Xilinx V2.1 Manuel d'utilisateur télécharger pdf (Page 91)

Math 91

Xilinx Blocks

♦ equal-to (a = b)

♦ not-equal-to (a != b)

♦ less-than (a < b)

♦ greater-than (a > b)

♦ less-than-or-equal-to (a <= b)

♦ greater-than-or-equal-to (a >= b)

The outputof theblock isa 1-bitunsigned number. Itis 1 ifthe comparisonis true and

0 if false.

Block Parameters Dialog Box

The block parameters dialog box can be invoked by double-clicking the icon in your

Simulink model.

Figure 3-62: Relational block parameters dialog box

The only parameter speciﬁc to the Relational block is:

• Comparison Operation: speciﬁes the comparison operation computed by the

block.

Other parameters usedby thisblock areexplained in the CommonParameters section

of the previous chapter.

Xilinx LogiCORE

The block uses the Xilinx LogiCORE: Comparator V5.0 if the Implement with

Xilinx Smart-IP Core checkbox is selected and the output widths to the block

are between 1 and 64, inclusive. Otherwise, the block is implemented as a

synthesizable VHDL module.

The Core datasheet can be found on your local disk at:

%XILINX%\coregen\ip\xilinx\eip1\com\xilinx\ip\baseblox_v5_0\do

c\compare.pdf

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Xilinx V2.1 Manuel d'utilisateur Page 91