Phenomenon:
• Plug in power supply DC jack to power on M/B, check all function work properly.
• Execute the command: “reboot”, then TK1 system will be hanging.
We have some finding as following
The +1.05V_RUN power will lose after the command “reboot” was being excuting.
Monitor I2C interface between TK1 with PMIC, TK1 does not complete the I2C command procedure to PMIC.
Then M/B hang.
Upgrade SW to R21.7 can fix the “sw reboot fail issue” but there are side effects when we continuously reboot M/B by SW command more than 200 times: the USB3.0 interface will be no working.
Above failure symptom follows CPU, we duplicated it by AB swap approach.
Please let me know detail about what’s modified on R21.7, why it impacts USB3.0 and how to fix this bug.
Thanks
R21.7 SW can solve “sw reboot fail issue” on failure board, but USB3.0 fail?
Swap Tegra chips of failure board and good board, the “sw reboot fail issue” will go with chip to good board, and the failure board will have no issue?
Hi,
I will check if devkit is available and function ok first, then swap failure chip. It will take some time becasue we must have BGA rework process internally.
Thanks
Hi,
We have found two chips with reboot issue. Can we ship one to you for RMA process first? We will try to rework the other one on TK1 devkit and this will take some time.
Hi,
We have started RMA process with your team but they asked that we must provide serial number. Actually, we don’t keep it because the serial number is outside the package, the package is discarded after we use it. It’s difficult to keep all package on our production line for TK1 chip. Could you advise me other way without serial number?