📄 sld_virtual_jtag.mht
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</v:shapetype><v:shape id=3D"_x0000_s1026" type=3D"#_x0000_t75" alt=3D"Mega=
functions"
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</v:shape><![endif]--><![if !vml]><img width=3D32 height=3D32
src=3D"sld_virtual_jtag.files/image001.gif" align=3Dleft style=3D'border-bo=
ttom-style:
none;border-left-style:none;border-right-style:none;border-top-style:none;
float:left;height:32px;margin-left:5px;margin-right:5px;width:32px'
alt=3DMegafunctions border=3D0 v:shapes=3D"_x0000_s1026"><![endif]><span
class=3DSpellE><b><span lang=3DEN-US style=3D'font-size:24.0pt;font-family:=
SimSun;
mso-bidi-font-family:SimSun;mso-font-kerning:18.0pt'>sld_virtual_jtag</span=
></b></span><b><span
lang=3DEN-US style=3D'font-size:24.0pt;font-family:SimSun;mso-bidi-font-fam=
ily:
SimSun;mso-font-kerning:18.0pt'> (Virtual JTAG) <span class=3DSpellE>Megafu=
nction</span><o:p></o:p></span></b></p>
<div class=3DMsoNormal align=3Dcenter style=3D'text-align:center;mso-pagina=
tion:widow-orphan'><span
lang=3DEN-US style=3D'font-size:12.0pt;font-family:SimSun;mso-bidi-font-fam=
ily:
SimSun;mso-font-kerning:0pt'>
<hr size=3D2 width=3D"100%" noshade color=3D"#6699ff" align=3Dcenter>
</span></div>
<p class=3DMsoNormal align=3Dleft style=3D'mso-margin-top-alt:auto;mso-marg=
in-bottom-alt:
auto;text-align:left;mso-pagination:widow-orphan'><span class=3DGramE><span
lang=3DEN-US style=3D'font-size:12.0pt;font-family:SimSun;mso-bidi-font-fam=
ily:
SimSun;mso-font-kerning:0pt'>Virtual JTAG <span class=3DSpellE>megafunction=
</span>.</span></span><span
lang=3DEN-US style=3D'font-size:12.0pt;font-family:SimSun;mso-bidi-font-fam=
ily:
SimSun;mso-font-kerning:0pt'> This <span class=3DSpellE>megafunction</span>
provides user access to the PLD core through the JTAG interface. The <span
class=3DSpellE>Quartus</span> II software or JTAG control host identifies e=
ach
instance of this <span class=3DSpellE>megafunction</span> by a unique index=
. Each
<span class=3DSpellE>megafunction</span> instance functions in a flow that
resembles the JTAG operation of a device. The logic that uses this interface
must maintain the continuity of the JTAG chain on behalf the PLD device when
this instance becomes active.<o:p></o:p></span></p>
<p class=3DMsoNormal align=3Dleft style=3D'mso-margin-top-alt:auto;mso-marg=
in-bottom-alt:
auto;text-align:left;mso-pagination:widow-orphan'><span class=3DSpellE><span
lang=3DEN-US style=3D'font-size:12.0pt;font-family:SimSun;mso-bidi-font-fam=
ily:
SimSun;mso-font-kerning:0pt'>Altera</span></span><span lang=3DEN-US
style=3D'font-size:12.0pt;font-family:SimSun;mso-bidi-font-family:SimSun;
mso-font-kerning:0pt'> recommends instantiating this function as described =
in Using
the <span class=3DSpellE>MegaWizard</span> Plug-In Manager.<o:p></o:p></spa=
n></p>
<p class=3DMsoNormal align=3Dleft style=3D'mso-margin-top-alt:auto;mso-marg=
in-bottom-alt:
auto;text-align:left;mso-pagination:widow-orphan'><span lang=3DEN-US
style=3D'font-size:12.0pt;font-family:SimSun;mso-bidi-font-family:SimSun;
mso-font-kerning:0pt'>This topic contains the following information:<o:p></=
o:p></span></p>
<ul type=3Ddisc>
<li class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;
