Related to case Host and Device operation for TUSB1210 (EVM)
Case 3: If I want to interface to a USB Hub, my TUSB1210 acts as a Host and the the Hub acts as a USB Device on its upstream port.
After we do a high-speed handshake (following ULPI spec page 40) between our TUSB1210 Host and downstream USB Hub (Device), we send a SETUP packet along with a DATA packet. However, we do not receive an ACK back from the downstream USB Hub (Device). Can you recommend why there is no ACK response? We do see the SETUP and DATA packet on the logic analyzer.
Thanks, Roland
