Part Number: TUSB8020B
The first batch of PCBs has arrived; however, we are experiencing issues with the USB functionality.
After reviewing the schematics, I have identified two primary errors
1. Power Switch Port Swap
- The input and output ports of the USB power switch were inadvertently swapped.
2. Power-on Timing Mismatch
- The timing sequence between VDD and the Global Reset (GRST) does not align wit
h the datasheet specifications.
I am currently testing a hardware fix by increasing the capacitance on the GRST line to delay the reset signal and allow VDD to stabilize.
I will provide an update once we confirm if this resolves the communication issue.