Recovery mode using USB 3.2 for AGX Orin

Autonomous Machines Jetson & Embedded Systems Jetson AGX Orin
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1

Hi,

The design manual states the following: To be able to communicate in recovery mode using USB 3.2, does the USB 2.0 (USB0 port) also need to be connected to the host PC?
In other words, can I use only USB 3.2 (Port #1)?

[18.1 USB Recovery Mode]
Recovery mode can operate in either USB 2.0 or USB 2.0 + USB 3.2 modes. Recovery mode using USB 2.0 is from interface USB0_N/P only. No other signals are required or supported for entering Force Recovery mode. Neither VBUS nor ID detection is needed. If the force recovery strap is held low coming out of reset, Jetson AGX Orin will configure USB0 as a device and enter recovery mode. For USB 3.2 recovery mode, the USB 3.2 port must be Port #1 on the UPHY_RX1/TX1 pins.

Best Regards,
UNA

3

Hi,

No matter what case. Jetson does not allow a usb port to have only usb3 lane. USB3 port must have both usb2 and usb3 lanes together.

Also, some extra software configuration is needed to enable usb3 flash. The document will be ready in next jetpack release.

4

Hi WayneWWW,

Thank you for your reply.
If I want to use only USB 2.0, can I use only USB0 port on AGX Orin like the Orin NX (Orin Nano) below?

Jetson Orin NX Series and Orin Nano Series Design Guide
[Figure 7-1 USB Micro B USB Device and Recovery Connection Example]

Best Regards,
UNA

5

Hi,

Are you talking about you only want usb2 for flash? The recovery mode only requires hardware to be correct.

6

Hi,

I am considering the following USB configuration, is this possible?

image
image898×230 4.13 KB

Best Regards,
UNA

7

Hi,

Only one port could be device mode port on jetson.
So if your are sure your USB0 + USB3.2#1 port won’t be device mode after boot into kernel, then it should be okay.

8

Hi,

Let me ask an additional question.
The data sheet below states that only USB 2.0 (USB0 port) can be used in Device and the other ports are Host only. Does this mean that USB 2.0 (USB1 port) cannot be used in Device mode?

==
Universal Serial Bus Specification Revision 2.0, plus the following:
• Modes: Host and Device (Only USB 2.0 port USB0 supports RCM, Host, Device Mode. All other ports are Host only).

Jetson_AGX_Orin_Series_Data_Sheet_DS-10662-001_v1.5.pdf

Best Regards,
UNA

9

Only USB0 port could be “recovery mode” port. But every usb port on the board could be used in device mode.

Recovery mode port is not fully equal to device mode port.

However, only one port could really in device mode at same time for any usecase.

11

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