Synchronous dynamic memory using method

Abstract

The invention discloses a Synchronous Dynamic Random Access Memory (SDRAM) using method comprising the following steps: connecting a memory apparatus and a decoding chip; judging whether the memory apparatus connected to the decoding chip is the SDRAM with 2M*32 bit by a software; when the connected memory apparatus is the SDRAM with 2M*32 bit, configuring a data mask pin and a data interface of the decoding chip through the software so as to make the decoding chip to read and write the SDRAM with 2M*32 bit by a data line with a 16 bit lower. The invention configures the data mask pin and the data interface of the decoding chip through the software, modifies the connection of the decoding chip and the SDRAM hardware, and uses the 2M*32 bit SDRAM instead of the 4M*16 bit SDRAM. The performance of the 2M*32 bit SDRAM is just the same as that of the 4M*16 bit, while the utilization of the invention scheme will greatly reduce the cost.

Description

technical field [0001] The invention relates to a synchronous dynamic memory, in particular to a method for using the synchronous dynamic memory. Background technique [0002] Synchronous Dynamic Random Access Memory (SDRAM) is a kind of memory widely used in communication and digital products at present, and among them, 2M×32 (ie: 2M×32, the expression 2M×32 is used below) Bit SDRAM, because most chips do not support it, its application range is limited, so the price is also low. On the contrary, SDRAM with 4M×16 (ie: 4M×16, the expression 4M×16 is used below) bits is widely popular, and its price is relatively high, which increases the product cost. [0003] There is a very important pin on the decoding chip, that is, the data mask pin (Data I / O Mask, DQM), which is mainly used to shield unnecessary data lines and realize device selection and bus control of the storage system, including DQM0~DQM3. Among them, DQM0 controls DQ0-DQ7, DQM1 controls DQ8-DQ15, DQM2 controls ...

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Problems solved by technology

[0002] Synchronous Dynamic Random Access Memory (SDRAM) is a kind of memory widely used in communication and digital products at present, and among them, 2M×32 (ie: 2M×32, the expression 2M×32 is used below) Bit SDRAM, because most chips do not support it, its application range is limited, so the price is also low

On the contrary, 4M×16 (that is: 4M×16, the expression 4M×16 is used below) bit SDRAM is widely popular, and its price is relatively high, which increases the product cost.

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