Data transmission method of solid state hard disk SATA (serial advanced technology attachment) interface

Abstract

The invention provides a data transmission method of a solid state hard disk SATA (serial advanced technology attachment) interface. The data transmission method is applied to a solid state hard disk system, the system comprises an internal memory and a buffer memory, and the solid state hard disk comprises a SATA interface controller and a flash memory controller; and the SATA interface controller and the flash memory controller are both provided with PRD (polytechnical research and development) storage areas. The method comprises the following steps of: writing 32 PRD commands into the buffer memory, wherein each PRD comprises an address, a transmission form and direction information; writing block data into the internal memory by the SATA interface controller; reading out the PRD in the buffer memory, corresponding to the block data, by the SATA interface controller, and writing the PRD in the PRD storage areas of the SATA interface controller; and obtaining the PRD by the flash memory controller, and reading corresponding block data from the internal memory according to the PRD. Therefore, the data transmission method provided by the invention can greatly improve data processing speed of a SATA interface solid state hard disk.

Description

technical field [0001] The invention relates to the technical field of computers, in particular to a data transmission method of a solid-state hard disk SATA interface. Background technique [0002] Because the storage medium of SSD is Nand Flash, it has the functions of portability, high storage density, low power consumption and shock resistance, and its data transmission is also one of the important performances. The current transmission scheme between the SATA Device interface and the flash memory controller used in the solid-state hard disk is to store 32 PRDs to be transmitted in one PRD storage area, and these PRDs are all mapped to the storage area for storing data. Each PRD contains information such as address, data size, receiving or sending, as shown in the table below. [0003] [0004] However, the content of this PRD is long and the effective bits are few, which is unfavorable for the automatic transmission between SATA and the flash memory controller, and ...

AI Technical Summary

Problems solved by technology

For example, first the CPU sends a command to SATA to write data to DDR. After writing, the CPU then informs the flash controller to read a PRD from the SRAM. After the flash controller gets the command, it reads the PRD from the SRAM and saves it to the internal DMA of the flash controller for analysis. , in this data transmission method, the software needs to participate in more operations, while the hardware is less involved, thus affecting the data transmission speed

[0005] In summary, the existing data transmission method of SATA interface solid-state hard drive obviously has inconvenience and defects in actual use, so it is necessary to improve it.

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