Hi Sir,
My customer would like design TUSB8042. please refer to design material here.
password: "ti"
https://txn.box.com/s/9e2p95jcjbkrb43ffy578h01lorsjdqn
the currently PCB is back. however, the TUSB8042 is not recognized on the Windows.
Would you please review the schematic and let us know if any issue?
1. USB_VBUS is an input to the hub and should only be high when an active hub is connected. What is the pin 48 voltage?
>>0.5V
2. Do you place the EERPOM on the board? If yes, please remove the EEPROM.
No EEPROM on the board
3. Where the TUSB8042 upstream connect to? PCIE? How do you know this is hub failed?
>>Connect to Nvidia Jetson Xavier NX USB interface, need to confirm that Hub connection and setting is correct.
4. Adding a pullup on the PWRCTL lines enables battery charging on that port. What is the pin 35 and pin 36 voltage?
>>3.3V
5. The capacitor on GRSTz may need to increase to 2 uF if the power on ramp times are slow. What is GRST pin 50 voltage?
>>3.195V
power and GRST pin waveform
is the setting here right?
BR,
SHH