单片机硬件系统设计原则_zkheartboy.mht

一个单片机应用系统的硬件电路设计包含两部分内容：一是系统扩展

#tab A.on:link {
	MARGIN-TOP: 3px; FONT-SIZE: 14px; COLOR: #ffffff; LINE-HEIGHT: 19px; =
BACKGROUND-COLOR: #a1b6ce
}
#tab A.on:visited {
	MARGIN-TOP: 3px; FONT-SIZE: 14px; COLOR: #ffffff; LINE-HEIGHT: 19px; =
BACKGROUND-COLOR: #a1b6ce
}
#tab SPAN {
	FONT-SIZE: 14px; COLOR: #ffffff
}
#tab A:link {
	FONT-SIZE: 14px; COLOR: #ffffff; TEXT-DECORATION: none
}
#tab A:visited {
	FONT-SIZE: 14px; COLOR: #ffffff; TEXT-DECORATION: none
}
#tab2 {
	BACKGROUND: #dae9f5
}
#tab2 SPAN {
	FONT-WEIGHT: bold; FONT-SIZE: 12px; COLOR: #000000
}
#tab2 A {
	FONT-SIZE: 12px
}
#tab2 A:link {
	COLOR: #0000cc
}
#tab2 A:visited {
	COLOR: #0000cc
}
.stage {
=09
}
#comm_info {
	FONT-FAMILY: Arial; TEXT-ALIGN: left; ccolor: #000000
}
#comm_info DIV.line {
	BORDER-TOP: #bdd5ef 1px solid; MARGIN-TOP: 5px; LINE-HEIGHT: 8px
}
#comm_info A {
	COLOR: #196cca
}
#page {
	FONT-SIZE: 14px; FONT-FAMILY: Arial; HEIGHT: 30px; TEXT-ALIGN: center
}
#page SPAN {
	PADDING-RIGHT: 3px; PADDING-LEFT: 3px; FONT-WEIGHT: bold; FONT-SIZE: =
14px; PADDING-BOTTOM: 3px; COLOR: #000000; PADDING-TOP: 3px
}
#page A.pc {
	FONT-WEIGHT: bold; FONT-SIZE: 14px; COLOR: #196cca
}
#page A.pc:visited {
	COLOR: #196cca
}
#page A.pi {
	PADDING-RIGHT: 3px; PADDING-LEFT: 3px; FONT-SIZE: 14px; PADDING-BOTTOM: =
3px; COLOR: #196cca; PADDING-TOP: 3px
}
#page A.pi:visited {
	COLOR: #196cca
}
.mod {
	MARGIN-BOTTOM: 10px
}
.modhandle {
	CURSOR: move
}
.modth {
	HEIGHT: 24px
}
.modhead {
	PADDING-RIGHT: 4px; PADDING-LEFT: 4px; PADDING-BOTTOM: 0px; =
PADDING-TOP: 4px
}
.modopt {
	PADDING-RIGHT: 4px; PADDING-LEFT: 0px; PADDING-BOTTOM: 0px; =
PADDING-TOP: 4px
}
.modtit {
	FONT-WEIGHT: bold; FONT-SIZE: 12px; COLOR: #000000
}
A.modtit {
	COLOR: #000000
}
A.modtit:visited {
	COLOR: #000000
}
.modtitlink {
	FONT-WEIGHT: bold; FONT-SIZE: 12px; COLOR: #ffffff
}
A.modtitlink {
	COLOR: #ffffff; TEXT-DECORATION: none
}
A.modtitlink:visited {
	COLOR: #ffffff; TEXT-DECORATION: none
}
A.modtitlink:hover {
	COLOR: #ffffff; TEXT-DECORATION: underline
}
.modact {
	FONT-SIZE: 12px; COLOR: #000000
}
A.modact:link {
	COLOR: #000000
}
A.modact:visited {
	COLOR: #000000
}
.modbox {
	BORDER-RIGHT: #a6bcd3 1px solid; PADDING-RIGHT: 10px; PADDING-LEFT: =
10px; BACKGROUND: #ebf2f9; PADDING-BOTTOM: 0px; BORDER-LEFT: #a6bcd3 1px =
solid; PADDING-TOP: 10px
}
.modtl {
	BACKGROUND: url(http://img.baidu.com/hi/temp16/ptitl.gif) no-repeat =
left top; LINE-HEIGHT: 1px
}
.modtc {
	BACKGROUND: url(http://img.baidu.com/hi/temp16/ptitc.gif) repeat-x
}
.modtr {
