Astro Carrier for NVIDIA® Jetson™ TX2/TX2i
Users Guide
Document: CTIM-00456
Revision: 0.24
Page 26 of 47
Date: 2021-10-04
USB 2.0 – HDC
The Astro Carrier has two USB 2.0 Ports and one USB 3.0 Port available at the HDC.
Function
USB 2.0
Location
P2
HDC Bank
A
Pins
21, 37, 39, 45, 47, 51
USB2 Port 0 – pins 45/47
USB2 Port 0 OTG_ID – pin 57
USB2 Port 0 VBUS – pin 51
USB2 Port 1 – pins 37/39
Design Instruction
Please note that the USB2_VBUS (Pins 21 and 51) 5V @ 0.9A
No additional circuitry required
USB magnetics (ESD/EMI) placed on Astro Carrier
Route direct to header/connector/device
Force USB Recovery Mode
USB2 port 0 on pins 45 and 47 of the HDC can be used in force recovery mode. To enable force USB
recovery mode using the Astro Carrier follow the steps below:
1)
Power down the system completely. The system power MUST be OFF, not in suspend or sleep
mode.
2)
On the Astro Carrier change the DIP switch setting of SW1 so all switches are in the off position.
3)
Connect USB2 port 0 to a host PC.
4)
Power on the system.
5)
With the system powered on, ensure to assert FORCE_RECOV#; while FORCE_RECOV# is low,
trigger a reset by forcing RESET_OUT# low, release the RESET_OUT# and two seconds later
release FORCE_RECOV#.
After successfully updating the system software, ensure to enable USB2 port 0 host operation by
changing the DIP switch settings back to default, where switch 7 (OTG_ID) is in the ON position:
