TI中文支持网在用BQ25895做便携产品设计,现在想复用一个MicroUSB口做充电和USB上位机通讯之用
问题:当BQ25895在使用D+和D-完成输入电压识别后,D+和D-是否被释放?可以用作USB通讯
HAIBO CHEN1：
回复 Xiaohu Qin:
你好，DSEL是在完成充电类行检测后，自动置高的吗？需要能过I2C控制吗？
datasheet里面DSEL的功能描述如下，可以理解为如果识别到充电类型为DCP和MaxCharge，DSEL引脚电平会一直置低吗？如果识别到其它充电类型，比如QC2.0等，才会在识别完成后置高吗？
Open-drain D+/D- multiplexer selection control.Connect the DSEL to a logic rail via 10-KΩ resistor. The pin is normally float and pull-up by external resistor.During Input Source Type Detection , the pin drives low to indicate the device D+/D- detection is in progressand needs to take control of D+, D- signals. When detection is completed, the pin keeps low when DCP orMaxCharge is detected. The pin returns to float and pulls high by external resistor when other input source typeis detected
