TLC549的初始化，TLC548/549片型小，采样速度快，功耗低，价格便宜，控制简单。适用于低功耗的袖珍仪器上的单路A/D或多路并联采样。-TLC549 initialization, TLC548/549 film-type small, the sampling speed, low power consumption, cheap, simple control. For low-power single compact instrument on the A/D or multipl