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RT8973A是具有配件检测能力的USB接口开关,可防止低压系统受到不正常高压 (高达28V) 造成的损坏,支持高速USB操作,使用I2C控制接口。RT8973A通过出现在USB接口ID引脚和VBUS的电压信号完成设备检测功能,因为ID引脚上的阻抗和VBUS电压的组合标示了不同配件的独特特性。主机微处理器能通过I2C接口控制开关连接位置,读出配件检测的结果。在对USB接口充电器的识别方面,RT8973A能分辨出专用的充电器 (D+/D-短路) 和大功率主机/共享器充电接口。
支持高速USB操作
支持UART切换
设备插入和拔出时发出中断信号
保护动作可引发中断
默认启动模式支持工厂作业
兼容BCD 1.2电池充电器检测标准
直流适配器28V保护能力
VBUS通道集成过压/过流保护开关,可在故障情形下断开连接
I2C控制接口
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