TUSB9261: If USB3 data lines are not present, will the chip resort to USB2 interface and speeds?

Hi Simon,

USB 2.0 - Hi-Speed has a datarate of 480Mbps
USB 3.0 - Has a datarate of 5Gbps
Sata Gen 1 - 1.5Gbps
Sata Gen 2 - 3Gbps

While the TUSB9261 will still establish a USB connection if USB3.0 lines were not present, it won't be able to communicate through SATA since the datarate in USB 2.0 is too slow to keep up with SATA.

Regards,

Nicholaus

Do you mean the device will present itself, but you wont be able to read or write data to the drive?

We dont need full sata bandwidth for this project, the 480Mbps is plenty... as long as it connects and reads and writes... at USB2 speeds. :) 

Hi Simon,

Alright, SATA Gen2 has the ability to go down to 480MBps, but it's not clear if this is how the TUSB9261 was designed.  So, I'll need to ask internally and confirm if it can work this way.  Give me a couple of days.

Regards,

Nicholaus

Hi Simon,

Sorry for the delay, still looking into this.

Regards,

Nicholaus

Ace, thank you Nicholaus for checking that for me. Was getting worried I might have to find another chip :)

No problem!

If there is anything I can help you with let me know.  If not, then please mark as resolved.

Thanks,

Nicholaus

Done thanks :)