USB 3.2 Compliance Test Guide
PRELIMINARY INFORMATION
Jetson AGX Orin Series Tuning and Compliance Guide DA-11040-001_v0.7 | 8
Putting the Orin module USB 3.2 Controller in
Compliance Mode
For Gen1 (5 Gb/p) TX Electrical Tests refer to sections TD.1.1, TD.1.3, and TD.1.4. For Gen2 (10
Gb/s) TX Electrical Tests, refer to sections: TD 1.4, TD 1.5, and TD1.7. These sections can be
found in the
Electrical Compliance Test Specification SuperSpeed Universal Serial Bus
at the
following link: https://www.usb.org/document-
library/electrical-compliance-test-
specification-superspeed-usb-10-gbps-rev-10
Perform the following steps to place the device under test (DUT) into compliance mode:
1. Boot up the DUT. Ensure the USB 3.2 (Gen1 or Gen2) host test fixture is not connected to
the DUT.
2. Install the latest OS (Linux, for example) image for the Orin module.
3. Install the devmem2 tool (for the Linux installed in Step 2, for example) by running the
following command.
$ sudo apt-get install devmem2
4.
Launch the USB 3.2 Compliance Test Software on the scope.
5. Disable the auto suspend for the controllers:
$ echo on > /sys/bus/usb/devices/usb1/power/control
$ echo on > /sys/bus/usb/devices/usb2/power/control
6.
Enter compliance test mode.
$ ./devmem2 0x03610420 w 0x10340
$ ./devmem2 0x03610430 w 0x10340
$ ./devmem2 0x03610440 w 0x10340
Plug in the USB 3.2 host test fixture to DUT. The other end of fixture should be connected to a
scope such that DUT TX+/- with 50 ohm termination on the scope.
For connection details refer to the “Transmitter Test Topologies” section in
USB 3.0 Electrical
Test Fixture Topologies
, at the following link: https://www.usb.org/document-library/usb-31-
electrical-test-fixture-topology
7. Use ./devmem2 0x3610420 (that is, for L0) command to read back the LTSSM state.
Notes: The Orin module contains three USB 3.2 ports.
The PORTSC offset and pin # are:
• HS_UPHY0_L0_TX/RX (pins F13/E13/B15/B16), offset = 0x420
• HS_UPHY0_L1_TX/RX (pins E12/D12/A14/A15), offset = 0x430
• HS_UPHY0_L2_TX/RX (pins F11/E11/B13/B12), offset = 0x440
Writing 0x10340 will change the internal state of XUSB. Therefore, it is not expected to read back
the same value. However, Bits[8:5] should be set to 0xA for compliance test mode, otherwise
repeat Steps 1 through 7.
8. Connect RX+/- to external Ping.LFPS (20 MHz frequency; two periods) signal generator.
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