I have problems with the short circuit detection of the PCA9955B led drive.
Short-circuit detection occurs automatically on all channels as soon as gradation continuous operation is started. They are false errors. The voltage V_O never exceeds the threshold voltage of 2.85V. The maximum measured voltage was 1.2V during gradation.
If I reset the errors, the short circuit error comes right back.
If I do not perform a gradation operation, the error register behaves correctly.