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RT8973A是具有配件檢測能力的USB介面開關,可防止低壓系統受到不正常高壓 (高達28V) 造成的損壞,支援高速USB操作,使用I2C控制介面。RT8973A通過出現在USB介面ID引腳和VBUS的電壓信號完成設備檢測功能,因為ID引腳上的阻抗和VBUS電壓的組合標示了不同配件的獨特特性。主機微處理器能通過I2C介面控制開關連接位置,讀出配件檢測的結果。在對USB介面充電器的識別方面,RT8973A能分辨出專用的充電器(D+/D-短路)和大功率主機/共用器充電介面。
支援高速USB操作
支援UART切換
設備插入和拔出時發出中斷信號
保護動作可引發中斷
預設啟動模式支援工廠作業
相容BCD 1.2電池充電器檢測標準
直流適配器28V保護能力
VBUS通道集成過壓/過流保護開關,可在故障情形下斷開連接
I2C控制介面
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