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OCM RAM and SDMA, on OMAP 3503 and 3530?

Daniboy
Prodigy 150 points
Other Parts Discussed in Thread: OMAP3530

Hi,

Does the OCM RAM have a connection with the SDMA?

I'm using the OMAP3530 and 3503.

Thanks,

  • 0
    TI__Guru 64470 points

    Daniboy said:

    Does the OCM RAM have a connection with the SDMA?

    The On-Chip Memory RAM is connected to the L3 Interconnect as depicted in Figure 11-81 of the OMAP35xx Technical Reference Manual (SPRUF98).  Yes, the SDMA has access to the OCM_RAM. This is mentioned in the notes of Figure 11-81.

  • 0 in reply to BrandonAzbell
    Prodigy 150 points

    Ok, I see the interconection through the L3, therefore what is the specific sDMA Request Line for the OCM?

    Thanks,

  • 0 in reply to Daniboy
    TI__Guru 64470 points

    If I understand your question correctly, there isn't a dedicated sDMA channel event for the OCM.  Typically, a memory block is not a type of peripheral or device that requests transfers.  Peripherals like serial ports, other processors, etc. would be a type of device that would request DMA access.

    Therefore, to use the SDMA with the OCM, either the processor would setup a transfer and trigger it itself, or utilize a peripheral that can perform a request like this.