Altera Cyclone III FPGA Guia do Utilizador descarregar pdf (Página 18)

3–4 Altera Corporation

Cyclone III FPGA Starter Kit User Guide July 2010

DDR SDRAM/ SSRAM/On-Chip Controller

The following sections describe how to access the DDR SDRAM. You can

use the same procedure to access the SSRAM.

Read/Write Data

To read from and write to the DDR SDRAM, follow these steps:

1. Click the DDR SDRAM tab (Figure 3–3). The Address column

indicates the hex address of the DDR SDRAM. The values inside the

0-3, 4-7, 8-B, and C-F columns are the DDR SDRAM contents in hex

words format.

Figure 3–3. Control Panel DDR SDRAM Tab

2. To write a 32-bit word to the DDR SDRAM, click the desired

location, enter the desired value in hex format, and press Enter.

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 35 36

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Altera Cyclone III FPGA Guia do Utilizador Página 18