TLF35584: IF.ABIST and IF.MON are both set during single ABIST

[enjoyinf]

Hi experts, 

    After the first single interrupt  or safe state related comparator on the full path and test, IF.ABIST and IF.MON bit are both set. However, ABIST_CTRL0.STATUS = 5, ABIST_SELECTx = 0 and the corresponding bit in the MONSFx register is set , which seems right.

What is the reason for this?

Thanks

[Albab_A]

Hello,

Thanks for the query. In order to provide detailed solution, can you please describe the status for MONSFx and values after reading the bits to check which bit is set .

Best Regards,

Albab

[enjoyinf]

Hi AliAl,

  Thanks for your reply. I tested VBAT_OV, and MONSF3 is 0x01h.

  After I block the conditions in the red box in the following figure, all ABIST can pass.

Thanks

[enjoyinf · Accepted solution]

Hi AliAl,

  I found that the reason for the IF.MON is always set was due to the grounding of the STU, which resulted in a persistent Preg UV fault. 

Thanks