Memory control method and memory control device

Abstract

A memory control method that carries out first-in first-out access control for a memory having a plurality of storage areas, including: selecting, as write positions, an address of a storage area in a storage block having at least one or more storage areas and an address of a storage area in any one of a plurality of redundant blocks that are made redundant with respect to the storage block and have at least one or more storage areas when the write positions are selected to write data to the memory; and selecting, as read positions, an address of a storage area of the storage block and an address selected by the selecting of the write position from among the addresses of a plurality of the redundant blocks when the read positions are selected to read data written by the writing of the data to the memory.

Description

technical field [0001] The present invention relates to access control of memory. Background technique [0002] FIFO (First In First Out) is a well known method of controlling RAM (Random Access Memory). Next, the FIFO access control to RAM will be described. Figure 8 FIFO access control is shown schematically. [0003] Such as Figure 8 As shown, according to the FIFO access control, initially, the first to tenth data items are written in the addresses 0 to 9 of the RAM in this order. Next, before the written data items are overwritten, the first to tenth data items are read. After that, the first to tenth data items are sequentially written. [0004] Next, the access timing of FIFO access control is described. Figure 9 The control timing of conventional RAM is shown. By the way, Figure 9 The interval of writing data to an address in the middle is 20 clocks. Also, reading data from each address takes one clock; data is read out successively. [0005] Such as Fi...

AI Technical Summary

Problems solved by technology

So the problem is that it is not possible to use triggers as triggers that hold values ​​for other operations

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