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📁 介绍asci设计的一本书
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1234 
 </A>

	tipd_I 							: VitalDelayType01  := (0 ns, 0 ns);</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63380">

 </A>

	tpd_I_ZN 							: VitalDelayType01  := (0 ns, 0 ns) );</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63381">

 </A>

	<B CLASS="Keyword">

port</B>

 (</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63382">

 </A>

	I 					: <B CLASS="Keyword">

in</B>

 STD_LOGIC := 'U'; </P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63383">

 </A>

	ZN 					: <B CLASS="Keyword">

out</B>

 STD_LOGIC := 'U' );</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63384">

 </A>

<B CLASS="Keyword">

attribute</B>

 VITAL_LEVEL0 <B CLASS="Keyword">

of</B>

 IN01D1 : <B CLASS="Keyword">

entity</B>

 <B CLASS="Keyword">

is</B>

 TRUE;</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63385">

 </A>

<B CLASS="Keyword">

end</B>

 IN01D1;</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63386">

 </A>

<B CLASS="Keyword">

architecture</B>

 IN01D1 <B CLASS="Keyword">

of</B>

 IN01D1 <B CLASS="Keyword">

is</B>

 </P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63387">

 </A>

<B CLASS="Keyword">

attribute</B>

 VITAL_LEVEL1 <B CLASS="Keyword">

of</B>

 IN01D1 : <B CLASS="Keyword">

architecture</B>

 <B CLASS="Keyword">

is</B>

 TRUE;</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63388">

 </A>

<B CLASS="Keyword">

signal</B>

 I_ipd 						: STD_LOGIC := 'X';</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63389">

 </A>

<B CLASS="Keyword">

begin</B>

 </P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63390">

 </A>

WIREDELAY:<B CLASS="Keyword">

block</B>

</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63391">

 </A>

	<B CLASS="Keyword">

begin</B>

 VitalWireDelay(I_ipd, I, tipd_I); <B CLASS="Keyword">

end</B>

 <B CLASS="Keyword">

block</B>

;</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63392">

 </A>

VITALbehavior : <B CLASS="Keyword">

process</B>

 (I_ipd)</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63393">

 </A>

<B CLASS="Keyword">

variable</B>

 ZN_zd 											: STD_LOGIC;</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63394">

 </A>

<B CLASS="Keyword">

variable</B>

 ZN_GlitchData 											: VitalGlitchDataType;</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63395">

 </A>

<B CLASS="Keyword">

begin</B>

 </P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63396">

 </A>

ZN_zd := VitalINV(I_ipd);</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63397">

 </A>

VitalPathDelay01(</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63398">

 </A>

	OutSignal 							=&gt; ZN,</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63399">

 </A>

	OutSignalName 							=&gt; &quot;ZN&quot;,</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63400">

 </A>

	OutTemp 							=&gt; ZN_zd,</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63401">

 </A>

	Paths 							=&gt; (0 =&gt; (I_ipd'LAST_EVENT, tpd_I_ZN, TRUE)),</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63402">

 </A>

	GlitchData 							=&gt; ZN_GlitchData,</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63403">

 </A>

	DefaultDelay 							=&gt; VitalZeroDelay01,</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63404">

 </A>

	Mode 							=&gt; OnEvent,</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63405">

 </A>

	MsgOn 							=&gt; FALSE,</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63406">

 </A>

	XOn 							=&gt; TRUE,</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63407">

 </A>

	MsgSeverity 							=&gt; ERROR);</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63408">

