فایل مزیت های ميكروكنترلر 8051

توضیحات تکمیلی

فایل مزیت های ميكروكنترلر 8051 v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} Normal 0 false false false EN-US X-NONE FA MicrosoftInternetExplorer4 <w:LatentStyles DefLockedState='false' DefUnhideWhenUsed='true' DefSemiHidden='true' DefQFormat='false' DefPriority='99' LatentStyleCount='267'> <w:LsdException Locked='false' Priority='0' SemiHidden='false' UnhideWhenUsed='false' QFormat='true' Name='Normal'/> <w:LsdException Locked='false' Priority='0' SemiHidden='false' UnhideWhenUsed='false' QFormat='true' Name='heading 1'/> <w:LsdException Locked='false' Priority='10' SemiHidden='false' UnhideWhenUsed='false' QFormat='true' Name='Title'/> <w:LsdException Locked='false' Priority='11' SemiHidden='false' UnhideWhenUsed='false' QFormat='true' Name='Subtitle'/> <w:LsdException Locked='false' Priority='22' SemiHidden='false' UnhideWhenUsed='false' QFormat='true' Name='Strong'/> <w:LsdException Locked='false' Priority='20' SemiHidden='false' UnhideWhenUsed='false' QFormat='true' Name='Emphasis'/> <w:LsdException Locked='false' Priority='59' SemiHidden='false' UnhideWhenUsed='false' Name='Table Grid'/> <w:LsdException Locked='false' Priority='1' SemiHidden='false' UnhideWhenUsed='false' QFormat='true' Name='No Spacing'/> <w:LsdException Locked='false' Priority='60' SemiHidden='false' UnhideWhenUsed='false' Name='Light Shading'/> <w:LsdException Locked='false' Priority='61' SemiHidden='false' UnhideWhenUsed='false' Name='Light List'/> <w:LsdException Locked='false' Priority='62' SemiHidden='false' UnhideWhenUsed='false' Name='Light Grid'/> <w:LsdException Locked='false' Priority='63' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Shading 1'/> <w:LsdException Locked='false' Priority='64' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Shading 2'/> <w:LsdException Locked='false' Priority='65' SemiHidden='false' UnhideWhenUsed='false' Name='Medium List 1'/> <w:LsdException Locked='false' Priority='66' SemiHidden='false' UnhideWhenUsed='false' Name='Medium List 2'/> <w:LsdException Locked='false' Priority='67' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Grid 1'/> <w:LsdException Locked='false' Priority='68' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Grid 2'/> <w:LsdException Locked='false' Priority='69' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Grid 3'/> <w:LsdException Locked='false' Priority='70' SemiHidden='false' UnhideWhenUsed='false' Name='Dark List'/> <w:LsdException Locked='false' Priority='71' SemiHidden='false' UnhideWhenUsed='false' Name='Colorful Shading'/> <w:LsdException Locked='false' Priority='72' SemiHidden='false' UnhideWhenUsed='false' Name='Colorful List'/> <w:LsdException Locked='false' Priority='73' SemiHidden='false' UnhideWhenUsed='false' Name='Colorful Grid'/> <w:LsdException Locked='false' Priority='60' SemiHidden='false' UnhideWhenUsed='false' Name='Light Shading Accent 1'/> <w:LsdException Locked='false' Priority='61' SemiHidden='false' UnhideWhenUsed='false' Name='Light List Accent 1'/> <w:LsdException Locked='false' Priority='62' SemiHidden='false' UnhideWhenUsed='false' Name='Light Grid Accent 1'/> <w:LsdException Locked='false' Priority='63' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Shading 1 Accent 1'/> <w:LsdException Locked='false' Priority='64' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Shading 2 Accent 1'/> <w:LsdException Locked='false' Priority='65' SemiHidden='false' UnhideWhenUsed='false' Name='Medium List 1 Accent 1'/> <w:LsdException Locked='false' Priority='34' SemiHidden='false' UnhideWhenUsed='false' QFormat='true' Name='List Paragraph'/> <w:LsdException Locked='false' Priority='29' SemiHidden='false' UnhideWhenUsed='false' QFormat='true' Name='Quote'/> <w:LsdException Locked='false' Priority='30' SemiHidden='false' UnhideWhenUsed='false' QFormat='true' Name='Intense