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USB OMAP35 Mistral EVM Rev G

Liat Korner16353
Prodigy 30 points
Other Parts Discussed in Thread: OMAP3530

Hello,

I have the new Mistarl EVM for OMAP35.

I have a USB question on that board:

Can I use the OHCI controller for USB connection, or only the EHCI?

How can I connect mouse or keyboard without a hub?

Thanks for everyone who answers.

Liat

  • 0
    TI__Expert 7435 points

    I think OHCI interface is not available on Mistral EVM.  You could use the OTG port for connecting Keyboard/mouse.

     

    regards

    swami

  • 0
    TI__Genius 9460 points

    OMAP3530 Mistral EVM Rev-G also has EHCI only.

    so only OTG port can be used to connect low/Full speed devices such as mouse/Keyboard.

    -Ajay

  • 0 in reply to Ajay
    Prodigy 30 points

    Hi,

    Thank you both.

    Doesn't EHCI should support backward to OHCI? I also have the beagle board and it says that you can only use the EHCI contorller because of the phy connection (ULPI only, no serial support). Is this the same on the Mistral boards?

    The phy on the OTG port is also use ULPI connection, isn't it?

    Thank you very very much!

    Liat

  • 0 in reply to Liat Korner16353
    TI__Genius 9460 points

    The PHY on OTG is also ULPI but it's a different host controller and can support both HS and FS/LS devices at its root port. While in EHCI it can only support HS devices though they can support FS/LS devices with their companion OHCI port (same and desktop PC) but in OMAP3 there is no runtime switching possible between EHCI to OHCI controller on one port.

    -Ajay