三星ARM7内核 44b0开发板的推荐扩展电路原理图 包括音频 现场总线接口 液晶屏触摸屏 数码管 按键 电机等等 可做开发参考-Samsung ARM7 development board' s recommendation 44b0 kernel extension circuit schematics including audio field bus interface, digital LCD touch-screen control buttons, and so do mot