Chapter 7: ML561 Hardware-Simulation Correlation

R

DDR2 DQ is a bidirectional signal. To perform hardware measurements for a Write operation that is not interrupted by a Read response or a Refresh operation, the testbench on FPGA1 is controlled by DIP switches (SW2) as indicated in Table 7-3.

Table 7-3:DIP[1:2] Settings

Setting

Description

 

 

2’b00 or 2’b11

Normal alternating Write/Read sequence

 

 

2’b01

Write only, Refresh disabled

 

 

2’b10

Write once, then Read only, Refresh disabled

 

 

60

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Virtex-5 FPGA ML561 User Guide

 

 

UG199 (v1.2) April 19, 2008

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Xilinx ML561 manual 3DIP12 Settings Description