杭州立宇泰公司的ARM9开发板armsys2410-core的protel图纸，内容准确细致，是进行二次开发和制做外围电路的有用资料。-Hangzhou Li-yu-tai' s ARM9 development board armsys2410-core of protel drawings, meticulous accuracy is secondary to the development and production of useful information on the ex