xst.xmsgs

CCD信号由于其特殊性,一般不能有信号源产生,本程序采用VHDL语言

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<messages>
<msg type="warning" file="Xst" num="819" delta="unknown" >&quot;<arg fmt="%s" index="1">D:/MY_DESIGN/ISE/LXJ/CCDOUT/CCDOUT.vhd</arg>&quot; line <arg fmt="%d" index="2">39</arg>: The following signals are missing in the process sensitivity list:
<arg fmt="%s" index="3">cnt</arg>.
</msg>

<msg type="warning" file="Xst" num="737" delta="unknown" >Found <arg fmt="%d" index="1">4</arg>-bit latch for signal &lt;<arg fmt="%s" index="2">Date_out</arg>&gt;.
</msg>

<msg type="info" file="Xst" num="2371" delta="unknown" >HDL ADVISOR - Logic functions respectively driving the data and gate enable inputs of this latch share common terms. This situation will potentially lead to setup/hold violations and, as a result, to simulation problems. This situation may come from an incomplete case statement (all selector values are not covered). You should carefully review if it was in your intentions to describe such a latch.
</msg>

</messages>