This is the use of EM78P447/EM78P451 and SL811HS developed USB HOST program that can read data of USB device and be displayed on the LCD。there is a right schematic diagram file.

Sl118
.....\a0161.Ddb
.....\A0161B.DT
.....\SL811HS.prj
.....\UsbHost_0826_SL811HS.asm
.....\UsbHost_0826_SL811HS.asm.bak
.....\USBHOST_0826_SL811HS.lst

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