicting an processes for controlling a ready signal of a memory. FIGS. 5A and 5B are described with reference to FIG. 1 for context, but the methods are applicable to other structures as well. In the example of FIG. 5A, at 502 a master device issues a read command to the memory received at 110. At 504, a determination is made by pattern detection circuitry 104 as to whether the current read operation will be a fast operation (e.g., the word that is to be read from is already present in the multiplexer). If so, then the ready signal is asserted at 506 (e.g., by pulling up the shready signal at 120), the SRAM read circuitry 102 outputs data, and a next read command can be received at 110, as indicated back at 502. If not, the ready signal is deasserted at 508 (e.g., by pulling down the shready signal at 120) for one or more clock cycles, as indicated at 510.

權(quán)利要求

1
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