Altera RLDRAM II Controller MegaCore Function User Manual Page 19

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Altera Corporation MegaCore Version 9.1 2–9
November 2009 RLDRAM II Controller MegaCore Function User Guide
Functional Description
Figure 2–6. Example Datapath
Figure 2–6 shows the following points, which are applicable for all
interface configurations:
Each DQS rldramii_dq[] byte group is captured by the delayed
version of its associated rldramii_qk[] data strobe:
Datapath
Optional
Pipeline
Registers
RLDRAM II
Device 1
RLDRAM II
Device 0
Read
Data
Logic
Optional
Pipeline
Registers
QVLD
Group 1
DQS Group 3
control_rdata[35:18]
control_qvld[1]
capture_clk[1]
rldramii_dq[35:27]
rldramii_qk[3]
Optional
Pipeline
Registers
Read
Data
Logic
DQS Group 2
control_rdata[71:54]
rldramii_dq[26:18]
rldramii_qk[2]
rldramii_qvld[1]
Optional
Pipeline
Registers
Read
Data
Logic
Optional
Pipeline
Registers
QVLD
Group 0
DQS Group 1
control_rdata[17:0]
control_qvld[0]
rldramii_dq[17:9]
rldramii_qk[1]
Optional
Pipeline
Registers
Read
Data
Logic
DQS Group 0
control_rdata[53:36]
rldramii_dq[8:0]
rldramii_qk[0]
rldramii_qvld[0]
capture_clk[0]
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