The design scheme which USES FPGA as the main controller is presented in detail, including the internal interface of SDRAM, process of data transmission and realization of ping-pong operation.

详细介绍了以FPGA为主控器的设计方案，包括SDRAM内部接口设计、数据传输过程以及乒乓操作的实现方法。

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Based on the ping-pong type field grounding protection, it presents one-point-to-ground protection scheme by integrating the self-checking method of switches.

针对乒乓式励磁回路接地保护，结合开关自检方法提出了完整的一点接地保护方案；

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In this article, we introduce the ping pong operation into the asynchronous FIFO design and provide a FIFO design scheme in FPGA.

根据异步fifo的设计方法，引入乒乓操作的设计技巧，给出了一种用FPGA实现异步fifo的设计方案。

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