IS it possible to disable USB 3.0 interface in TUSB1310A (TI's PHY chip) and only use USB 2.0 signals?

Trupesh Vasoya

Other Parts Discussed in Thread: TUSB1310A, TUSB1211, TUSB1210

Hi,

I am working on USB 3.0, and currently we use TI's phy chip (TUSB1310A - superspeed Transceiver with pipe3 and ULPI interface) as a physical layer of USB 3.0. TI's phy chip support USB 3.0 and USB 2.0 both interface, i want to disable pipe3 interface from PHY level and only use to ULPI signals then is it possible???

I have already option to disable PIPE3 interface from my IP core, but I want to disable it from PHY level, There is one signal Phy_mode in TI's Phy chip but i not found perfect explanation about that signal.

Thanks

over 12 years ago

0 Elias Villegas M. over 12 years ago

TI__Guru* 76130 points

Hello,

The PHY_MODE pins must be set according to the datasheet.

Are you planning to use the USB3.0 interface in the future?

If not, we recommend to use the TUSB1210 or TUSB1211.

Regards.

0 Trupesh Vasoya over 12 years ago in reply to Elias Villegas M.

Prodigy 100 points

Thanks for your response

Actually I want to know that for some testing purpose, In future I want both interface together, so let me know if any other way for disable pipe interface on TUSB1310A and use only ULPI signals.

can we use Strapping option (ISO_START) for disable pipe interface? and if yes then how?

0 Elias Villegas M. over 12 years ago in reply to Trupesh Vasoya

TI__Guru* 76130 points

Yes,

You can use ISO_START.

All the strapping pins are sampled at the de-assertion of RESETN so you will have to set high the ISO_START pin before the reset de-assertion, after that you can use this pin as ULPI_DATA7.

Regards.

0 Trupesh Vasoya over 12 years ago in reply to Elias Villegas M.

Prodigy 100 points

Thanks

Is there any hardware level setting for that?

Actually we are having problems with EMC, when a USB 2 cable is connected.

Is it possible to completely turn off the USB 3 transceivers, when the PHY(TUSB1310A) is connected on USB 2?

Regards,

0 Elias Villegas M. over 12 years ago in reply to Trupesh Vasoya

TI__Guru* 76130 points

Hello,

There is no option to disable the drivers. Have you identified the EMI source?

Regards.

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IS it possible to disable USB 3.0 interface in TUSB1310A (TI's PHY chip) and only use USB 2.0 signals?