I am trying to operate with TUSB1310A for USB SuperSpeed device.
I have tried to solve PIPE initial operation problem with many changes, but still have same problems.
I checked the power sequence and strap option pin, and there is no issue.
About strap option, if I change the ISO_START (ULPI_DATA7) to 1, the PCLK is hold to low.
When I change the REFCLKSEL1/0 (ULPI_DATA5/4) value, the PCLK frequecy is changed.
So I think the strap option input works well.
In sum, the problem is as following.
1. the "PHY_STATUS" always holds low value although the "POWER_DOWN1/0" change. (2->0, 0->3,3->0...)
and although the "RX_ELECIDLE" is low.
2. the "PCLK" is always running with 250Mhz frequency although "POWER_DOWN" is 2'h3.
3. the ULPI interface works well at USB high/full-speed. just the PIPE interface is not working.
Please tell me any suggestion to solve this problem.
Best Regards,
