There are 4xUSB 3.0 ports on carrier board but only one on nano itself, how?

Hello,

I am trying to figure out the USB 3.0 ports on nano carrier board. I’ve checked the nano hardware design guide. In the datasheet, in Table 62 and 63 Jetson Nano Pin Desc. there are:

pins: 109 & 111 | on nano described as: USB 2.0 port 0–> on carrier described as: USB 2.0 Micro AB

pins: 115 & 117 | on nano described as USB 2.0 port 1–> on carrier described as USB 3.0 Type A

pins: 121 & 123 | on nano described as USB 2.0 port 2–> on carrier described as M.2 Key E

And there are also USBSS RX and TX:

pins: 161 & 163 | on nano described as USBSS Recieve (USB 3.0)–> on carrier described as USB 3.0 Type A (input)

pins: 166 & 168 | on nano described as USBSS Transmit (USB 3.0)–> on carrier described as USB 3.0 Type A (output)

So how come there are 4xUSB 3.0 ports on Jetson Nano’s carrier board? I couldn’t figure out. Are there any carrier board schematics that i can check out?

The carrier has a USB 3 hub on it.

Hi ipek,

If you are designing a custom board, you can refer to USB chapter in product DG (https://developer.nvidia.com/embedded/dlc/jetson-nano-product-design-guide)

If you are asking for design of dev kit, please refer to its schematic (https://developer.nvidia.com/embedded/dlc/Jetson-Nano-Carrier-Board-Reference-Design-Files)