Quote'/> <w:LsdException Locked='false' Priority='66' SemiHidden='false' UnhideWhenUsed='false' Name='Medium List 2 Accent 1'/> <w:LsdException Locked='false' Priority='67' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Grid 1 Accent 1'/> <w:LsdException Locked='false' Priority='68' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Grid 2 Accent 1'/> <w:LsdException Locked='false' Priority='69' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Grid 3 Accent 1'/> <w:LsdException Locked='false' Priority='70' SemiHidden='false' UnhideWhenUsed='false' Name='Dark List Accent 1'/> <w:LsdException Locked='false' Priority='71' SemiHidden='false' UnhideWhenUsed='false' Name='Colorful Shading Accent 1'/> <w:LsdException Locked='false' Priority='72' SemiHidden='false' UnhideWhenUsed='false' Name='Colorful List Accent 1'/> <w:LsdException Locked='false' Priority='73' SemiHidden='false' UnhideWhenUsed='false' Name='Colorful Grid Accent 1'/> <w:LsdException Locked='false' Priority='60' SemiHidden='false' UnhideWhenUsed='false' Name='Light Shading Accent 2'/> <w:LsdException Locked='false' Priority='61' SemiHidden='false' UnhideWhenUsed='false' Name='Light List Accent 2'/> <w:LsdException Locked='false' Priority='62' SemiHidden='false' UnhideWhenUsed='false' Name='Light Grid Accent 2'/> <w:LsdException Locked='false' Priority='63' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Shading 1 Accent 2'/> <w:LsdException Locked='false' Priority='64' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Shading 2 Accent 2'/> <w:LsdException Locked='false' Priority='65' SemiHidden='false' UnhideWhenUsed='false' Name='Medium List 1 Accent 2'/> <w:LsdException Locked='false' Priority='66' SemiHidden='false' UnhideWhenUsed='false' Name='Medium List 2 Accent 2'/> <w:LsdException Locked='false' Priority='67' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Grid 1 Accent 2'/> <w:LsdException Locked='false' Priority='68' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Grid 2 Accent 2'/> <w:LsdException Locked='false' Priority='69' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Grid 3 Accent 2'/> <w:LsdException Locked='false' Priority='70' SemiHidden='false' UnhideWhenUsed='false' Name='Dark List Accent 2'/> <w:LsdException Locked='false' Priority='71' SemiHidden='false' UnhideWhenUsed='false' Name='Colorful Shading Accent 2'/> <w:LsdException Locked='false' Priority='72' SemiHidden='false' UnhideWhenUsed='false' Name='Colorful List Accent 2'/> <w:LsdException Locked='false' Priority='73' SemiHidden='false' UnhideWhenUsed='false' Name='Colorful Grid Accent 2'/> <w:LsdException Locked='false' Priority='60' SemiHidden='false' UnhideWhenUsed='false' Name='Light Shading Accent 3'/> <w:LsdException Locked='false' Priority='61' SemiHidden='false' UnhideWhenUsed='false' Name='Light List Accent 3'/> <w:LsdException Locked='false' Priority='62' SemiHidden='false' UnhideWhenUsed='false' Name='Light Grid Accent 3'/> <w:LsdException Locked='false' Priority='63' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Shading 1 Accent 3'/> <w:LsdException Locked='false' Priority='64' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Shading 2 Accent 3'/> <w:LsdException Locked='false' Priority='65' SemiHidden='false' UnhideWhenUsed='false' Name='Medium List 1 Accent 3'/> <w:LsdException Locked='false' Priority='66' SemiHidden='false' UnhideWhenUsed='false' Name='Medium List 2 Accent 3'/> <w:LsdException Locked='false' Priority='67' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Grid 1 Accent 3'/> <w:LsdException Locked='false' Priority='68' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Grid 2 Accent 3'/> <w:LsdException Locked='false' Priority='69' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Grid 3 Accent 3'/> <w:LsdException Locked='false' Priority='70' SemiHidden='false' UnhideWhenUsed='false' Name='Dark