TK1 reboot fail issue

Autonomous Machines Jetson & Embedded Systems Jetson TK1
1

Hi
I have a one question for nVidia TK1 CD575M-A1
TK1 use a PMIC AS3722-BCTT-09 or AS3722-BCTT-13
Could you tell me what is different? and how to select it
Tony

2

Hi qqa681023,

The version in our Jetson TK1 schematics (PM375 v4.04) and BOM is the AS3722-BCTT-09, if you want to get the different, please contact with AMS for more information of AS3722-BCTT-13.

Do you want to use the same PMIC on another project and wonder if it is compatible? Just curious.

Thanks

3

Hi
I use TK1 CD575M-A1+PMIC AS3722-BCTT-09 in our factroy
Some problems occurred during factory production
Some parts of the chip(TK1) can’t send I2C command the PMIC, which can’t be successfully booted.

Normal board TK1 I2c to AS3722 instructions
40Wa 01a 28a
40Wa 00a 3ca
40Wa 06a 28a
40Wa 12a 10a
40Wa 16a 3Fa

40Wa 90a S40Ra 0C~a
40Wa 91a S40Ra 01~a
40Wa 4Da S40Ra 7F~a
40Wa 4Da 7Fa
40Wa 04a 24a
40Wa 09a 81a
40Wa 0Aa 01a
40Wa 20a S40Ra 00~a
40Wa 20a 04a

Abnormal board TK1 I2c to AS3722 instructions
40Wa 01a 28a
40Wa 00a 3ca
40Wa 06a 28a
40Wa 12a 10a
40Wa 16a 3Fa

40Wa 04a 24a ,The time that 1.05V was started is after this instruction.

Maybe TK1 check something faill, Power on fail
Please help me list TK1 power on check some state
I will check it

Actually,At present, the repair of the factory is repaired by replacing the TK1.
TK1 is expensive, I want to know which items are causing 1.05V to fail to start.

＂Could you provide TK1 CD575M-A1 SMD reflow Reflow Profile Data for me＂
I will check it for our factory
thanks your help

Tony Chiu

4

Hi, did you check all signals listed in the power sequence in Design Guide? That is important to locate possible issue.

Here is the link of reflow profile: [url]http://developer.nvidia.com/embedded/dlc/tk1-process-recommendation[/url], if you suspect the soldering issue, you can run X-ray test to check if any joint soldering issue.

Also you might need to compare your design to reference board, and check all difference carefully based on Design Guide. [url]https://developer.nvidia.com/embedded/dlc/tegrak1-embedded-design-guide[/url]

5

Hi
I check design guide
No new discoveries

How about I2C command
Some fail pary TK1, I2c Just send this message
40Wa 01a 28a
40Wa 00a 3ca
40Wa 06a 28a
40Wa 12a 10a
40Wa 16a 3Fa
system hang

At this moment
Which items will TK1 check?
Could you share to me
I will check it
Thank
Tony Chiu

6

Basically system will not hang if only I2C command fail. Do you have any normal boards? If so, it might mean the board manufacture has problem, maybe the soldering or other items. Please check that.

7

Hi
Actually
I compare Abnormal board and Normal board
A/B Swap TK1
The failure condition follows TK1(fail part)

Tony

8

Hi
I found a possible answer.
Base on Nvidia TK1 R21.7 BSP Can fix this issue
Originally used Nvidia TK1 R21.5
Could you tell me what’s different
The difference between R21.5 and R21.7
thanks your help

Tony

9

Hi,
Summary for reboot issue on TK1,

  1. The +1.05V_RUN power will lose after the command “reboot” was being excuting.
  2. Monitor I2C interface between TK1 with PMIC, TK1 does not complete the I2C command procedure to PMIC.
    Then M/B hang.
  3. Upgrade SW to R21.7 can fix the “sw reboot fail issue” but there are side effects when we continously reboot M/B by SW command more than 200 times: the USB3.0 interface will be no working.
  4. 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
10

Hi, please clarify:

  1. R21.7 SW can solve “sw reboot fail issue” on failure board, but USB3.0 fail?
  2. 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?