PXN20RM Datasheet, PDF (818/1376 Pages) Freescale Semiconductor, Inc – PXN20 Microcontroller

Media Local Bus (MLB)
ProcCintDMA
(Part 2)
CSCRn[PBD] ^no
== 1?
yes
DMA current buffer done
CSCRn[PBPE] ^yes
== 1?
no
Protocol error detected on MediaLB
during previous buffer
Notify application
CSCRn[PBDB] ^yes
== 1?
no
Process previous buffer
in system memory
Break request detected on MediaLB
during previous buffer
Notify application
ReturnCintDMA
(Part 2)
Figure 27-29. DMA Ping-Pong Buffer Channel Interrupt (part 2)
27-46
PXN20 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor