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RM48L952 SPI2 DMA Request Source

Daniel Schulz
Prodigy 40 points
Other Parts Discussed in Thread: RM48L952, RM48L950

Hi,

I have been trying to setup a DMA transfer using the SPI2 port of the RM48L952, I have had no problem doing this using the SPI3 port, but I have not been able to get the same code to work once adjusted for SPI2.

While looking into the issue, I noticed I was using an old datasheet to determine the DMA request sources. In the old datasheet SPNS177A, Table 4-33 indicates that SPI2 is available as a DMA request source (by default mapped to DMAREQ[2] and DMAREQ[3]). The more recent datasheet SPNS177B has these two lines removed from the same table (eg: SPI2 is not available as a request source).

I couldn't see this mentioned anywhere else and it is still listed as available in other RM48 device datasheets such as the RM48L950.

Is it correct that SPI2 is not available as a DMA request source on the RM48L952, but is available on the other RM48 devices (eg: L950)?

Thanks,

Daniel.