text-align:left;mso-pagination:widow-orphan;mso-list:l0 level1 lfo3;
tab-stops:list 36.0pt'><span lang=3DEN-US style=3D'font-size:12.0pt;
font-family:SimSun;mso-bidi-font-family:SimSun;mso-font-kerning:0pt'><a
href=3D"#AHDL_Function_Prototype">AHDL Function Prototype</a> (also ap=
plies
to <span class=3DSpellE>Verilog</span> HDL) <o:p></o:p></span></li>
<li class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;
text-align:left;mso-pagination:widow-orphan;mso-list:l0 level1 lfo3;
tab-stops:list 36.0pt'><span lang=3DEN-US style=3D'font-size:12.0pt;
font-family:SimSun;mso-bidi-font-family:SimSun;mso-font-kerning:0pt'><a
href=3D"#VHDL_Component_Declaration">VHDL Component Declaration</a> <o=
:p></o:p></span></li>
<li class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;
text-align:left;mso-pagination:widow-orphan;mso-list:l0 level1 lfo3;
tab-stops:list 36.0pt'><span lang=3DEN-US style=3D'font-size:12.0pt;
font-family:SimSun;mso-bidi-font-family:SimSun;mso-font-kerning:0pt'><a
href=3D"#VHDL_LIBRARY-USE_Declaration">VHDL LIBRARY-USE Declaration</a=
> (not
required if the VHDL Component Declaration is used) <o:p></o:p></span>=
</li>
<li class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;
text-align:left;mso-pagination:widow-orphan;mso-list:l0 level1 lfo3;
tab-stops:list 36.0pt'><span lang=3DEN-US style=3D'font-size:12.0pt;
font-family:SimSun;mso-bidi-font-family:SimSun;mso-font-kerning:0pt'><a
href=3D"#Ports">Port Descriptions</a> <o:p></o:p></span></li>
<li class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;
text-align:left;mso-pagination:widow-orphan;mso-list:l0 level1 lfo3;
tab-stops:list 36.0pt'><span lang=3DEN-US style=3D'font-size:12.0pt;
font-family:SimSun;mso-bidi-font-family:SimSun;mso-font-kerning:0pt'><a
href=3D"#Parameters">Parameter Descriptions</a> <o:p></o:p></span></li>
</ul>
<p class=3DMsoNormal align=3Dleft style=3D'mso-margin-top-alt:auto;mso-marg=
in-bottom-alt:
auto;text-align:left;mso-pagination:widow-orphan'><span lang=3DEN-US
style=3D'font-size:12.0pt;font-family:SimSun;mso-bidi-font-family:SimSun;
mso-font-kerning:0pt'> <o:p></o:p></span></p>
<p class=3DMsoNormal align=3Dleft style=3D'mso-margin-top-alt:auto;mso-marg=
in-bottom-alt:
auto;text-align:left;mso-pagination:widow-orphan;mso-outline-level:3'><a
name=3D"AHDL_Function_Prototype"><b><span lang=3DEN-US style=3D'font-size:1=
3.5pt;
font-family:SimSun;mso-bidi-font-family:SimSun;mso-font-kerning:0pt'>AHDL
Function Prototype (port name and order also apply to </span></b></a><span
class=3DSpellE><span style=3D'mso-bookmark:AHDL_Function_Prototype'><b><span
lang=3DEN-US style=3D'font-size:13.5pt;font-family:SimSun;mso-bidi-font-fam=
ily:
SimSun;mso-font-kerning:0pt'>Verilog</span></b></span></span><span
style=3D'mso-bookmark:AHDL_Function_Prototype'><b><span lang=3DEN-US
style=3D'font-size:13.5pt;font-family:SimSun;mso-bidi-font-family:SimSun;
mso-font-kerning:0pt'> HDL):</span></b></span><b><span lang=3DEN-US
style=3D'font-size:13.5pt;font-family:SimSun;mso-bidi-font-family:SimSun;
mso-font-kerning:0pt'><o:p></o:p></span></b></p>
<p class=3DMsoNormal align=3Dleft style=3D'mso-margin-top-alt:auto;mso-marg=
in-bottom-alt:
auto;text-align:left;mso-pagination:widow-orphan;tab-stops:45.8pt 91.6pt 13=
7.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6=
pt 595.4pt 641.2pt 687.0pt 732.8pt'><span
