USB PHY芯片

參考：

https://www.zhihu.com/question/51436808

ULPI_v1_1

https://www.sparkfun.com/datasheets/Components/SMD/ULPI_v1_1.pdf

http://cross-hair.co.uk/tech-articles/ULPI%20interface.html

https://www.beyondlogic.org/usbnutshell/usb3.shtml

https://www.usb.org/documents?search=&tid_2%5B0%5D=40&items_per_page=50

https://www.mentor.com/products/ip/usb/usb20otg/phy_interfaces

https://www.ti.com/lit/ds/sllse16e/sllse16e.pdf?ts=1592220488191&ref_url=https%253A%252F%252Fwww.google.com%252F

https://www.techdesignforums.com/practice/technique/usb-3-0-physical-layer/

https://ip.cadence.com/ipportfolio/ip-portfolio-overview/interface-ip/usb-ip/usb-3-0-phy-2/usb3-ss-phy

usb3.0

https://www.eefocus.com/liangziusb/blog/11-12/236193_34684.html

hs usb2.0

http://ww1.microchip.com/downloads/en/DeviceDoc/evb3320.pdf

http://ww1.microchip.com/downloads/en/Appnotes/AN19.0-Application-Note-DS00002959A.pdf

http://ww1.microchip.com/downloads/en/DeviceDoc/evb3320user.pdf

http://ww1.microchip.com/downloads/en/DeviceDoc/00001792E.pdf

opencores

https://opencores.org/projects/usb1_funct

https://opencores.org/projects/usb

USB 2.0 Physical

USB 2.0 Physical Layer(PHY

Layer(PHY) Design

) Design