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Hi,
I am in the board bring up process of TUSB8041 USB hub. I am using micro bo connectors for upstream and down stream ports. I am using no EEprom configuration or the default settings of the device. But when I am connecting to the computer I am getting "unknown usb device " error on windows 7.
Vdd33: 3.3V
Vdd: 1.2V (instead of nominal 1.1V)
Crystal: http://www.digikey.com/product-detail/en/445I23D24M00000/CTX1173CT-ND/3135114?WT.srch=1
I checked the power and voltage is coming in. and all the pins looks connected normal. I am attaching schematic for further reference. Andy help is appreciated!
is this some thing to do with GRSTz? what does GRSTz assertion mean?
FYI:
For power on the device I tried connecting 1uF capacitor to the pin 50. Also, I tried using a power on reset device shown below which is supposed to be reset at 140ms:
more screen shots of unknown device detection