📄 00675.html
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN">
<html>
<head>
<title>A.7.5 System timing checks</title>
<meta http-equiv="Content-Type" content="text/html; charset=GB2312" />
<meta name="generator" content="Doc-O-Matic" />
<meta http-equiv="Content-Style-Type" content="text/css" />
<link rel="STYLESHEET" href="default.css" type="text/css" />
<script type="text/javascript" src="scripts.js"></script>
</head>
<body class="Element700" onload="onBodyLoadEx('systemverilog31a.html', 'topic', '00675.html');" onmousedown="onBodyMouseDown();">
<!-- Begin Popups -->
<div class="Element801" id="popup00705">
<div class="Element800">
<div class="Element14">
链接</div>
<div class="Element11">
<div class="Element10">
<a href="00670.html" target="topic">A.7 Specify section</a>, <a href="01022.html" target="topic">主题</a></div>
</div>
</div>
</div>
<!-- End Popups -->
<!-- Begin Page Header -->
<div class="Element710" id="areafixed">
<div class="Element92">
<table width="100%" cellspacing="0" cellpadding="0">
<tr><td width="33%">
<div class="Element1">
<a href="#" onmousedown="showPopup(this, 'popup00705');"><img src="seealsolink.png" border="0" alt="" title=""></a> SystemVerilog 3.1a语言参考手册</div>
</td><td width="34%">
<div class="Element2">
</div>
</td><td width="33%">
<div class="Element90">
<a href="00674.html" target="topic"><img src="btn_prev_lightblue.gif" border="0" alt="Previous" title="Previous" onmouseover="switchImage(this, 'btn_prev_lightblue_hover.gif');" onmouseout="switchImage(this, 'btn_prev_lightblue.gif');"></a><a href="00670.html" target="topic"><img src="btn_up_lightblue.gif" border="0" alt="Up" title="Up" onmouseover="switchImage(this, 'btn_up_lightblue_hover.gif');" onmouseout="switchImage(this, 'btn_up_lightblue.gif');"></a><a href="00676.html" target="topic"><img src="btn_next_lightblue.gif" border="0" alt="Next" title="Next" onmouseover="switchImage(this, 'btn_next_lightblue_hover.gif');" onmouseout="switchImage(this, 'btn_next_lightblue.gif');"></a></div>
</td></tr></table><div class="Element5">
A.7.5 System timing checks</div>
</div>
</div>
<!-- End Page Header -->
<!-- Begin Client Area -->
<div class="Element720" id="areascroll">
<div class="Element721">
<!-- Begin Page Content -->
<div class="Element58">
<a name="Group"></a><div class="Element14">
<a onclick="toggleVisibilityStored('Group');" class="a_Element14"><img src="sectionminus.png" border="0" alt="" title="" id="imgGroup">Group</a></div>
<div id="divGroup">
<div class="Element11">
<div class="Element10">
<p class="Element10">
<a href="00670.html" target="topic">A.7 Specify section</a></p></div>
</div>
</div>
<a name="主题"></a><div class="Element14">
<a onclick="toggleVisibilityStored('主题');" class="a_Element14"><img src="sectionminus.png" border="0" alt="" title="" id="img主题">主题</a></div>
<div id="div主题">
<div class="Element11">
<div class="Element10">
<div class="Element212">
<div class="TableDiv">
<table cellspacing="0" class="Table0">
<tr>
<td class="Element200" valign="top" width="50%">
<div class="Element201">
主题 </div></td><td class="Element204" valign="top" width="50%">
<div class="Element205">
描述 </div></td></tr><tr>
<td class="Element202" valign="top" width="50%">
<div class="Element203">
<a href="00676.html" target="topic">A.7.5.1 System timing check commands</a> </div></td><td class="Element206" valign="top" width="50%">
<div class="Element207">
system_timing_check ::=<br>$setup_timing_check<br>| $hold_timing_check<br>| $setuphold_timing_check<br>| $recovery_timing_check<br>| $removal_timing_check<br>| $recrem_timing_check<br>| $skew_timing_check<br>| $timeskew_timing_check<br>| $fullskew_timing_check<br>| $period_timing_check<br>| $width_timing_check<br>| $nochange_timing_check<br>$setup_timing_check ::=<br>$setup ( data_event , reference_event , timing_check_limit [ , [ notifier ] ] ) ;<br>$hold_timing_check ::=<br>$hold ( reference_event , data_event , timing_check_limit [ , [ notifier ] ] ) ;<br>$setuphold_timing_check ::=<br>$setuphold ( reference_event , data_event , timing_check_limit , timing_check_limit<br>[ , [ notifier ] [ , [ stamptime_condition ] [ , [ checktime_condition ]<br>[ , [ delayed_reference ] [ , [ delayed_data ] ] ] ] ] ]... <a href="00676.html" target="topic">more</a> </div></td></tr><tr>
