Jetson TX2i Module Support
The Linux for Tegra Board Support Package provides support for Jetson TX2i, a Jetson TX2 module SKU suitable for industrial environments.
TX2i Flashing Support
The overall flashing process for Jetson TX2i module is the same as for Jetson TX2.
The flashing command is:
sudo ./flash.sh jetson-tx2i mmcblk0p1
• Consult the Jetson TX2/TX2i Module Datasheet for details on the Jetson TX2 modules.
Powering On a TX2i Device
Prior to powering on the TX2i device, it is assumed that the P2597 carrier board is installed. Consult the Jetson TX1/TX2 Carrier Board Specification document for notes about using Jetson TX2i with various revisions of the P2597 carrier board.
To power on the Jetson TX2i C00 module
• Press and hold the power button for a few seconds.
If the power is ON, pressing and holding the power button turns the power OFF.
Feature Support for Error Correction Code
Note: | Error Connection Code is enabled by default on Jetson TX2i. ECC is NOT supported for Jetson TX1 or TX2. Ensure it is disabled on Jetson TX1 or Jetson TX2 devices. |
The Error Correction Code (ECC) features include:
• Full DRAM scrubbing in MB1to generate parity bits required for ECC
• SBE Correction in the kernel
• DBE detection in kernel and crash
• Memory available to the kernel is extended from 2 regions to the actual available regions
• Position independent UBoot support
Disabling ECC
To disable ECC, the Jetson TX2i configuration file must be modified. The configuration file is available at:
<top>/Linux_for_Tegra/jetson-tx2i.conf
Where <top> is the directory where you downloaded and installed L4T.
To disable ECC
1. Modify the following DTB:
BPFDTB_FILE=tegra186-a02-bpmp-storm-p3489-a00-00-ta795sa-ucm1.dtb
2. Add ECC disabled as follows:
BPFDTB_FILE=tegra186-a02-bpmp-storm-p3489-a00-00-ta795sa-ecc-disabled-ucm1.dtb
3. Additionally, modify the following configuration file:
EMMC_BCT=P3489_A00_8GB_Samsung_8GB_lpddr4_204Mhz_P134_A02_ECC_en_l4t.cfg
4. Omit the ECC enabling as follows:
EMMC_BCT=P3489_A00_8GB_Samsung_8GB_lpddr4_204Mhz_P134_A02_l4t.cfg
Compatability Issues
The compatability issues noted with the Jetson TXi module include:
• TX2i is compatible with CVB B04 or newer.
• The behavior of the power button functions differently on the CVB C00 board. Consult
Powering On a TX2i Device for details.
• Memory bandwidth reduction
Due to the DRAM ECC, 12.5% of the memory is reserved for EEC parity bits. This in turn causes an equivalent reduction in the memory bandwidth.
• DRAM ECC is enabled by default. Consult
Disabling ECC for instructions on disabling.
Note: | ECC does NOT function on Jetson TX1 and TX2 devices. |
• Shutdown from the system is NOT available.
Unlike on Jetson TX1 or TX2, the system cannot initiate a shutdown. Any attempts to shutdown results in a reboot. Consequently, using the shutdown command causes a reboot of the system:
shutdown -h now
• Jetson TX2i works with two power profiles: UCM1 and UCM2; UCM1 profile is default.
The UCM1 power profile is as follows:
Temp | Mission Profile | Operating Lifetime | Unit | VMAX V | FMAX MHz |
90 C | 24/7 | 10 years | GPU | 0.945 | 1236.75 |
CPU (D15/A57) | 0.945 | 1958/1920 |
EMC/SOC | 0.945 | 1600 |
105 c/80 c | 8 hours/day (105 c) + 16 hours/day (80 c) | 10 years | GPU | 0.945 | 1236.75 |
CPU (D15/A57) | 0.945 | 1958/1920 |
EMC/SOC | 0.945 | 1600 |
• With the voltage and frequency value settings as specified, the system is operational with the maximum temperature of 90 C for 10 years of operating life.
• If the TX2i system must operate at above 100 C, a time limit of 8 hours per day must be maintained.
• Using the maximum temperature of 105 C for 8 hours, and the remaining 16 hours at a maximum temperature of 80 C ensures operational life for 10 years.
The UMC2 power profile is as follows:
Temp | Mission Profile | Operating Lifetime | Unit | VMAX V | FMAX MHz |
105 C | 24/7 | 4.4 years | GPU | 0.8 | 918 |
CPU (D15/A57) | 0.8 | 1497/1420 |
EMC/SOC | 0.83 | 1600 |
• With the voltage and frequency value settings as specified, the system is operational life is 4.4 years.
To use the UCM2 power profile
1. Navigate to the Jetson TX2i configuration file.
2. Change p2771-3489-ucm1.conf to p2771-3489-ucm2.conf.
