The book has to usb serial bus standards and protocols have a more detailed introduction is a good learning usb data

Packet : 57578867pcb.rar filelist
PCB基础和设计技巧\PCB基础和设计技巧\PCB.pdf
PCB基础和设计技巧\PCB基础和设计技巧
PCB基础和设计技巧

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