# USB2 (ULPI)

## Requirements
* PHY (to be determined) <https://www.ti.com/product/TUSB1210>
* DDR mode
* ...
* USB3300 breakout https://www.waveshare.com/usb3300-usb-hs-board.htm

## LICENSE
BSD I guess...(fix me)

## Useful resources

![UTMI_interface](https://www.crifan.com/files/pic/serial_story/other_site/p_blog_bb.JPG)

![UTMI+levels](https://www.crifan.com/files/pic/serial_story/other_site/p_blog_aa.JPG)

![UTMI+level3_interface](https://www.crifan.com/files/pic/serial_story/other_site/p_blog_cc.JPG)

![LPI_signals](https://www.crifan.com/files/pic/serial_story/other_site/p_blog_dd.JPG)

![LPI_signals_table](https://www.crifan.com/files/pic/serial_story/other_site/p_blog_dd.JPG)

## reference
* <https://opencores.org/project,ulpi_wrapper> (GPL'd)
* <https://github.com/mossmann/daisho/blob/master/sw/fpga/common/usb3/usb2_ulpi.v> (BSD)
* <https://opencores.org/project,usb>
* <https://github.com/alexforencich/verilog-wishbone>
* <https://github.com/www-asics-ws/usb2_dev>