Xilinx XAPP721 Benutzerhandbuch

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Figure 3:  Write Data Transmitted Using OSERDES

Figure 4: Write Strobe (DQS) and Data (DQ) Timing for a Write Latency of Four

D1

D2

D3

D4

CLKDIV

CLK

CLKdiv_90

CLKfast_90

OSERDES

DQ

IOB

ChipSync

TM

 Circuit

Write

Data

Words

0-3

X721_03_080305

CLKfast_0

Clock Forwarded 
to Memory Device 

Command WRITE 

IDLE 

D0 D1 D2 D3 

Control (CS_L) 

Strobe (DQS) 

Data (DQ), OSERDES Output 

X721_04_120505

CLKfast_90

March 2006

Memory Interfaces Solution Guide

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