There is ‘Power ON’ issue with latest manufactured Jetson NANO Modules on the custom board.
We are testing 3 Case of custom board.
1 - Developer Kit (A02)
2 - Custom board with Power Logic (Power Logic is simmilar to Dev Kit)
3 - Custom board with MCU (MCU makes POWER_EN signal, It can control delay time)
And We are testing 3 case of modules.
A - Latest manufactured Modules
B - Old manufactured Modules
(* P/N are same between A and B modules : 900-13448-0020-000 )
Power On Results
Boot Sucess : 1A, 1B, 2B, 3B
Boot Fail : 2A, 3A
There is something change in booting sequence guide about Powen_EN delay time.
I think it related to our result. Firstl, I wanna know 400ms delay of Powen_EN signal is critical or not.
Becasue, Dev Kit power logic makes delay time around 280ms.
And Dev Kit works with latest manufactured module.
So, I wanna make it clear.
We can make delay time more than 400ms and It doesn’t works as same.
But there is something different thing in mcu case, there is noise at the begining of power input. I wonder this short noise can make fail to power on or not?
If issue is still with correct sequence, there might be some other difference between your design and devkit. You can compare your schematic to that of P3449.
BTW, is it real Developer Kit (A02) ? A02 is an early version number which is not compatible to B01 board. Can you share the carrier board number?
It is A02 board per the photo. A02 board should not be used with B01 devkit module. I have no idea about your board. But since it only happens on your board, you may need to compare your board schematic to P3449 B01 carrier board in DLC, especially on power part, to find out difference first.
It is weird. 1. you have unified two 5V, right? 2. Tried rework; 3. Used same components. All not boot?
Are you using same SW? Or did you flash same SW version to new and old modules? Do you have log? It looks that you have not route out the debug UART lines.
--------------- TEST MODULE------------
A - Latest manufactured Modules (5221 05-02)
B - Old manufactured Modules (5020 30-01)
(* P/N are same between A and B modules : 900-13448-0020-000 )
-------------- TEST BOARD -------------
Custom Board (P3449-B01 schematic COPY)
you have unified two 5V, right?
--------------------> Answer
attached file is “20220630_UNIFY_POWER_LINE_VDD_5V_IN.pptx” . 20220630_UNIFY_POWER_LINE_VDD_5V_IN.pptx (40.1 KB) Only USE One Power Line: VDD_5V_IN Power (+5V/ max 5A, DC-DC convertor). -. Result: Not BOOT
--------------------> Answer
I used POWER SUPPLY Eqipment(Power Source +5V).
I tried to change Adaptor Power(+12V/2A) to POWER SUPPLY EQ (+5V). -. Result: Not BOOT attached file is " 20220630_Power_Supply_VDD_5V_IN.pptx ". 20220630_Power_Supply_VDD_5V_IN.pptx (39.0 KB)
Tried rework;
--------------------> Answer
-. Result: Not BOOT
Used same components. --------------------> Answer Different components: U55, U50, U51, U59 I will get Original component and try test. -. Result: try, Not yet
Are you using same SW? Or did you flash same SW version to new and old modules?
----------------------> Answer A - Latest manufactured Modules (5221 05-02) —> New Module B - Old manufactured Modules (5020 30-01) —> Old Module
A, B Also working Boot in the “A02 Dev KIT” A module: Not BOOT (Custom Board, P3449-B01 schematic COPY) B module: OK BOOT (Custom Board, P3449-B01 schematic COPY)
Do you have log?
--------------------> Answer --------------- TEST MODULE------------ A - Latest manufactured Modules (5221 05-02) ( P/N are same between A and B modules : 900-13448-0020-000 )*
-------------- TEST BOARD ------------- A02 DEV KIT
--------------- TEST MODULE------------ A - Latest manufactured Modules (5221 05-02) B - Old manufactured Modules (5020 30-01) ( P/N are same between A and B modules : 900-13448-0020-000 )*
-------------- TEST BOARD ------------- Custom Board (P3449-B01 schematic COPY)