📄 数码管显示驱动和键盘扫描控制器ch451及其应用.htm
字号:
9.0pt;font-family:"\000B "'>15<o:p></o:p></span></p>
</td>
<td width="14%" style='width:14.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
lang=EN-US style='font-size:9.0pt;font-family:"\000B "'>1</span><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'>、</span><span lang=EN-US style='font-size:
9.0pt;font-family:"\000B "'>24</span><span style='font-size:9.0pt;font-family:
宋体;mso-ascii-font-family:"\000B ";mso-hansi-font-family:"\000B "'>～</span><span
lang=EN-US style='font-size:9.0pt;font-family:"\000B "'>18<o:p></o:p></span></p>
</td>
<td width="15%" style='width:15.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
lang=EN-US style='font-size:9.0pt;font-family:"\000B "'>DIG7</span><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'>～</span><span lang=EN-US style='font-size:
9.0pt;font-family:"\000B "'>SEG0<o:p></o:p></span></p>
</td>
<td width="19%" style='width:19.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'>三态输出及输入</span><span lang=EN-US
style='font-size:9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
</td>
<td width="39%" style='width:39.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'>数码管的段驱动，高电平有效，键盘扫描输入，高电平有效，带下拉</span><span
lang=EN-US style='font-size:9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
</td>
</tr>
<tr>
<td width="13%" style='width:13.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
lang=EN-US style='font-size:9.0pt;font-family:"\000B "'>1</span><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'>～</span><span lang=EN-US style='font-size:
9.0pt;font-family:"\000B "'>8<o:p></o:p></span></p>
</td>
<td width="14%" style='width:14.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
lang=EN-US style='font-size:9.0pt;font-family:"\000B "'>7</span><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'>～</span><span lang=EN-US style='font-size:
9.0pt;font-family:"\000B "'>14<o:p></o:p></span></p>
</td>
<td width="15%" style='width:15.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
lang=EN-US style='font-size:9.0pt;font-family:"\000B "'>DIG7</span><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'>～</span><span lang=EN-US style='font-size:
9.0pt;font-family:"\000B "'>DIG0<o:p></o:p></span></p>
</td>
<td width="19%" style='width:19.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'>输出</span><span lang=EN-US style='font-size:
9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
</td>
<td width="39%" style='width:39.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'>数码管的字驱动，低电平有效，键盘扫描输入，高电平有效，带下拉</span><span
lang=EN-US style='font-size:9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
</td>
</tr>
<tr>
<td width="13%" style='width:13.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
lang=EN-US style='font-size:9.0pt;font-family:"\000B "'>12<o:p></o:p></span></p>
</td>
<td width="14%" style='width:14.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'>不支持</span><span lang=EN-US style='font-size:
9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
</td>
<td width="15%" style='width:15.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
lang=EN-US style='font-size:9.0pt;font-family:"\000B "'>RST<o:p></o:p></span></p>
</td>
<td width="19%" style='width:19.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'>输出</span><span lang=EN-US style='font-size:
9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
</td>
<td width="39%" style='width:39.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'>上电复位和看门狗复位，高电平有效</span><span lang=EN-US
style='font-size:9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
</td>
</tr>
<tr>
<td width="13%" style='width:13.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
lang=EN-US style='font-size:9.0pt;font-family:"\000B "'>13<o:p></o:p></span></p>
</td>
<td width="14%" style='width:14.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'>不支持</span><span lang=EN-US style='font-size:
9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
</td>
<td width="15%" style='width:15.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
lang=EN-US style='font-size:9.0pt;font-family:"\000B "'>RST<o:p></o:p></span></p>
</td>
<td width="19%" style='width:19.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'>输出</span><span lang=EN-US style='font-size:
9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
