Lsm6dsv 9c boot loop after int

[Cutzo_500]

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Hi i have a custom lsm6dsv  module  that is getting  a strange result  after 6a 9c then cycles through  int of the imu 9c seem to make it restart its process  and loop it for a for until 6a is back and 9c comes back and does the exact  same process   and unsure  what i should look at next [ i am new to logic  analyzing oscilloscope   scopes signals  seem fine  i feel like im missing  something  badly 

Parts 100nf caps 

5.1k resistor  tired  10k but I thought  lower  them could solve it? Before  I do anything  dumb I need input on what could cause this i can also provide logic files from pulse veiw 

Thanks

[Federica Bossi · Accepted solution]

Hi @Cutzo_500 ,

The repeated 6A and 9C bytes with NACKs suggest I²C communication issues. Possible causes include incorrect register reads, timing problems, or bus noise. Check pull-up resistor values (2.2kΩ–10kΩ), ensure clean SDA/SCL signals on the scope, verify correct I²C address and read sequences, and confirm proper start/stop conditions. Slowing down the I²C clock and reviewing your code and logic analyzer captures can help identify the problem.

[Cutzo_500]

Thank you for the feedback  i did confirm  that shortly  after a oscilloscope  dig and found my bi solder to be unreliable  for this lga packages  and give a grainy  result  visual and confirmed after it was left for a bit a  when slient  logic and scope wise 

Do you have any recommendations  for sac or leaded  solder for these footprint reliablty  sac perrfered I dont want to risk another  project  from a bad choice  of solder brand