timing_report.htm

vhdl经典源代码——键盘接口设计

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  <BR><B>Number of constraints not met:</B>&nbsp;4<BR>
<HR>
<A NAME="DataSheet"></a>
<h2 ALIGN="center" CLASS="cpldta_text_section_header">Data Sheet Report</h2>
 <A NAME="ClockSpeedList"></a>
 <h3 CLASS="cpldta_text_subsection_header">Maximum External Clock Speeds</h3>
 <TABLE  WIDTH="80%" border="1" ALIGN="center">
  <TR>
   <TH BGCOLOR="#FFFFCC" WIDTH="40%" CLASS="cpldta_constraint_header">Clock</TH>
   <TH BGCOLOR="#FFFFCC" WIDTH="20%" CLASS="cpldta_time_header">fEXT (MHz)</TH>
   <TH BGCOLOR="#FFFFCC" WIDTH="40%" CLASS="cpldta_constraint_header">Reason</TH>
  </TR>
  <TR>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">clk</TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">71.429</TD>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">Limited by Clock Pulse Width for clk</TD>
  </TR>
  <TR>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<15>.Q</TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">71.429</TD>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">Limited by Clock Pulse Width for cnt_scan<15>.Q</TD>
  </TR>
 </TABLE>
 <BR>
 <A NAME="SetupHoldTimesForClocks"></a>
 <h3 CLASS="cpldta_text_subsection_header">Setup/Hold Times for Clocks</h3>
 <BR>
 <A NAME="ClockToPadTiming"></a>
 <h3 CLASS="cpldta_text_subsection_header">Clock to Pad Timing</h3>
 <TABLE  WIDTH="80%" border="1" ALIGN="center">
  <CAPTION CLASS="cpldta_text_caption"><B>Clock clk to Pad</B></CAPTION>
  <TR>
   <TH BGCOLOR="#FFFFCC" WIDTH="80%" CLASS="cpldta_constraint_header">Destination Pad</TH>
   <TH BGCOLOR="#FFFFCC" WIDTH="20%" CLASS="cpldta_time_header">Clock (edge) to Pad </TH>
  </TR>
  <TR>
   <TD WIDTH="80%" CLASS="cpldta_datasheet_pathname">dataout<2></TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">34.500</TD>
  </TR>
  <TR>
   <TD WIDTH="80%" CLASS="cpldta_datasheet_pathname">dataout<4></TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">34.500</TD>
  </TR>
  <TR>
   <TD WIDTH="80%" CLASS="cpldta_datasheet_pathname">dataout<7></TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">34.500</TD>
  </TR>
  <TR>
   <TD WIDTH="80%" CLASS="cpldta_datasheet_pathname">dataout<1></TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">26.800</TD>
  </TR>
  <TR>
   <TD WIDTH="80%" CLASS="cpldta_datasheet_pathname">dataout<3></TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">26.800</TD>
  </TR>
  <TR>
   <TD WIDTH="80%" CLASS="cpldta_datasheet_pathname">dataout<5></TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">26.800</TD>
  </TR>
  <TR>
   <TD WIDTH="80%" CLASS="cpldta_datasheet_pathname">dataout<6></TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">26.800</TD>
  </TR>
  <TR>
   <TD WIDTH="80%" CLASS="cpldta_datasheet_pathname">en<0></TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">18.100</TD>
  </TR>
  <TR>
   <TD WIDTH="80%" CLASS="cpldta_datasheet_pathname">en<1></TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">18.100</TD>
  </TR>
 </TABLE><BR>
 <BR>
 <A NAME="ClockToSetupTimesForClocks"></a>
 <h3 CLASS="cpldta_text_subsection_header">Clock to Setup Times for Clocks</h3>
 <TABLE  WIDTH="80%" border="1" ALIGN="center">
  <CAPTION CLASS="cpldta_text_caption"><B>Clock to Setup for clock clk</B></CAPTION>
  <TR>
   <TH BGCOLOR="#FFFFCC" WIDTH="40%" CLASS="cpldta_constraint_header">Source</TH>
   <TH BGCOLOR="#FFFFCC" WIDTH="40%" CLASS="cpldta_constraint_header">Destination</TH>
   <TH BGCOLOR="#FFFFCC" WIDTH="20%" CLASS="cpldta_time_header">Delay</TH>
  </TR>
  <TR>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<0>.Q</TD>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<10>.D</TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">10.000</TD>
  </TR>
  <TR>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<0>.Q</TD>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<11>.D</TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">10.000</TD>
  </TR>
  <TR>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<0>.Q</TD>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<12>.D</TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">10.000</TD>
  </TR>
  <TR>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<0>.Q</TD>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<13>.D</TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">10.000</TD>
  </TR>
  <TR>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<0>.Q</TD>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<14>.D</TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">10.000</TD>
  </TR>
  <TR>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<0>.Q</TD>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<15>.D</TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">10.000</TD>
  </TR>
  <TR>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<0>.Q</TD>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<1>.D</TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">10.000</TD>
  </TR>
  <TR>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<0>.Q</TD>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<2>.D</TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">10.000</TD>
  </TR>
  <TR>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<0>.Q</TD>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<3>.D</TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">10.000</TD>
  </TR>
  <TR>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<0>.Q</TD>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<4>.D</TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">10.000</TD>
  </TR>
  <TR>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<0>.Q</TD>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<5>.D</TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">10.000</TD>
  </TR>
  <TR>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<0>.Q</TD>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<6>.D</TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">10.000</TD>
  </TR>
  <TR>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<0>.Q</TD>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<7>.D</TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">10.000</TD>
  </TR>
  <TR>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<0>.Q</TD>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<8>.D</TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">10.000</TD>
  </TR>
  <TR>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<0>.Q</TD>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<9>.D</TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">10.000</TD>
  </TR>
  <TR>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<10>.Q</TD>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<11>.D</TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">10.000</TD>
  </TR>
  <TR>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<10>.Q</TD>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<12>.D</TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">10.000</TD>
  </TR>
  <TR>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<10>.Q</TD>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<13>.D</TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">10.000</TD>
  </TR>
  <TR>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<10>.Q</TD>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<14>.D</TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">10.000</TD>
  </TR>
  <TR>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<10>.Q</TD>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<15>.D</TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">10.000</TD>
  </TR>
  <TR>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<11>.Q</TD>
   <TD WIDTH="40%" CLASS="cpldta_datasheet_pathname">cnt_scan<12>.D</TD>
   <TD WIDTH="20%" CLASS="cpldta_datasheet_time_value">10.000</TD>
  </TR>
  <TR>