
Chapter 3: Building the SOPC System 3–7
Specify the SOPC Builder System Components
© June 2009 Altera Corporation Nios II System Architect Design Tutorial
Preliminary
Add a Scatter-Gather DMA Controller
The scatter-gather DMA controller fetches data from the video frame buffer on the
DDR SDRAM and sends the data to the video pipeline. To add a Scatter-Gather DMA
Controller to your system, perform the following steps:
1. Under System Contents, expand Memories and Memory Controllers, expand
DMA, and double-click Scatter-Gather DMA Controller.
2. Under Transfer options, for Transfer mode, select Memory To Stream.
3. Under Data and error widths, for Data width, select 64.
Figure 3–6 shows the Scatter-Gather DMA Controller MegaWizard interface after
you perform this step.
4. Click Finish.
5. In the Module Name column, right-click the Scatter-Gather DMA Controller
component’s name, click Rename, and rename the new component lcd_sgdma.
6. In the Connections column, ensure that your system has the connections listed in
Table 3–2.
Figure 3–6. Scatter-Gather DMA Controller Component Settings
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