lang=3DEN-US style=3D'font-size:12.0pt;font-family:"Courier New";mso-font-k=
erning:
0pt'>FUNCTION <span class=3DSpellE>sld_virtual_<span class=3DGramE>jtag</sp=
an></span><span
class=3DGramE>(</span><span class=3DSpellE>ir_out</span>[sld_ir_width-1..0]=
, <span
class=3DSpellE>tdo</span>)<o:p></o:p></span></p>
<p class=3DMsoNormal align=3Dleft style=3D'mso-margin-top-alt:auto;mso-marg=
in-bottom-alt:
auto;text-align:left;mso-pagination:widow-orphan;tab-stops:45.8pt 91.6pt 13=
7.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6=
pt 595.4pt 641.2pt 687.0pt 732.8pt'><span
lang=3DEN-US style=3D'font-size:12.0pt;font-family:"Courier New";mso-font-k=
erning:
0pt'><span style=3D'mso-spacerun:yes'> </span> <span
class=3DGramE>WITH(</span><span class=3DSpellE>lpm_hint</span>, <span class=
=3DSpellE>lpm_type</span>,
<span class=3DSpellE>sld_auto_instance_index</span>, <span class=3DSpellE>s=
ld_instance_index</span>,<o:p></o:p></span></p>
<p class=3DMsoNormal align=3Dleft style=3D'mso-margin-top-alt:auto;mso-marg=
in-bottom-alt:
auto;text-align:left;mso-pagination:widow-orphan;tab-stops:45.8pt 91.6pt 13=
7.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6=
pt 595.4pt 641.2pt 687.0pt 732.8pt'><span
lang=3DEN-US style=3D'font-size:12.0pt;font-family:"Courier New";mso-font-k=
erning:
0pt'><span
style=3D'mso-spacerun:yes'> </span>  =
; <span
class=3DSpellE>sld_ir_width</span>, <span class=3DSpellE>sld_sim_action</sp=
an>, <span
class=3DSpellE>sld_sim_n_scan</span>, <span class=3DSpellE>sld_sim_total_le=
ngth</span>)<o:p></o:p></span></p>
<p class=3DMsoNormal align=3Dleft style=3D'mso-margin-top-alt:auto;mso-marg=
in-bottom-alt:
auto;text-align:left;mso-pagination:widow-orphan;tab-stops:45.8pt 91.6pt 13=
7.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6=
pt 595.4pt 641.2pt 687.0pt 732.8pt'><span
lang=3DEN-US style=3D'font-size:12.0pt;font-family:"Courier New";mso-font-k=
erning:
0pt'><span style=3D'mso-spacerun:yes'> </span> <span
class=3DGramE>RETURNS(</span><span class=3DSpellE>ir_in</span>[sld_ir_width=
-1..0], <span
class=3DSpellE>jtag_state_cdr</span>, <span class=3DSpellE>jtag_state_cir</=
span>, jtag_state_e1dr,<o:p></o:p></span></p>
<p class=3DMsoNormal align=3Dleft style=3D'mso-margin-top-alt:auto;mso-marg=
in-bottom-alt:
auto;text-align:left;mso-pagination:widow-orphan;tab-stops:45.8pt 91.6pt 13=
7.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6=
pt 595.4pt 641.2pt 687.0pt 732.8pt'><span
lang=3DEN-US style=3D'font-size:12.0pt;font-family:"Courier New";mso-font-k=
erning:
0pt'><span
style=3D'mso-spacerun:yes'> </span>  =
; jtag_state_e1ir,
jtag_state_e2dr, jtag_state_e2ir, <span class=3DSpellE>jtag_state_pdr</span=
>, <span
class=3DSpellE>jtag_state_pir</span>,<o:p></o:p></span></p>
<p class=3DMsoNormal align=3Dleft style=3D'mso-margin-top-alt:auto;mso-marg=
in-bottom-alt:
auto;text-align:left;mso-pagination:widow-orphan;tab-stops:45.8pt 91.6pt 13=
7.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6=
pt 595.4pt 641.2pt 687.0pt 732.8pt'><span
lang=3DEN-US style=3D'font-size:12.0pt;font-family:"Courier New";mso-font-k=
erning:
0pt'><span
style=3D'mso-spacerun:yes'> </span>  =
; <span
class=3DSpellE>jtag_state_rti</span>, <span class=3DSpellE>jtag_state_sdr</=
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