DMA Programming Basics
DMA Channels 6-5
6.1.2.3 Peripheral to DMA FIFO
The DMA controller transfers data from the internal peripherals HDI16 and EFCOP,
which reside on the PowerPC local bus, to the DMA FIFO. It also transfers data from
peripherals on the external PowerPC system bus to the DMA FIFO. Figure 6-5 shows
both of these options. The relevant DMA channel can be programmed either to external or
internal request mode, depending on the peripheral type.
Figure 6-5. Peripheral to DMA FIFO Transfers
6.1.2.4 DMA FIFO to Peripheral
The DMA controller transfers data from the DMA FIFO to such internal peripherals as the
HDI16 and EFCOP. It also transfers data from the DMA FIFO to external peripherals on
the PowerPC system bus. Figure 6-6 shows both of these options.
MEMC
DMA
FIFO
MEMC
SIU
PowerPC Local
PowerPC System
HDI16
EFCOP
MEMC
DMA
FIFO
MEMC
SIU
PowerPC Local
PowerPC System
Internal Peripheral Transfer
External Peripheral Transfer
External
Peripheral
Comments to this Manuals