本代码使用于基于6225平台的音乐手机，使其支持标准耳机（无mic）而不出现插入中断通话或无法拨入的问题。-The codes is used to make music phone which based 6225 platform support standard earphone which has 3.5mm interface.

这个是MTK6228的手机原理图及PCB板，很有参考价值，其中MIC设计，耳机设计很不错的-This is MTK6228 phone schematic and PCB, a good reference, in which MIC design, the headset design is very good