A Virtual Multi-Channel SDRAM Access Method Supporting Flexible Block Access

Abstract

The invention belongs to the field of storage technology, and discloses a virtual multi-channel SDRAM access method that supports flexible block access, uses FIFO to isolate different clock domains, and performs cross-clock domain processing, data splicing, and data caching, so it supports different channels in different channels. Read and write data in the clock domain; perform sequential write address calculations, sequential read address calculations, and block read address calculations during sequential access and block access to SDRAM; schedule switching between multiple channels, and perform multi-channel switching Arbitrate and control the amount of data read and written each time; the SDRAM controller connects the user layer interface and SDRAM; and converts the read and write addresses, commands, and data into correct timing relationships and sends them to the SDRAM bus. The invention can reduce the logic resource occupation of FPGA, rationally utilize the limited bus bandwidth of SDRAM, improve the utilization rate of SDRAM bus bandwidth and improve the bandwidth capability.

Description

technical field

[0001] The invention belongs to the technical field of storage, and in particular relates to a virtual multi-channel SDRAM access method supporting flexible block access. Background technique

[0002] At present, with the rapid development of the aerospace industry and the continuous development and updating of satellites such as the Beidou series, the relay satellite network can already cover areas around the world, but there is no ability to establish ground receiving stations around the world, so the satellites sent are very difficult It is difficult to receive all the data through the ground receiving station, and it needs to rely on the relay network for relay transmission. The bandwidth of the relay network is limited. In order to realize the transmission of a large amount of data under the limited bandwidth, a large number of large Capacity storage is used to complete the collection, storage, and real-time processing of on-board data, and they play an ...

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