说明：  在D12的数据手册中定义了一套压缩了所有访问PDIUSBD12功能的命令集，命令接口部分就是将各命令用函数的形式加以实现。
(D12 data in the definition of a set of manual compression of all visits PDIUSBD12 function command set, the command interface is part of the order form with function to achieve.)