# Internal USB ports

**URL:** <https://forum.clockworkpi.com/t/internal-usb-ports/9765>\
**Category:** uConsole\
**Created:** [March 21, 2023, 11:40pm UTC](https://forum.clockworkpi.com/t/internal-usb-ports/9765 "2023-03-21T23:40:35Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![yatli](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/yatli/32/6253_2.png) [@yatli](https://forum.clockworkpi.com/u/yatli)\
**Post date:** [May 4, 2023, 3:59am UTC](https://forum.clockworkpi.com/t/internal-usb-ports/9765/6 "2023-05-04T03:59:33Z")

</div>

Mainboard is more or less the same. For maximum core compatibility, only one USB host port is routed to the core.  
The USB host port is then multiplexed into 4 downstream device ports with a GL850G usb hub chip.  
These four ports are then routed to:

1. The cpi keyboard (pogo pins connected)
2. A type-A port along the mainboard edge
3. and 4 to the mPCIE connector
  - the 4G dongle most probably takes one of that

The question is whether they leave pads/pins for the last usb port on the 4G expansion board.

If so we can expand it like this: [Internal USB hub mod](https://forum.clockworkpi.com/t/internal-usb-hub-mod/8643)

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