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Usage Notes and Known Design Exceptions to Functional Specifications
25
SPRZ412K–December 2013–Revised February 2020
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TMS320F2837xD Dual-Core MCUs Silicon Revisions C, B, A, 0
Advisory SDFM: Dynamically Changing Data Filter Settings (Such as Filter Type or DOSR)
Will Trigger Spurious Data Acknowledge Events
Revision(s) Affected 0, A, B, C
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(s) 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 SDFM data filter.
2. Change SDFM data filter settings such as filter type or DOSR.
3. Delay for at least a latency of data filter + 5 SD-Cx clock cycles.
4. Enable the SDFM data filter.
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