Secondly, the hardware structure of the interface module is described in detail, mainly including data latch and buffer circuit, choice circuit of transmission rate, etc.

详细叙述了通讯板接口模块的硬件结构设计，其中，对数据缓冲电路、数据传输速率选择电路、逻辑控制电路等各关键点做了重点介绍；

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Secondly, the hardware structure of the interface module is described in detail, mainly including data latch and buffer circuit, choice circuit of transmission rate, etc.

详细叙述了通讯板接口模块的硬件结构设计，其中，对数据缓冲电路、数据传输速率选择电路、逻辑控制电路等各关键点做了重点介绍；

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