TUSB8041A: Power on Reset Timing

Hello,

I am trying to use the TUSB8041A but when I connect my computer to the upstream port my computer says that the USB device is unrecognizable. I am thinking that the problem is with the power supply start up and power on reset timing. In the datasheet on page 34 it states that

"The 1 µF capacitor on the GRSTN pin can only be used if the VDD11 supply is stable before the VDD33 supply. The depending on the supply ramp of the two supplies the capacitor may have to be adjusted."

The datasheet also states on page 11, footnote 1:

"An active reset is required if the VDD33 supply is stable before the VDD11 supply. This active Reset shall meet the 3ms power-up delay counting from both power supplies being stable to the de-assertion of GRSTz."

I am supplying the 3.3V with a linear regulator and the 1.1V with a buck converter, both off a 5V buck. Therefore the 3.3V is stable before the 1.1V voltage is stable. See below the transient supply voltage for 1.1V (yellow) and 3.3V (Blue). The 3.3V is stable about 1ms before the 1.1V.

Now adding the GRSTz pin on channel 3 as the pink signal. Here you can see that the reset signal is de-asserted with a long RC ramp. From the datasheet I believe once the voltage gets to 2V then the reset is de-asserted. In which case that point happens about 15ms after both supplies are stable. Could you please tell me if I am mis-reading the datasheet and if the reset may be the reason why I am not able to connect to the upstream port?

Thanks!

Erik