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USB OTG mode , PCB can't open USB device

Question asked by Maco Chen on Jun 5, 2018
Latest reply on Jun 7, 2018 by Maco Chen

IMX6DL板子PMIC輸出各點電壓和时序都正確USB_OTG_ID管脚悬空,BOOT模式选为串行下载,USBOTG连接电脑后,电脑显示有辨識的HID-compliant device,但是NXP DDR Tool 卻顯示 Eorr : Can't open usb device,請問是什麼原因。 ( 備註: USB_OTG_ID 準位 Low,由 CPU 控制介接至 ENET_RX_ER ;查詢資料 USB_OTG_ID 準位因該為 High )@

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