附图1-1A为GW48-CK型EDA实验开发系统的主板结构图（GW48-GK/PK型未画出，具体结构说明应该参考实物主板），该系统的实验电路结构是可控的。即可通过控制接口键SW9，使之改变连接方式以适应不同的实验需要。因而，从物理结构上看，实验板-Figure 1-1A for the GW48-CK-type EDA experimental development system board structure (GW48-GK/PK type does not draw, the specific structure of that kind should be taken into the motherboard), the experimental circuit of the system structure is controllable. Through the control interface can be key SW9, so that connection to change to adapt to the needs of different experiments. Thus, from the physical structure, the experimental board