Firmware program design mainly shows the step of development and flowchart with corresponding code segment.

固件程序设计主要说明开发的步骤和流程图，并辅以相应的代码段。

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In this paper, the hardware circuit design of USB interface based on PDIUSBD12 chip is introduced, meanwhile implement of USB firmware program...

文中介绍了基于PDIU S - BD 12芯片的USB接口的硬件电路设计，并介绍了USB固件编程的实现。

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Then, the whole systematic architecture, some hardwares and firmware program were detailed, finally, the main program and interrupt service program were provided.

洋细论述了系统的总体结构、部分硬件设计和相应固件程序的实现，给出了主程序和中断服务程序流程图。

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