Clock of ULPI on Jacinto 6 in OTG/HOST mode

Mickey Hu

Other Parts Discussed in Thread: TUSB1210

Does the ULPI_CLK of USB3 is input only on Jacinto 6?

We want connect ULPI_USB3 to USB PHY (TI TUSB1210) that the clock of PHY is bidirection, output for device mode input for HOST/OTG mode.

How can i config the ULPI_CLOCK of USB3 in HOST/OTG mode?

Thank you.

over 8 years ago

0 Kevin LaRosa over 8 years ago

TI__Genius 17380 points

Hi Mickey,

I've moved your post to the DRAx Infortainment forum since it relates to the SoC rather than the PMIC.

0 Stanislav Stilyanov over 8 years ago

TI__Mastermind 18200 points

Hi Mickey,

ULPI_CLK is input-only for the SoC. USB controller cannot generate this clock.

Regards,

Stan

0 Mickey Hu over 8 years ago in reply to Stanislav Stilyanov

Intellectual 400 points

Hi Stan,

Does ULPI_CLK also generate from outside in Host mode?

Is it no matter either Host or Device mode right?

Because of TUSB1210 have two application circuit that the ULPI_CLK needs generate from controller in Host mode.

0 Stanislav Stilyanov over 8 years ago in reply to Mickey Hu

TI__Mastermind 18200 points

Mickey,
Right, it is not obvious from the first look in the datasheet. Clock source in independent of the host/device mode.

From the datasheet:
6.2.1 Host or OTG, ULPI Input Clock Mode Application
Figure 6-1 shows a suggested application diagram for TUSB1210 in the case of ULPI input-clock mode
(60 MHz ULPI clock is provided by link processor), in Host or OTG application. Note this is just one
example, it is of course possible to operate as HOST or OTG while also in ULPI output-clock mode.

Regards,
Stan

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Clock of ULPI on Jacinto 6 in OTG/HOST mode