Other Parts Discussed in Thread: TUSB4020BPHPEVM
Dear sir,
We have follow the TUSB4020BPHPEVM schematic for hub design, i have place all the values that given in EVM but we did not get output, first of all please tell me the debug procedure.
can i follow as per the evaluation board schematic or is there any changes in that .
we are using external EEPROM for configuring the TUSB4020. for TUSB4020 initial working purpose EEPROM is mandatory?
Reset not working properly. we got 1.8v on reset pin, we made power on reset circuit that time 3.3v presented on reset pin after 3ms.
if i place external reset circuit, please tell me the resistor value,
crystal did not produce clock pulse, voltage maintain in both pins (XO XI) is 1.2V,
we placed USB_R1 is 10k now, is this correct or not? , this value can affect crystal function,
Thanks and Regards