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Omap3503 HSUSBOST1 configuration

maurizio Bonifazi
Prodigy 50 points
Other Parts Discussed in Thread: OMAP3503, TUSB1210

Hello,

I have a problem to configure an usbhost port of the omap3503

I have connected an USB3317 the the USBhost1 port of the omap3503.  The pin CLKOUT (60MHz clock) of the USB3317 it is connected the the pin HSUSB1_CLK of the OMAP3503. Than I need to configure the HSUSB1 port in clock slave mode.

It is possible?

What are the register to configurre?

  • 0
    TI__Guru 63055 points

    The HSUSB1 port only operates as clock master.  You must use a ULPI PHY that supports the optional clock input mode defined in the ULPI specification.  The TI TUSB1210 is one example of a ULPI PHY that supports this option.

    Regards,
    Paul

  • 0 in reply to peaves
    Prodigy 50 points

    It is possible to do this?

    I will connect the CLOCKOUT of my USB3317 to HSUSB0_CLK (this port can be slave) and tell to the HSUSB1 port to use the HSUSB0_CLK?

  • 0 in reply to maurizio Bonifazi
    TI__Guru 63055 points

    The USB1377 data sheet is not available in public domain, so I can not verify this ULPI PHY supports the optional clock input mode required by the USB Host subsystem.

    If you plan to use the HSUSB1 port, you must use the 60MHz ULPI clock output from the HSUSB1 port to source the clock to a ULPI operating in clock input mode.

    If the USB3317 does not support this mode of operation, you will need to use a different ULPI PHY, like the USB3320 or TUSB1210, that supports clock input mode.

    Regards,
    Paul

  • 0 in reply to peaves
    Prodigy 50 points

    Hello Paul,

    this is clear, but I have asked you another things.

    The USBHOST0 of omap should be work with clock input.

    The USBHOST1 port of the omap can work with the clock of the USBHOST0 clock?

    Best regards

    Maurizio