PXN20RM Datasheet, PDF (815/1376 Pages) Freescale Semiconductor, Inc – PXN20 Microcontroller

InitDMABuffern
Determine next buffer start address
CNBCRn[15:0]
Determine next buffer end address
CNBCRn[31:16]
Write data to CNBCRn
at PBI address 0x13 + 4 * n
Ensure buffer is either filled for
transmission or ready for data reception
Set RDY to 1 in CSCRn[15]
at IO address 0x11 + 4 * n
ReturnDMABuffer
Figure 27-26. Initialize DMA Buffer
Media Local Bus (MLB)
Freescale Semiconductor
PXN20 Microcontroller Reference Manual, Rev. 1
27-43