 </A>

	<B CLASS="Keyword">

end</B>

 <B CLASS="Keyword">

process</B>

;</P>

<P CLASS="ComputerLastLabel">

<A NAME="pgfId=63409">

 </A>

<B CLASS="Keyword">

end</B>

 IN01D1;</P>

<P CLASS="Body">

<A NAME="pgfId=67783">

 </A>

The following testbench, <SPAN CLASS="BodyComputer">

SDF_testbench</SPAN>

, contains an entity, <SPAN CLASS="BodyComputer">

SDF</SPAN>

, that in turn instantiates a copy of an inverter, <SPAN CLASS="BodyComputer">

in01d1</SPAN>

:</P>

<P CLASS="ComputerFirstLabel">

<A NAME="pgfId=67538">

 </A>

<B CLASS="Keyword">

library</B>

 IEEE; <B CLASS="Keyword">

use</B>

 IEEE.STD_LOGIC_1164.<B CLASS="Keyword">

all</B>

;</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63411">

 </A>

<B CLASS="Keyword">

entity</B>

 SDF <B CLASS="Keyword">

is</B>

 <B CLASS="Keyword">

port</B>

 ( A : <B CLASS="Keyword">

in</B>

 STD_LOGIC; B : <B CLASS="Keyword">

out</B>

 STD_LOGIC );</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63412">

 </A>

<B CLASS="Keyword">

end</B>

 SDF;</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63413">

 </A>

<B CLASS="Keyword">

architecture</B>

 SDF <B CLASS="Keyword">

of</B>

 SDF <B CLASS="Keyword">

is</B>

</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63414">

 </A>

<B CLASS="Keyword">

component</B>

 in01d1 <B CLASS="Keyword">

port</B>

 ( I : <B CLASS="Keyword">

in</B>

 STD_LOGIC; ZN : <B CLASS="Keyword">

out</B>

 STD_LOGIC ); </P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63415">

 </A>

<B CLASS="Keyword">

end</B>

 <B CLASS="Keyword">

component</B>

;</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63416">

 </A>

<B CLASS="Keyword">

	begin</B>

<A NAME="20214">

 </A>

 i1: in01d1 <B CLASS="Keyword">

port</B>

 <B CLASS="Keyword">

map</B>

 ( I =&gt; A, ZN =&gt; B);</P>

<P CLASS="ComputerLastLabel">

<A NAME="pgfId=63417">

 </A>

<B CLASS="Keyword">

end</B>

 SDF;</P>

<P CLASS="ComputerFirstLabel">

<A NAME="pgfId=63418">

 </A>

<B CLASS="Keyword">

library</B>

 STD; <B CLASS="Keyword">

use</B>

 STD.TEXTIO.<B CLASS="Keyword">

all</B>

;</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63419">

 </A>

<B CLASS="Keyword">

library</B>

 IEEE; <B CLASS="Keyword">

use</B>

 IEEE.STD_LOGIC_1164.<B CLASS="Keyword">

all</B>

;</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63420">

 </A>

<B CLASS="Keyword">

entity</B>

 SDF_testbench <B CLASS="Keyword">

is</B>

 <B CLASS="Keyword">

end</B>

 SDF_testbench;</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63421">

 </A>

<B CLASS="Keyword">

architecture</B>

 SDF_testbench <B CLASS="Keyword">

of</B>

 SDF_testbench <B CLASS="Keyword">

is</B>

</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63422">

 </A>

<B CLASS="Keyword">

component</B>

 SDF <B CLASS="Keyword">

port</B>

 ( A : <B CLASS="Keyword">

in</B>

 STD_LOGIC; B : <B CLASS="Keyword">

out</B>

 STD_LOGIC );</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63423">

 </A>

<B CLASS="Keyword">

end</B>

 <B CLASS="Keyword">

component</B>

;</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63424">

 </A>

<B CLASS="Keyword">

signal</B>

 A, B : STD_LOGIC := '0';</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63425">

 </A>

<B CLASS="Keyword">

begin</B>

 </P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63426">

 </A>

<A NAME="34309">

 </A>

	SDF_b : SDF<B CLASS="Keyword">

 port</B>

 <B CLASS="Keyword">

map</B>

 ( A =&gt; A, B =&gt; B);</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63427">

 </A>

<B CLASS="Keyword">

	process</B>

 <B CLASS="Keyword">

begin </B>

</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63428">

 </A>

<B CLASS="Keyword">

		</B>

A &lt;= '0'; <B CLASS="Keyword">

wait</B>

 <B CLASS="Keyword">

for</B>

 5 ns; A &lt;= '1'; </P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63429">

 </A>

<B CLASS="Keyword">

		wait</B>

 <B CLASS="Keyword">

for</B>

 5 ns; A &lt;= '0'; <B CLASS="Keyword">

wait</B>

; </P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63430">

 </A>

	<B CLASS="Keyword">

end</B>

 <B CLASS="Keyword">

process</B>

;</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63431">

 </A>

	<B CLASS="Keyword">

process</B>

 (A, B) <B CLASS="Keyword">

variable</B>

 L: LINE; <B CLASS="Keyword">

begin</B>

 </P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63432">

 </A>

<A NAME="21686">

 </A>

		write(L, now, right, 10, TIME'(ps)); </P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63433">

 </A>

		write(L, STRING'(&quot; A=&quot;)); write(L, TO_BIT(A)); </P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63434">

 </A>

		write(L, STRING'(&quot; B=&quot;)); write(L, TO_BIT(B));</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63435">

 </A>

		writeline(output, L);</P>

<P CLASS="ComputerLabel">

<A NAME="pgfId=63436">

 </A>

	<B CLASS="Keyword">

end</B>

 <B CLASS="Keyword">

process</B>

;</P>

<P CLASS="ComputerLastLabel">

<A NAME="pgfId=63437">

 </A>

<B CLASS="Keyword">

end</B>

 SDF_testbench;</P>

<P CLASS="Body">

<A NAME="pgfId=67961">

 </A>

Here is an SDF file (<SPAN CLASS="BodyComputer">

SDF_b.sdf</SPAN>

) that contains back-annotation timing information (min/typ/max timing values are identical in this example):</P>

<P CLASS="ComputerFirst">

<A NAME="pgfId=67962">

 </A>

(DELAYFILE</P>

<P CLASS="Computer">

<A NAME="pgfId=67963">

 </A>

	(SDFVERSION &quot;3.0&quot;) (DESIGN &quot;SDF.vhd&quot;) (DATE &quot;Aug-13-96&quot;)</P>

<P CLASS="Computer">

<A NAME="pgfId=67964">

 </A>

	(VENDOR &quot;MJSS&quot;) (PROGRAM &quot;MJSS&quot;) (VERSION &quot;v0&quot;)</P>

<P CLASS="Computer">

<A NAME="pgfId=67965">

 </A>

	(DIVIDER .) (TIMESCALE 1 ns) </P>

<P CLASS="Computer">

<A NAME="pgfId=67966">

 </A>

	(CELL (CELLTYPE &quot;in01d1&quot;)</P>

<P CLASS="Computer">

<A NAME="pgfId=67967">

 </A>

		(INSTANCE i1)</P>

<P CLASS="Computer">

<A NAME="pgfId=67968">

 </A>

		(DELAY (ABSOLUTE</P>

<P CLASS="Computer">

<A NAME="pgfId=67969">

 </A>

			(IOPATH i zn (1.151:1.151:1.151) (1.363:1.363:1.363))</P>

<P CLASS="Computer">

<A NAME="pgfId=67970">

 </A>

			(PORT i (0.021:0.021:0.021) (0.025:0.025:0.025))</P>

<P CLASS="Computer">

<A NAME="pgfId=67971">

 </A>

		))</P>

<P CLASS="Computer">

<A NAME="pgfId=67972">

 </A>

	)</P>

<P CLASS="ComputerLast">
1234

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