Altera RLDRAM II Controller MegaCore Function Bedienungsanleitung PDF herunterladen (Seite 20)

2–10 MegaCore Version 9.1 Altera Corporation

RLDRAM II Controller MegaCore Function User Guide November 2009

Block Description

● rldramii_dq[8:0] is captured by the delayed

rldramii_qk[0]

● rldramii_dq[17:9] is captured by the delayed

rldramii_qk[1]

● rldramii_dq[26:18] is captured by the delayed

rldramii_qk[2]

● rldramii_dq[35:27] is captured by the delayed

rldramii_qk[3]

■ QVLD is always captured by the delayed version of

rldramii_qk[0] for the associated RLDRAM II device. In

Figure 2–6 there are four rldramii_qk[] signals. Only

rldramii_qk[0] per RLDRAM II device captures the associated

QVLD signal:

● rldramii_qvld[0] is captured by the delayed

rldramii_qk[0]

● rldramii_qvld[1] is captured by the delayed

rldramii_qk[2]

■ After the capture registers all captured read data is clocked off the

undelayed rldramii_qk[] signal that captures the QVLD signal

for a particular RLDRAM II device:

● All RLDRAM II 0 captured data is clocked off the undelayed

rldramii_qk[0]

● All RLDRAM II 1 captured data is clocked off the undelayed

rldramii_qk[2]

■ Only one capture_clk[] per attached RLDRAM II device is

output from the datapath:

● RLDRAM II 0 capture data is associated with

capture_clk[0], which is the delayed rldramii_qk[0]

● RLDRAM II 1 capture data is associated with

capture_clk[1], which is the delayed rldramii_qk[2]

Read Data Capture Clock Association

Figure 2–7 shows the read data and data strobes at the memory interface

for the example datapath in Figure 2–6. Figure 2–8 shows how the

capture_clk[] associates with the captured read data,

control_rdata[] at the datapath interface.

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 61 62

Keine Kommentare

Altera RLDRAM II Controller MegaCore Function Bedienungsanleitung Seite 20