	BACKGROUND: url(http://img.baidu.com/hi/temp16/ptitr.gif) no-repeat =
right top; LINE-HEIGHT: 1px
}
.modbl {
	BORDER-LEFT: #a6bcd3 1px solid; LINE-HEIGHT: 1px; BORDER-BOTTOM: =
#a6bcd3 1px solid; BACKGROUND-COLOR: #ebf2f9
}
.modbc {
	LINE-HEIGHT: 1px; BORDER-BOTTOM: #a6bcd3 1px solid; BACKGROUND-COLOR: =
#ebf2f9
}
.modbr {
	BORDER-RIGHT: #a6bcd3 1px solid; LINE-HEIGHT: 1px; BORDER-BOTTOM: =
#a6bcd3 1px solid; BACKGROUND-COLOR: #ebf2f9
}
.modbox {
	FILTER: alpha(opacity=3D80); WIDTH: 100%; moz-opacity: 0.8
}
.modbl {
	FILTER: alpha(opacity=3D80); WIDTH: 100%; moz-opacity: 0.8
}
.modbc {
	FILTER: alpha(opacity=3D80); WIDTH: 100%; moz-opacity: 0.8
}
.modbr {
	FILTER: alpha(opacity=3D80); WIDTH: 100%; moz-opacity: 0.8
}
#m_blog DIV.tit {
	FONT-WEIGHT: bold; FONT-SIZE: 14px
}
#m_blog DIV.tit A {
	FONT-WEIGHT: bold; FONT-SIZE: 14px; COLOR: #000000
}
#m_blog DIV.tit A:visited {
	COLOR: #000000
}
#m_blog DIV.date {
	MARGIN: 5px 0px 8px; COLOR: #666666
}
#m_blog DIV.cnt {
	FONT-SIZE: 14px; COLOR: #000000; LINE-HEIGHT: 20px
}
#m_blog DIV.more {
	MARGIN: 14px 0px 16px
}
#m_blog DIV.more A {
	FONT-SIZE: 14px; COLOR: #196cca
}
#m_blog DIV.more A:visited {
	COLOR: #196cca
}
#m_blog DIV.opt {
	FONT-SIZE: 12px; COLOR: #666666
}
#m_blog DIV.opt A {
	FONT-SIZE: 12px; COLOR: #196cca
}
#m_blog DIV.opt A:visited {
	COLOR: #196cca
}
#m_blog DIV.line {
	BORDER-TOP: #bdd5ef 1px solid; MARGIN-TOP: 17px; LINE-HEIGHT: 17px
}
#m_blog DIV.none {
	PADDING-RIGHT: 0px; PADDING-LEFT: 0px; FONT-SIZE: 14px; PADDING-BOTTOM: =
100px; COLOR: #000000; PADDING-TOP: 100px
}
#m_pro A {
	COLOR: #196cca
}
#m_pro A:visited {
	COLOR: #196cca
}
#m_pro DIV.image {
	TEXT-ALIGN: center
}
#m_pro DIV.act {
	MARGIN-TOP: 10px
}
#m_pro DIV.user {
	MARGIN-TOP: 10px; FONT-WEIGHT: bold; FONT-SIZE: 12px; COLOR: #000000
}
#m_pro DIV.desc {
	FONT-SIZE: 12px; COLOR: #000000
}
#m_pro DIV.line {
	BORDER-TOP: #bdd5ef 1px solid; MARGIN-TOP: 17px; LINE-HEIGHT: 17px
}
#m_pro TD {
	FONT-SIZE: 14px; COLOR: #000000; LINE-HEIGHT: 24px
}
#m_album DIV.image {
	TEXT-ALIGN: center
}
#m_album DIV.page {
	FONT-SIZE: 12px; COLOR: #666666; TEXT-ALIGN: center
}
#m_album DIV.page A {
	FONT-SIZE: 12px; COLOR: #0000cc
}
#m_album DIV.page A:visited {
	COLOR: #0000cc
}
#m_links DIV.item {
	FONT-SIZE: 12px; COLOR: #000000
}
#m_links DIV.item A {
	FONT-SIZE: 12px; COLOR: #196cca; TEXT-DECORATION: none
}
#m_links DIV.item A:visited {
	COLOR: #196cca
}
#m_links DIV.line {
	BORDER-TOP: #bdd5ef 1px solid; MARGIN-TOP: 5px; LINE-HEIGHT: 8px
}
#m_artclg DIV.item {
	FONT-SIZE: 12px; COLOR: #666666
}
#m_artclg DIV.item A {