List Accent 3'/> <w:LsdException Locked='false' Priority='71' SemiHidden='false' UnhideWhenUsed='false' Name='Colorful Shading Accent 3'/> <w:LsdException Locked='false' Priority='72' SemiHidden='false' UnhideWhenUsed='false' Name='Colorful List Accent 3'/> <w:LsdException Locked='false' Priority='73' SemiHidden='false' UnhideWhenUsed='false' Name='Colorful Grid Accent 3'/> <w:LsdException Locked='false' Priority='60' SemiHidden='false' UnhideWhenUsed='false' Name='Light Shading Accent 4'/> <w:LsdException Locked='false' Priority='61' SemiHidden='false' UnhideWhenUsed='false' Name='Light List Accent 4'/> <w:LsdException Locked='false' Priority='62' SemiHidden='false' UnhideWhenUsed='false' Name='Light Grid Accent 4'/> <w:LsdException Locked='false' Priority='63' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Shading 1 Accent 4'/> <w:LsdException Locked='false' Priority='64' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Shading 2 Accent 4'/> <w:LsdException Locked='false' Priority='65' SemiHidden='false' UnhideWhenUsed='false' Name='Medium List 1 Accent 4'/> <w:LsdException Locked='false' Priority='66' SemiHidden='false' UnhideWhenUsed='false' Name='Medium List 2 Accent 4'/> <w:LsdException Locked='false' Priority='67' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Grid 1 Accent 4'/> <w:LsdException Locked='false' Priority='68' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Grid 2 Accent 4'/> <w:LsdException Locked='false' Priority='69' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Grid 3 Accent 4'/> <w:LsdException Locked='false' Priority='70' SemiHidden='false' UnhideWhenUsed='false' Name='Dark List Accent 4'/> <w:LsdException Locked='false' Priority='71' SemiHidden='false' UnhideWhenUsed='false' Name='Colorful Shading Accent 4'/> <w:LsdException Locked='false' Priority='72' SemiHidden='false' UnhideWhenUsed='false' Name='Colorful List Accent 4'/> <w:LsdException Locked='false' Priority='73' SemiHidden='false' UnhideWhenUsed='false' Name='Colorful Grid Accent 4'/> <w:LsdException Locked='false' Priority='60' SemiHidden='false' UnhideWhenUsed='false' Name='Light Shading Accent 5'/> <w:LsdException Locked='false' Priority='61' SemiHidden='false' UnhideWhenUsed='false' Name='Light List Accent 5'/> <w:LsdException Locked='false' Priority='62' SemiHidden='false' UnhideWhenUsed='false' Name='Light Grid Accent 5'/> <w:LsdException Locked='false' Priority='63' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Shading 1 Accent 5'/> <w:LsdException Locked='false' Priority='64' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Shading 2 Accent 5'/> <w:LsdException Locked='false' Priority='65' SemiHidden='false' UnhideWhenUsed='false' Name='Medium List 1 Accent 5'/> <w:LsdException Locked='false' Priority='66' SemiHidden='false' UnhideWhenUsed='false' Name='Medium List 2 Accent 5'/> <w:LsdException Locked='false' Priority='67' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Grid 1 Accent 5'/> <w:LsdException Locked='false' Priority='68' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Grid 2 Accent 5'/> <w:LsdException Locked='false' Priority='69' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Grid 3 Accent 5'/> <w:LsdException Locked='false' Priority='70' SemiHidden='false' UnhideWhenUsed='false' Name='Dark List Accent 5'/> <w:LsdException Locked='false' Priority='71' SemiHidden='false' UnhideWhenUsed='false' Name='Colorful Shading Accent 5'/> <w:LsdException Locked='false' Priority='72' SemiHidden='false' UnhideWhenUsed='false' Name='Colorful List Accent 5'/> <w:LsdException Locked='false' Priority='73' SemiHidden='false' UnhideWhenUsed='false' Name='Colorful Grid Accent 5'/> <w:LsdException Locked='false' Priority='60' SemiHidden='false' UnhideWhenUsed='false' Name='Light Shading Accent 6'/> <w:LsdException Locked='false' Priority='61' SemiHidden='false' UnhideWhenUsed='false' Name='Light List Accent 6'/> <w:LsdException Locked='false' Priority='62' SemiHidden='false' UnhideWhenUsed='false' Name='Light Grid Accent 6'/> <w:LsdException Locked='false' Priority='63' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Shading 1 Accent 6'/> <w:LsdException Locked='false' Priority='64' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Shading 2 Accent 6'/> <w:LsdException Locked='false' Priority='65' SemiHidden='false' UnhideWhenUsed='false' Name='Medium List 1 Accent 6'/> <w:LsdException Locked='false' Priority='66' SemiHidden='false' UnhideWhenUsed='false' Name='Medium List 2 Accent 6'/> <w:LsdException Locked='false' Priority='67' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Grid 1 Accent 6'/> <w:LsdException Locked='false' Priority='68' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Grid 2 Accent 6'/> <w:LsdException Locked='false' Priority='69' SemiHidden='false' UnhideWhenUsed='false' Name='Medium Grid 3 Accent 6'/> <w:LsdException Locked='false' Priority='70' SemiHidden='false' UnhideWhenUsed='false' Name='Dark List Accent 6'/> <w:LsdException Locked='false' Priority='71' SemiHidden='false' UnhideWhenUsed='false' Name='Colorful Shading Accent 6'/> <w:LsdException Locked='false' Priority='72' SemiHidden='false' UnhideWhenUsed='false' Name='Colorful List Accent 6'/> <w:LsdException Locked='false' Priority='73' SemiHidden='false' UnhideWhenUsed='false' Name='Colorful Grid Accent 6'/> <w:LsdException Locked='false' Priority='19' SemiHidden='false' UnhideWhenUsed='false' QFormat='true' Name='Subtle Emphasis'/> <w:LsdException Locked='false' Priority='21' SemiHidden='false' UnhideWhenUsed='false' QFormat='true' Name='Intense Emphasis'/> <w:LsdException Locked='false' Priority='31' SemiHidden='false' UnhideWhenUsed='false' QFormat='true' Name='Subtle Reference'/> <w:LsdException Locked='false' Priority='32' SemiHidden='false' UnhideWhenUsed='false' QFormat='true' Name='Intense Reference'/> <w:LsdException Locked='false' Priority='33' SemiHidden='false' UnhideWhenUsed='false' QFormat='true' Name='Book Title'/> /* Style Definitions */ table.MsoNormalTable {mso-style-name:'Table Normal'; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:''; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:'Times New Roman','serif'; mso-bidi-font-family:'Traditional Arabic';} <p class='MsoNormal' dir='RTL' style='text-align:justify;text-justify:kashida; text-kashida:0%;line-height:150%'><span dir='LTR' style='font-size:20.0pt; mso-bidi-font-size:16.0pt;line-height:150%;mso-bidi-font-family:Lotus'>8051<span style='font-size:16.0pt; mso-ansi-font-size:20.0pt;line-height:150%;font-family:Lotus'> <p class='MsoNormal' dir='RTL' style='text-align:justify;text-justify:kashida; text-kashida:0%;line-height:150%'><span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'> در سال 1981 شركت اينتل ميكروكنترلر 8 بيتي خود را با نام <span dir='LTR' style='font-size:16.0pt;line-height:150%; mso-bidi-font-family:Lotus'>8051<span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'> معرفي كرد كه داراي 128 بايت <span dir='LTR' style='font-size:16.0pt; line-height:150%;mso-bidi-font-family:Lotus'>RAM<span style='font-size:16.0pt;line-height:150%; font-family:Lotus' lang='AR-SA'>، 4 كيلو بايت ROM<span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'>، دو تايمر، يك درگاه سريال و 4 درگاه كه تماماً بر روي يك تراشه بود. <span dir='LTR' style='font-size:16.0pt; line-height:150%;mso-bidi-font-family:Lotus'>8051 يك ريزپردازنده 8 بيتي است به اين معني كه CPU<span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'> آن در هر بار مي تواند فقط بر روي 8 بيت داده كار كند و داده هاي بزرگتر بايد به قسمتهاي 8 بيتي شكسته شود. <p class='MsoNormal' dir='RTL' style='text-align:justify;text-justify:kashida; text-kashida:0%;line-height:150%'><span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'> پس از اينكه اينتل اجازة ساخت و فروش 8051<span style='font-size:16.0pt;line-height:150%; font-family:Lotus' lang='AR-SA'> را با شرط حفظ سازگاري كد با 8051<span style='font-size:16.0pt;line-height:150%; font-family:Lotus' lang='AR-SA'> به سازنده گان ديگر داد، 8051<span style='font-size:16.0pt;line-height:150%; font-family:Lotus' lang='AR-SA'> از محبوبيت زيادي برخوردار شد. <p class='MsoNormal' dir='RTL' style='text-align:justify;text-justify:kashida; text-kashida:0%;line-height:150%'><span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'> اين نكتة بسيار مهمي است كه با وجود ويژگيهاي مختلف در سرعت و مقدار <span dir='LTR' style='font-size:16.0pt;line-height: 150%;mso-bidi-font-family:Lotus'>ROM به كار رفته در انواع <span dir='LTR' style='font-size:16.0pt;line-height:150%; mso-bidi-font-family:Lotus'>8051<span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'>، سازگاري كامل با 8051<span style='font-size:16.0pt;line-height:150%; font-family:Lotus' lang='AR-SA'> اصلي و دستورالعملهاي مربوطه هنوز هم وجود دارد. يعني اگر برنامه اي براي يكي از <span dir='LTR' style='font-size:16.0pt; line-height:150%;mso-bidi-font-family:Lotus'>8051<span style='font-size:16.0pt;line-height: 150%;font-family:Lotus' lang='AR-SA'>ها نوشته شود مي توان آن را بر روي <span dir='LTR' style='font-size:16.0pt;line-height:150%; mso-bidi-font-family:Lotus'>8051هاي ديگر اجرا كرد. صرفنظر از سازندة ميكروكنترلر <span dir='LTR' style='font-size:16.0pt;line-height:150%; mso-bidi-font-family:Lotus'>8051<span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'>. <p class='MsoNormal' dir='RTL' style='text-align:justify;text-justify:kashida; text-kashida:0%;line-height:150%'><span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'> <p class='MsoNormal' dir='RTL' style='text-align:justify;text-justify:kashida; text-kashida:0%;line-height:150%'><span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'> <p class='MsoNormal' dir='RTL' style='text-align:justify;text-justify:kashida; text-kashida:0%;line-height:150%'><span style='font-size:16.0pt; line-height:150%;font-family:"B Yagut"' lang='AR-SA'> <span style='font-size:16.0pt;mso-ansi-font-size:18.0pt;line-height:150%; font-family:"B Yagut"' lang='AR-SA'>ويژگيهاي <span dir='LTR' style='font-size:18.0pt;mso-bidi-font-size:16.0pt;line-height:150%; mso-bidi-font-family:"B Yagut"'>8051<span style='font-size:16.0pt;mso-ansi-font-size: 18.0pt;line-height:150%;font-family:"B Yagut"'> <span dir='LTR' style='font-size:18.0pt;mso-bidi-font-size:16.0pt;line-height:150%;mso-bidi-font-family: "B Yagut"'> <span style='font-size:16.0pt;mso-ansi-font-size:18.0pt;line-height:150%; font-family:"B Yagut"' lang='AR-SA'> <span dir='LTR' style='font-size:18.0pt; mso-bidi-font-size:16.0pt;line-height:150%;mso-bidi-font-family:"B Yagut"'> <p class='MsoNormal' dir='RTL' style='margin-right:36.0pt;text-align:justify; text-justify:kashida;text-kashida:0%;line-height:150%'><span style='mso-ignore:vglayout;position: absolute;z-index:251657216;left:0px;margin-left:256px;margin-top:5px; width:39px;height:12px'><span style='mso-ignore:vglayout;position: absolute;z-index:251653120;left:0px;margin-left:538px;margin-top:5px; width:39px;height:12px'><span dir='LTR' style='font-size:16.0pt; line-height:150%;mso-bidi-font-family:Lotus'> ROM<span style='font-size:16.0pt;line-height:150%; font-family:Lotus' lang='AR-SA'> <span dir='LTR' style='font-size:16.0pt; line-height:150%;mso-bidi-font-family:Lotus'> 1 Serial Port 4kbytes <p class='MsoNormal' dir='RTL' style='margin-right:36.0pt;text-align:justify; text-justify:kashida;text-kashida:0%;line-height:150%'><span style='mso-ignore:vglayout;position: absolute;z-index:251658240;left:0px;margin-left:256px;margin-top:5px; width:39px;height:12px'><span style='mso-ignore:vglayout;position: absolute;z-index:251654144;left:0px;margin-left:538px;margin-top:5px; width:39px;height:12px'><span dir='LTR' style='font-size:16.0pt; line-height:150%;mso-bidi-font-family:Lotus'>RAM<span style='font-size:16.0pt;line-height:150%; font-family:Lotus' lang='AR-SA'> <span dir='LTR' style='font-size:16.0pt;line-height:150%; mso-bidi-font-family:Lotus'> 6 Interrupt Sources 28bytes <p class='MsoNormal' dir='RTL' style='text-align:justify;text-justify:kashida; text-kashida:0%;text-indent:36.0pt;line-height:150%'><span style='mso-ignore:vglayout;position: absolute;z-index:251655168;left:0px;margin-left:538px;margin-top:4px; width:39px;height:12px'><span dir='LTR' style='font-size:16.0pt; line-height:150%;mso-bidi-font-family:Lotus'>Timer<span style='font-size:16.0pt;line-height:150%; font-family:Lotus' lang='AR-SA'> 2 <p class='MsoNormal' dir='RTL' style='text-align:justify;text-justify:kashida; text-kashida:0%;text-indent:36.0pt;line-height:150%'><span style='mso-ignore:vglayout;position: absolute;z-index:251656192;left:0px;margin-left:538px;margin-top:4px; width:39px;height:12px'><span dir='LTR' style='font-size:16.0pt; line-height:150%;mso-bidi-font-family:Lotus'>I/O Pins<span style='font-size:16.0pt;line-height:150%; font-family:Lotus' lang='AR-SA'> <span dir='LTR' style='font-size:16.0pt;line-height:150%; mso-bidi-font-family:Lotus'>32 <p class='MsoNormal' dir='RTL' style='text-align:justify;text-justify:kashida; text-kashida:0%;line-height:150%'><span dir='LTR' style='font-size:16.0pt; line-height:150%;mso-bidi-font-family:Lotus'> <p class='MsoNormal' dir='RTL' style='text-align:justify;text-justify:kashida; text-kashida:0%;line-height:150%'> ميكرو كنترلر8051<span dir='LTR' style='font-size:16.0pt;line-height:150%;mso-bidi-font-family: Lotus' lang='AR-SA'> <span style='font-size:16.0pt;line-height:150%; font-family:Lotus' lang='AR-SA'> عضو اصلي خانوادة <span dir='LTR' style='font-size:16.0pt;line-height:150%; mso-bidi-font-family:Lotus'>8051 <span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'> است كه شركت ايتل از آن به عنوان MCS-51 ياد مي كند. <p class='MsoNormal' dir='RTL' style='text-align:justify;text-justify:kashida; text-kashida:0%;line-height:150%'><span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'> اعضاي ديگر خانوادة 8051<span style='font-size:16.0pt;line-height:150%; font-family:Lotus' lang='AR-SA'>، 8052، <span dir='LTR' style='font-size:16.0pt; line-height:150%;mso-bidi-font-family:Lotus'>8031، <span dir='LTR' style='font-size:16.0pt;line-height:150%; mso-bidi-font-family:Lotus'>8751<span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'> و... مي باشد. <p class='MsoNormal' dir='RTL' style='text-align:justify;text-justify:kashida; text-kashida:0%;line-height:150%'><span dir='LTR' style='font-size:18.0pt;mso-bidi-font-size:16.0pt;line-height:150%; mso-bidi-font-family:Lotus'>8051 <span style='font-size:16.0pt; mso-ansi-font-size:18.0pt;line-height:150%;font-family:Lotus' lang='AR-SA'> <p class='MsoNormal' dir='RTL' style='text-align:justify;text-justify:kashida; text-kashida:0%;line-height:150%'><span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'> درون 8051 <p class='MsoNormal' dir='RTL' style='text-align:justify;text-justify:kashida; text-kashida:0%;line-height:150%'><span dir='LTR' style='font-size:16.0pt; line-height:150%;mso-bidi-font-family:Lotus;mso-bidi-language:FA'> <p class='MsoNormal' dir='RTL' style='text-align:justify;text-justify:kashida; text-kashida:0%;line-height:150%'><span dir='LTR' style='font-size:16.0pt; line-height:150%;mso-bidi-font-family:Lotus'> <span style='font-size:16.0pt;line-height:150%; font-family:Lotus' lang='AR-SA'>در يك<span dir='LTR' style='font-size:16.0pt; line-height:150%;mso-bidi-font-family:Lotus'>CPU <span style='font-size:16.0pt;line-height:150%; font-family:Lotus' lang='AR-SA'> از ثباتها ، Register<span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'> به عنوان مكاني براي ذخيره سازي موقت اطلاعات مورد استفاده قرار مي گيرد. اكثر ثباتهاي 8051<span style='font-size:16.0pt;line-height:150%; font-family:Lotus' lang='AR-SA'> ، <span dir='LTR' style='font-size:16.0pt; line-height:150%;mso-bidi-font-family:Lotus'>8 بيتي هستند. <p class='MsoNormal' dir='RTL' style='text-align:justify;text-justify:kashida; text-kashida:0%;line-height:150%'><span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'> در ثباتهاي 8051<span style='font-size:16.0pt;line-height:150%; font-family:Lotus' lang='AR-SA'> فقط داده <span dir='LTR' style='font-size:16.0pt; line-height:150%;mso-bidi-font-family:Lotus'>8 بيتي مي تواند قرار داد. در دياگرام زير يك ثبات با 8 بيت خود به ترتيب از با ارزشترين D7<span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'> تا كم ارزشترين <span dir='LTR' style='font-size:16.0pt;line-height:150%; mso-bidi-font-family:Lotus'>D0 نشان داده شده است. <p class='MsoNormal' dir='RTL' style='text-align:justify;text-justify:kashida; text-kashida:0%;line-height:150%'><span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'> <table class='MsoNormalTable' style='border-collapse:collapse;mso-table-layout-alt:fixed;border:none; mso-border-alt:solid windowtext .5pt;mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-border-insideh:.5pt solid windowtext;mso-border-insidev:.5pt solid windowtext' border='1' cellpadding='0' cellspacing='0'> <tr style='mso-yfti-irow:0;mso-yfti-firstrow:yes;mso-yfti-lastrow:yes; height:17.4pt'> <td style='width:58.2pt;border:solid windowtext 1.0pt; mso-border-alt:solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt;height:17.4pt' valign='top' width='78'> <p class='MsoNormal' dir='RTL' style='text-align:center;line-height: 150%' align='center'><span dir='LTR' style='font-size:16.0pt;line-height:150%;mso-bidi-font-family: Lotus'>D7 <td style='width:63.25pt;border:solid windowtext 1.0pt; border-left:none;mso-border-left-alt:solid windowtext .5pt;mso-border-alt: solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt;height:17.4pt' valign='top' width='84'> <span dir='LTR' style='mso-bidi-font-size:16.0pt;line-height:150%;mso-bidi-font-family: Lotus'>D6 <td style='width:63.25pt;border:solid windowtext 1.0pt; border-left:none;mso-border-left-alt:solid windowtext .5pt;mso-border-alt: solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt;height:17.4pt' valign='top' width='84'> <span dir='LTR' style='mso-bidi-font-size:16.0pt;line-height:150%;mso-bidi-font-family: Lotus'>D5 <td style='width:63.25pt;border:solid windowtext 1.0pt; border-left:none;mso-border-left-alt:solid windowtext .5pt;mso-border-alt: solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt;height:17.4pt' valign='top' width='84'> <span dir='LTR' style='mso-bidi-font-size:16.0pt;line-height:150%;mso-bidi-font-family: Lotus'>D4 <td style='width:63.25pt;border:solid windowtext 1.0pt; border-left:none;mso-border-left-alt:solid windowtext .5pt;mso-border-alt: solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt;height:17.4pt' valign='top' width='84'> <span dir='LTR' style='mso-bidi-font-size:16.0pt;line-height:150%;mso-bidi-font-family: Lotus'>D3 <td style='width:63.25pt;border:solid windowtext 1.0pt; border-left:none;mso-border-left-alt:solid windowtext .5pt;mso-border-alt: solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt;height:17.4pt' valign='top' width='84'> <span dir='LTR' style='mso-bidi-font-size:16.0pt;line-height:150%;mso-bidi-font-family: Lotus'>D2 <td style='width:63.25pt;border:solid windowtext 1.0pt; border-left:none;mso-border-left-alt:solid windowtext .5pt;mso-border-alt: solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt;height:17.4pt' valign='top' width='84'> <span dir='LTR' style='mso-bidi-font-size:16.0pt;line-height:150%;mso-bidi-font-family: Lotus'>D1 <td style='width:63.25pt;border:solid