Revisions Affected

0, A

Details

When SDFM data settings—such as filter type or DOSR settings—are dynamically changed during run time, spurious data-filter-ready events will be triggered. The spurious data-ready event will trigger a corresponding CPU interrupt, CLA task, and DMA trigger if configured appropriately.

Workaround

When SDFM data filter settings need to be changed dynamically, follow the procedure below to ensure spurious data-filter-ready events are not generated:

1. Disable the data filter.
2. Delay for at least a latency of the data filter + 3 SD-Cx clock cycles.
3. Change data filter settings such as filter type and DOSR.
4. Delay for at least a latency of the data filter + 5 SD-Cx clock cycles.
5. Enable the data filter.