<td class="Element202" valign="top" width="50%">
<div class="Element203">
<a href="00677.html" target="topic">A.7.5.2 System timing check command arguments</a> </div></td><td class="Element206" valign="top" width="50%">
<div class="Element207">
checktime_condition ::= mintypmax_expression<br>controlled_reference_event ::= controlled_timing_check_event<br>data_event ::= timing_check_event<br>delayed_data ::=<br>terminal_identifier<br>| terminal_identifier [ constant_mintypmax_expression ]<br>delayed_reference ::=<br>terminal_identifier<br>| terminal_identifier [ constant_mintypmax_expression ]<br>end_edge_offset ::= mintypmax_expression<br>event_based_flag ::= constant_expression<br>notifier ::= variable_identifier<br>reference_event ::= timing_check_event<br>remain_active_flag ::= constant_mintypmax_expression<br>stamptime_condition ::= mintypmax_expression<br>start_edge_offset ::= mintypmax_expression<br>threshold ::=constant_expression<br>timing_check_limit ::= expression </div></td></tr><tr>
<td class="Element202" valign="top" width="50%">
<div class="Element203">
<a href="00678.html" target="topic">A.7.5.3 System timing check event definitions</a> </div></td><td class="Element206" valign="top" width="50%">
<div class="Element207">
timing_check_event ::=<br>[timing_check_event_control] specify_terminal_descriptor [ &&& timing_check_condition ]<br>controlled_timing_check_event ::=<br>timing_check_event_control specify_terminal_descriptor [ &&& timing_check_condition ]<br>timing_check_event_control ::=<br>posedge<br>| negedge<br>| edge_control_specifier<br>specify_terminal_descriptor ::=<br>specify_input_terminal_descriptor<br>| specify_output_terminal_descriptor<br>edge_control_specifier ::= edge [ edge_descriptor { , edge_descriptor } ]<br>edge_descriptor1 ::= 01 | 10 | z_or_x zero_or_one | zero_or_one z_or_x<br>zero_or_one ::= 0 | 1<br>z_or_x ::= x | X | z | Z<br>timing_check_condition ::=<br>scalar_timing_check_condition<br>| ( scalar_timing_check_condition )<br>scalar_timing_check_condition ::=<br>expression<br>| ~ expression<br>| expression == scalar_constant<br>| expression === scalar_constant<br>| expression != scalar_constant<br>| expression !== scalar_constant<br>scalar_constant ::= 1’b0 | 1’b1 | 1’B0 |... <a href="00678.html" target="topic">more</a> </div></td></tr></table></div></div>
</div>
</div>
</div>
<a name="Links"></a><div class="Element14">
<a onclick="toggleVisibilityStored('链接');" class="a_Element14"><img src="sectionminus.png" border="0" alt="" title="" id="img链接">链接</a></div>
<div id="div链接">
<div class="Element11">
<div class="Element10">
<a href="00670.html" target="topic">A.7 Specify section</a>, <a href="01022.html" target="topic">主题</a></div>
</div>
</div>
</div>
<!-- End Page Content -->
<!-- Begin Page Footer -->
<hr width="98%" align="center" size="1" color="#CCCCCC" />
<table align="center" cellpadding="0" cellspacing="0" border="0">
<tbody>
<tr height="10">
<td></td>
</tr>
<tr align="center">
<td>
<script type="text/javascript"><!--
google_ad_client = "pub-5266859600380184";
google_ad_width = 468;
google_ad_height = 60;
google_ad_format = "468x60_as";
google_ad_type = "text_image";
google_ad_channel ="";
google_page_url = document.location;
//--></script>
<script type="text/javascript"
src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script>
</td>
</tr>
<tr height="15">
<td></td>
</tr>
<tr align="center">
<td>
<font size=2>除非特别声明，原文版权归作者所有，如有转摘请注明原作者以及译者（<a href="http://www.fpgatech.net/" target="_blank">FPGA技术网</a>）信息。<br />
如果您对本主题有何建议或意见，请登陆<a href="http://www.fpgatech.net/forum/forumdisplay.php?fid=18" target="_blank">FPGA开发者家园</a>提交，您的参与是我们前进的动力。</font>
<script language="javascript" type="text/javascript" src="http://js.users.51.la/195685.js"></script>
<noscript><a href="http://www.51.la/?195685" target="_blank"><img alt="我要啦免费统计" src="http://img.users.51.la/195685.asp" style="border:none" /></a></noscript>
</td>
</tr>
</tbody>
</table>
<!-- End Page Footer -->
</div>
</div>
<!-- End Client Area -->
</body></html>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -