PDB ADC pre trigger sequence error recovery

Jarvis_vk — Fri, 26 Jun 2026 12:30:27 GMT

Hi NXP community,

ADC0/ADC1 Interrupts Stop After Runtime Flash Erase/Program Operation on S32K144

As a continuation of my previous question, I need some clarification on how to properly recover from a PDB ADC pre-trigger sequence error on the S32K144.

I tried the following three methods, but only one of them worked correctly.

Method 1 (working):

Stop PDB0 and PDB1 before performing the flash erase/program operation.
After the flash operation is complete, restart both PDBs and re-enable the corresponding ISRs.

With this approach, no PDB sequence error occurs.

Method 2:

After the flash erase/program operation was completed, I stopped and restarted PDB0 and PDB1. However, a PDB pre-trigger sequence error occurred. I then attempted to recover by stopping and restarting the PDB modules again, but the sequence error persisted.

Method 3:

Method 3 (Not Working):

I did not stop or restart PDB0 and PDB1 during the flash erase/program operation. Instead, after the operation completed, one pending PDB ISR and ADC ISR were triggered.

Inside the PDB ISR, I attempted to clear the sequence error flag using:

PDB0->CH[0].S &= (uint32_t)(~PDB_S_ERR_MASK);

The corresponding ADC ISR was then executed, and reading the ADC result register cleared the COCO flag. I expected this to prevent further pre-trigger sequence errors, but the issue still persisted and this method did not work.

My question is: once a PDB pre-trigger sequence error has been triggered, is it possible to recover the PDB/ADC operation and resume normal triggering without resetting the system? Or does the PDB need to be stopped and restarted beforehand to avoid entering an unrecoverable state?

topic PDB ADC pre trigger sequence error recovery in S32K

PDB ADC pre trigger sequence error recovery