</td>
<td width="39%" style='width:39.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'>上电复位和看门狗复位，低电平有效</span><span lang=EN-US
style='font-size:9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
</td>
</tr>
<tr>
<td width="13%" style='width:13.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
lang=EN-US style='font-size:9.0pt;font-family:"\000B "'>28<o:p></o:p></span></p>
</td>
<td width="14%" style='width:14.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'>不支持</span><span lang=EN-US style='font-size:
9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
</td>
<td width="15%" style='width:15.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
lang=EN-US style='font-size:9.0pt;font-family:"\000B "'>RSTI<o:p></o:p></span></p>
</td>
<td width="19%" style='width:19.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'>输入</span><span lang=EN-US style='font-size:
9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
</td>
<td width="39%" style='width:39.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'>上电复位门限调整或手工复位输入</span><span lang=EN-US
style='font-size:9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
</td>
</tr>
<tr>
<td width="13%" style='width:13.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
lang=EN-US style='font-size:9.0pt;font-family:"\000B "'>14<o:p></o:p></span></p>
</td>
<td width="14%" style='width:14.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'>不支持</span><span lang=EN-US style='font-size:
9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
</td>
<td width="15%" style='width:15.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
lang=EN-US style='font-size:9.0pt;font-family:"\000B "'>ADJ<o:p></o:p></span></p>
</td>
<td width="19%" style='width:19.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'>输入</span><span lang=EN-US style='font-size:
9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
</td>
<td width="39%" style='width:39.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'>段电流上限调整，带强下拉</span><span lang=EN-US
style='font-size:9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
</td>
</tr>
<tr>
<td width="13%" style='width:13.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
lang=EN-US style='font-size:9.0pt;font-family:"\000B "'>10<o:p></o:p></span></p>
</td>
<td width="14%" style='width:14.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'>不支持</span><span lang=EN-US style='font-size:
9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
</td>
<td width="15%" style='width:15.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
lang=EN-US style='font-size:9.0pt;font-family:"\000B "'>CLK<o:p></o:p></span></p>
</td>
<td width="19%" style='width:19.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'>输入</span><span lang=EN-US style='font-size:
9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
</td>
<td width="39%" style='width:39.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'>外接阻容振荡</span><span lang=EN-US
style='font-size:9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
</td>
</tr>
<tr>
<td width="13%" style='width:13.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
lang=EN-US style='font-size:9.0pt;font-family:"\000B "'>11<o:p></o:p></span></p>
</td>
<td width="14%" style='width:14.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'>不支持</span><span lang=EN-US style='font-size:
9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
</td>
<td width="15%" style='width:15.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
lang=EN-US style='font-size:9.0pt;font-family:"\000B "'>CLKO<o:p></o:p></span></p>
</td>
<td width="19%" style='width:19.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'>输出</span><span lang=EN-US style='font-size:
9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
</td>
<td width="39%" style='width:39.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
lang=EN-US style='font-size:9.0pt;font-family:"\000B "'>CLK</span><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'>引脚时钟信号的二分频输出</span><span lang=EN-US
style='font-size:9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
</td>
</tr>
<tr>
<td width="13%" style='width:13.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'> </span><span lang=EN-US style='font-size:
9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
</td>
