Channel Enabled

The software can enable one or more channels at any time using the following enable sequence.

1. Setup channel mode (simple or scatter-gather mode).
2. Set the PS_ZDMA.CH_DATA_ATTR and PS_ZDMA.CH_DSCR_ATTR attribute registers.
3. Setup DMA mode.
   1. Simple mode, program the DSCR registers.
   2. In scatter-gather mode, program the DSCR in memory and program the DSCR start address register.
4. Set enable bit in the PS_ZDMA.CH_CTRL2 register. This provides a trigger to the DMA channel.