Freescale Semiconductor MPC8313E PowerQUICC II Pro Family Reference Manual page 581

DMA/Messaging Unit
2. Poll the DMASRn[CB] to make sure the DMA channel is idle.
3. Initialize the DMACDARn to point to the first descriptor in the chain.
4. Initialize the DMAMRn[CTM] to indicate chaining mode. Other control parameters in the mode
register can also be initialized here if necessary.
5. First clear then set the DMAMRn[CS] to start the DMA transfer.
MPC8313E PowerQUICC™ II Pro Integrated Processor Family Reference Manual, Rev. 2
Freescale Semiconductor 12-21