<td width="14%" style='width:14.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
lang=EN-US style='font-size:9.0pt;font-family:"\000B "'>17<o:p></o:p></span></p>
</td>
<td width="15%" style='width:15.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
lang=EN-US style='font-size:9.0pt;font-family:"\000B "'>NC<o:p></o:p></span></p>
</td>
<td width="19%" style='width:19.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";
mso-hansi-font-family:"\000B "'> </span><span lang=EN-US style='font-size:
9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
</td>
<td width="39%" style='width:39.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=left style='text-align:left'><span style='font-size:
9.0pt;font-family:宋体;mso-ascii-font-family:"\000B ";mso-hansi-font-family:
"\000B "'>不连接，禁止使用</span><span lang=EN-US style='font-size:9.0pt;font-family:
宋体'><o:p></o:p></span></p>
</td>
</tr>
</table>
<p style='text-indent:22.5pt;line-height:150%;word-break:break-all'><b><span
style='font-size:9.0pt;mso-ascii-font-family:"\000B ";mso-hansi-font-family:
"\000B "'>２ ＣＨ４５１的操作命令</span></b><b><span style='font-size:9.0pt;font-family:
"\000B "'> </span></b><span lang=EN-US style='font-size:9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
<p style='text-indent:22.5pt;line-height:150%;word-break:break-all'><span
style='font-size:9.0pt;mso-ascii-font-family:"\000B ";mso-hansi-font-family:
"\000B "'>ＣＨ４５１的操作命令均为１２位，其中高４位为标识码，低８位为参数，各操作命令如下：</span><span lang=EN-US
style='font-size:9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
<p style='text-indent:22.5pt;line-height:150%;word-break:break-all'><span
style='font-size:9.0pt;mso-ascii-font-family:"\000B ";mso-hansi-font-family:
"\000B "'>●空操作：００００ｘｘｘｘｘｘｘｘＢ（ｘ可为任意值，下同）</span><span lang=EN-US
style='font-size:9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
<p style='text-indent:22.5pt;line-height:150%;word-break:break-all'><span
style='font-size:9.0pt;mso-ascii-font-family:"\000B ";mso-hansi-font-family:
"\000B "'>空操作命令对ＣＨ４５１不产生任何影响。该命令可以在多个ＣＨ４５１级联的应用中透过前级ＣＨ４５１向后级ＣＨ４５１发送操作命令而不影响前级ＣＨ４５１的状态。例如，要将操作命令００１００００００００１Ｂ发送给两级级联电路中的后级ＣＨ４５１（后级ＣＨ４５１的ＤＩＮ引脚连接到前级ＣＨ４５１的ＤＯＵＴ引脚），只要在该操作命令后添加空操作命令００００００００００００Ｂ再发送，那么，该操作命令将经过前级ＣＨ４５１到达后级ＣＨ４５１，而空操作命令留给了前级ＣＨ４５１。另外，为了在不影响ＣＨ４５１的前提下变化ＤＣＬＫ以清除看门狗计时器，也可以发送空操作命令。在非级联的应用中，空操作命令可只发送高４位。</span><span
lang=EN-US style='font-size:9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
<p style='text-indent:22.5pt;line-height:150%;word-break:break-all'><span
style='font-size:9.0pt;mso-ascii-font-family:"\000B ";mso-hansi-font-family:
"\000B "'>●</span><span style='font-size:9.0pt;font-family:"\000B "'> </span><span
style='font-size:9.0pt;mso-ascii-font-family:"\000B ";mso-hansi-font-family:
"\000B "'>芯片内部复位：００１００００００００１Ｂ</span><span lang=EN-US style='font-size:9.0pt;
font-family:"\000B "'><o:p></o:p></span></p>
<p style='text-indent:22.5pt;line-height:150%;word-break:break-all'><span
style='font-size:9.0pt;mso-ascii-font-family:"\000B ";mso-hansi-font-family:
"\000B "'>内部复位命令可将ＣＨ４５１的各个寄存器和各种参数复位到默认的状态。芯片上电时，ＣＨ４５１均被复位，此时各个寄存器均复位为０，各种参数均恢复为默认值。</span><span
lang=EN-US style='font-size:9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
<p style='text-indent:22.5pt;line-height:150%;word-break:break-all'><span
style='font-size:9.0pt;mso-ascii-font-family:"\000B ";mso-hansi-font-family:
"\000B "'>●</span><span style='font-size:9.0pt;font-family:"\000B "'> </span><span
style='font-size:9.0pt;mso-ascii-font-family:"\000B ";mso-hansi-font-family:
"\000B "'>字数据移位：００１１００００００</span><span lang=EN-US style='font-size:9.0pt;
font-family:"\000B "'>[</span><span style='font-size:9.0pt;mso-ascii-font-family:
"\000B ";mso-hansi-font-family:"\000B "'>Ｄ１</span><span lang=EN-US
style='font-size:9.0pt;font-family:"\000B "'>][</span><span style='font-size:
9.0pt;mso-ascii-font-family:"\000B ";mso-hansi-font-family:"\000B "'>Ｄ０</span><span
lang=EN-US style='font-size:9.0pt;font-family:"\000B "'>]</span><span
style='font-size:9.0pt;mso-ascii-font-family:"\000B ";mso-hansi-font-family:
"\000B "'>Ｂ</span><span lang=EN-US style='font-size:9.0pt;font-family:"\000B "'><o:p></o:p></span></p>
<p style='text-indent:22.5pt;line-height:150%;word-break:break-all'><span
style='font-size:9.0pt;mso-ascii-font-family:"\000B ";mso-hansi-font-family:
"\000B "'>字数据移位命令共有４个：开环左移、右移，闭环左移、右移。Ｄ０为０时为开环，为１时为闭环，Ｄ１为０时左移，为１时为右移。开环左移时⌨️ 快捷键说明
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