Hi all,
I would like to ask if anyone has implemented a physical usb interface in a development board of altera that has not mounted a usb inf.
The core for usb1.1 and 2.0 are available but do i need certain physical layer to implement usb?
I heared that for low speed i dont need to implement anythin just drive the wires into the fpga but for high speed i need to implement the phy intf.
Any suggestions? Thanks
"Angelos" writes: |> Hi all, |> |> I would like to ask if anyone has implemented a physical usb interface in a |> development board of altera that has not mounted a usb inf. |> |> The core for usb1.1 and 2.0 are available but do i need certain physical |> layer to implement usb? |> |> I heared that for low speed i dont need to implement anythin just drive the |> wires into the fpga but for high speed i need to implement the phy intf.
If you need a High Speed (480 Mbit/s) USB 2.0 interface, it is probably safest and least trouble to pick an existing integrated PHY such as
Markus
For USB1 1.5 Mbps it can be done with a mcu-PIC, 12 Mbps can proberbly also be accomplished fairly easily. USB2 480 Mbps is another ballgame.. but with enough MHz it maybe will work .. ;)
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