Good morning to all and thank you for possibility to ask question here.
First of all, I am total beginner and I have no knowledge or ARM or Segger J-Link
now about a problem:
I have Automotive PCB which contains MB9DF126 as main Logic board after some research I find out that only SEGGER J-Link programmer is able read this device MB9DF126 for this reason I purchased one. Even I had no experience with...
I did back-engineering of JTAG pins and created as picture below.
ibb.co/KGM8h0Q
![](https://forum.segger.com/index.php/Attachment/5759-Main-Logic-board-JTAG-web-jpg/?thumbnail=1&s=1514d975e5794556843462877ab4c4864b9e9b55)
I powered this Automotive PCB by normal connector and I saw CAN 500 kbps (on my scope )for car network this mean this PCB was working OK.
After I connected JTAG probe with SEGGER J-link Pro and I used program J-Flash and successfully connected to device. TAB Target ->Connect
after I download complete Data from MB9DF12
ibb.co/2nVVHTq
![](https://forum.segger.com/index.php/Attachment/5760-Screenshot-2023-10-20-083329-png/?thumbnail=1&s=1514d975e5794556843462877ab4c4864b9e9b55)
Which was 8192KB – I try few times verify this data when PCB was run and always verifying process pass.
SAMPLE OF SAVED DATA
OBC 3 failure data Entire flash chip.zip
After I decided try rewrite this data back to MB9DF126 to confirm than I will able transfer data across variation of PCBs for future. Just make clone of PCB if need to be.
But there was error when write and now my PCB is dead no CAN 500kbps anymore and looks like it my MB9DF126 is erased.
LOG attached :log when fail.txt
Please expert can you help me to some have my PCB back to life ?
And help me to understand how is possible Read / Write this MB9DF126
Thank you very much V.
First of all, I am total beginner and I have no knowledge or ARM or Segger J-Link
now about a problem:
I have Automotive PCB which contains MB9DF126 as main Logic board after some research I find out that only SEGGER J-Link programmer is able read this device MB9DF126 for this reason I purchased one. Even I had no experience with...
I did back-engineering of JTAG pins and created as picture below.
ibb.co/KGM8h0Q
I powered this Automotive PCB by normal connector and I saw CAN 500 kbps (on my scope )for car network this mean this PCB was working OK.
After I connected JTAG probe with SEGGER J-link Pro and I used program J-Flash and successfully connected to device. TAB Target ->Connect
after I download complete Data from MB9DF12
ibb.co/2nVVHTq
Which was 8192KB – I try few times verify this data when PCB was run and always verifying process pass.
SAMPLE OF SAVED DATA
OBC 3 failure data Entire flash chip.zip
After I decided try rewrite this data back to MB9DF126 to confirm than I will able transfer data across variation of PCBs for future. Just make clone of PCB if need to be.
But there was error when write and now my PCB is dead no CAN 500kbps anymore and looks like it my MB9DF126 is erased.
LOG attached :log when fail.txt
Please expert can you help me to some have my PCB back to life ?
And help me to understand how is possible Read / Write this MB9DF126
Thank you very much V.
The post was edited 2 times, last by urgiv ().