参数资料
型号: IPR-SDRAM/DDR2
厂商: Altera
文件页数: 44/106页
文件大小: 0K
描述: IP DDR2 SDRAM CONTROLLER RENEW
标准包装: 1
系列: *
类型: MegaCore
功能: DDR2 SDRAM 控制器
许可证: 续用许可证
3–8
Chapter 3: Functional Description
Device-Level Description
The control_doing_wr and control_wdata_valid signals are completely
identical outputs from the controller when it is in DDR2 SDRAM mode. If the
controller is issuing full size write bursts, the control_dqs_burst signal should be
issued for one clock cycle longer than control_doing_wr . If the controller is not
writing for the full length of the memory burst length, the control_dqs_burst
signal should be kept asserted so that the DQS toggles for the full length of the burst.
DQS Group Block Diagrams
Figure 3–4 on page 3–9 shows the Stratix II DQS group block diagram; Figure 3–5 on
page 3–10 shows the Stratix DQS group block diagram; Figure 3–6 on page 3–11
shows the Cyclone II DQS group block diagram; and Figure 3–7 on page 3–12 shows
the Cyclone DQS group block diagram.
? March 2009 Altera Corporation
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