Device and designing method of multi system multiport storage

Abstract

A method for designing a multi-configuration multi-port memory device (IC) features that a memory module is divided into several memory banks, and several access control modules are used to access the memory module. Each access control module is composed of bank selector, address selector, configuration selector and data I / O controller.

Description

technical field [0001] The present invention relates to a device and design method for a multi-configuration multi-port memory, in particular to a method of dividing memory units into multiple block storage bodies (BANK) and cooperating with selective encapsulation, which has power-saving effect multi-configuration multi-port memory. Background technique [0002] Currently on the market, for the design of multi-configuration of memory (that is, by changing the number of memory addresses or the number of data port bits to form a variety of different memory space sizes), please refer to figure 1 The method shown is based on a 4K*16-bit memory cell (Memory cell) group as the basis for multi-configuration design, that is, each address corresponds to 16 bits (that is, 16 memory cells), and a total of 4K There are 4096 addresses, so the total number of storage units is 4096*16=65536, if it only corresponds to one storage element, then it is a 4K*16-bit storage element. [0003] ...

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Problems solved by technology

[0003] But usually in order to segment the market demand, and to cope with a small number of diverse needs, plus do not want to redesign each configured storage element, and make a set of photomasks for production (because if the sales volume is not large enough, then Because the mask and design costs are high, the average unit cost may become higher), so most of the current practices are to use existing memory elements and use selective wiring packaging to produce memory elements with different configurations. like Figure 2 to Figure 4 as shown figure 1 The storage element is used as the basis, and the storage elements of three different configurations are respectively changed into 4K*8 bits, 2K*16 bits and 2K*8 bits.

[0004] However, the above-mentioned storage elements are packaged through selective wiring to change the storage elements of different configurations. In actual use, there are obviously inconveniences and shortcomings, such as figure 2 The bit width of the middle data port only uses 8 bits, that is, only half of the number of all storage units can be used; image 3 Address A 11 It is not used, and only half of the total storage units are used; and Figure 4 The bit width of the middle data port is only 8 bits, address A 11 Then it is not used, that is, only 1 / 4 of the total storage units can be used, so that the use of such multi-configuration storage elements will cause waste of storage units, and because the entire storage unit group is not detailed Divided into smaller storage unit groups, that is, as long as there is an action on any one of the storage units, all control signals will be used, which is relatively easy to cause power consumption

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