RAM 7.0 Betriebsanweisung PDF herunterladen (Seite 72)

LogiCORE IP Block Memory Generator v6.1

72 www.xilinx.com DS512 March 1, 2011

Product Specification

Power Estimate Options

The Power Estimation tab on the left side of the GUI screen shown in Figure 59 provides a rough

estimate of power consumption for the core based on the configured Read width, Write width, clock

rate, Write rate and enable rate of each port. The power consumption calculation assumes a toggle rate

50%. More accurate estimates can be obtained on the routed design using the XPower Analyzer tool.

See www.xilinx.com/power

for more information on the XPower Analyzer.

The screen has an option to provide "Additional Inputs for Power Estimation" apart from configuration

parameters. The following parameters can be entered by the user for power calculation:

• Clock Frequency [A|B]: The operating clock frequency of the two ports A and B respectively.

• Write Rate [A|B]: Write rate of ports A and B respectively.

• Enable Rate [A|B]: Average access rate of port A and B respectively.

Structural/UNISIM Simulation Model Options

Select the type of warning messages and outputs generated by the structural simulation model in the

event of collisions. For the options of ALL, WARNING_ONLY and GENERATE_X_ONLY, the collision

detection feature will be enabled in the UniSim models to handle collision under any condition.

The NONE selection is intended for designs that have no collisions and clocks (Port A and Port B) that

are never in phase or within 3000 ps in skew. If NONE is selected, the collision detection feature will be

disabled in the models, and the behavior during collisions is left for the simulator to handle. So, the

output will be unpredictable if the clocks are in phase or from the same clock source or within 3000 ps

in skew, and the addresses are the same for both ports. The option NONE is intended for design with

clocks never in phase.

X-Ref Target - Figure 59

Figure 59: Power Estimate Options Screen

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RAM 7.0 Betriebsanweisung Seite 72