windowtext 1.0pt; border-left:none;mso-border-left-alt:solid windowtext .5pt;mso-border-alt: solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt;height:17.4pt' valign='top' width='84'> <span dir='LTR' style='mso-bidi-font-size:16.0pt;line-height:150%;mso-bidi-font-family: Lotus'>D0 <p class='MsoNormal' dir='RTL' style='text-align:justify;text-justify:kashida; text-kashida:0%;line-height:150%'><span dir='LTR' style='font-size:16.0pt; line-height:150%;mso-bidi-font-family:Lotus'> <p class='MsoNormal' dir='RTL' style='text-align:justify;text-justify:kashida; text-kashida:0%;line-height:150%'><span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'>تعدادي از ثباتها كه بيشترين كاربرد را دارند عبارتند از: <p class='MsoNormal' dir='RTL' style='text-align:justify;text-justify:kashida; text-kashida:0%;line-height:150%'><span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'> A<span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'> (انباشتگر) <span dir='LTR' style='font-size:16.0pt;line-height:150%; mso-bidi-font-family:Lotus'>B ، <span dir='LTR' style='font-size: 16.0pt;line-height:150%;mso-bidi-font-family:Lotus'>R0<span style='font-size:16.0pt;line-height:150%; font-family:Lotus' lang='AR-SA'>، R1<span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'>، <span dir='LTR' style='font-size:16.0pt;line-height:150%;mso-bidi-font-family: Lotus'>R2، <span dir='LTR' style='font-size:16.0pt;line-height:150%; mso-bidi-font-family:Lotus'>R3، <span dir='LTR' style='font-size: 16.0pt;line-height:150%;mso-bidi-font-family:Lotus'>R4<span style='font-size:16.0pt;line-height:150%; font-family:Lotus' lang='AR-SA'>، R5<span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'>، <span dir='LTR' style='font-size:16.0pt;line-height:150%;mso-bidi-font-family: Lotus'>R6، <span dir='LTR' style='font-size:16.0pt;line-height:150%; mso-bidi-font-family:Lotus'>R7، <span dir='LTR' style='font-size: 16.0pt;line-height:150%;mso-bidi-font-family:Lotus'>DPTR<span style='font-size:16.0pt;line-height:150%; font-family:Lotus' lang='AR-SA'> (شانگر داده) و PC<span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'> (<span dir='LTR' style='font-size: 16.0pt;line-height:150%;mso-bidi-font-family:Lotus'>Program counter<span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'> شمارندة برنامه) كه همگي 8 بيتي اند به جزء DPTR<span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'> و <span dir='LTR' style='font-size:16.0pt;line-height:150%;mso-bidi-font-family: Lotus'>PC . <p class='MsoNormal' dir='RTL' style='text-align:justify;text-justify:kashida; text-kashida:0%;line-height:150%'><span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'> ثبات <span dir='LTR' style='font-size:16.0pt;line-height:150%; mso-bidi-font-family:Lotus'>PC يا شمارندة برنامه به آدرس دستورالعمل بعدي كه اجرا خواهد شد اشاره مي كند. زماني كه <span dir='LTR' style='font-size:16.0pt;line-height:150%; mso-bidi-font-family:Lotus'>CPU كه عملي را از برنامة موجود در ROM<span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'> واكشي مي كند شمارندة برنامه افزايش يافته و به دستورالعمل بعدي اشاره مي كند. اين ثبات 16<span style='font-size:16.0pt;line-height:150%; font-family:Lotus' lang='AR-SA'> بيتي است. <p class='MsoNormal' dir='RTL' style='text-align:justify;text-justify:kashida; text-kashida:0%;line-height:150%'><span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'> به هنگام روشن شدن ميكروكنترلر 8051<span style='font-size:16.0pt;line-height:150%; font-family:Lotus' lang='AR-SA'> همگي از آدرس0000<span dir='LTR' style='font-size: 16.0pt;line-height:150%;mso-bidi-font-family:Lotus' lang='AR-SA'> شروع به كار مي كنند. به عبارت ديگر هنگام روشن شدن PC<span style='font-size:16.0pt; line-height:150%;font-family:Lotus' lang='AR-SA'> مقدار 0000<span style='font-size:16.0pt;line-height:150%; font-family:Lotus' lang='AR-SA'> را در خود خواهد داشت.