提交 c4a3fef6 创建 作者: 李川's avatar 李川 提交者: 宋海霞

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<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="90" font-weight="700" text-anchor="start" x="1919" y="1360">计数器0</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="90" font-weight="700" text-anchor="start" x="1921" y="1313">计数器0</text>
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<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="90" font-weight="700" text-anchor="start" x="1941" y="2413">计数器1</text>
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<text alignment-baseline="after-edge" fill="#000000" font-family="微软雅黑" font-size="65" font-weight="400" text-anchor="start" x="121" y="413">[C]北京英真时代科技有限公司保留所有权利。</text>
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没有这种文件类型的预览
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<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="2244" y="791">计数使能,低电平有效</text>
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<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="354" y="2291">①写方式控制字后输出低电平</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="163" y="2386">①写方式控制字后输出低电平</text>
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<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="2254" y="1111">计数器异步置数信号,低电平有效</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1051" y="2256">CLK</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1172" y="2159">2</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="981" y="2254">2</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1284" y="2034">PR</text>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1093" y="2129">PR</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1262" y="1999">6</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1071" y="2094">6</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1285" y="2194">CLR</text>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1094" y="2289">CLR</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1261" y="2254">3</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1070" y="2349">3</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1328" y="2058">Q</text>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1137" y="2153">Q</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1372" y="2061">5</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1181" y="2156">5</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1312" y="2160">^Q</text>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1121" y="2255">^Q</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1363" y="2161">4</text>
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<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="1359" y="2003">U2</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="1168" y="2098">U2</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="1321" y="2266">D_FLOP</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="1130" y="2361">D_FLOP</text>
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<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="254" y="1611">④写入计数初值后下个上升沿加载16位计数初值</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="63" y="1706">④写入计数初值后下个上升沿加载16位计数初值</text>
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<text alignment-baseline="central" fill="#800000" font-family="Times New Roman" font-size="25" font-weight="400" text-anchor="start" x="354" y="1691">CLK</text>
<text alignment-baseline="central" fill="#800000" font-family="Times New Roman" font-size="25" font-weight="400" text-anchor="start" x="163" y="1786">CLK</text>
<text alignment-baseline="after-edge" fill="#ff0000" font-family="宋体" font-size="37" font-weight="400" text-anchor="start" x="3654" y="761">(1):软件启动,不能自动重复</text>
<text alignment-baseline="after-edge" fill="#ff0000" font-family="宋体" font-size="37" font-weight="400" text-anchor="start" x="3463" y="856">(1):软件启动,不能自动重复</text>
<text alignment-baseline="after-edge" fill="#ff0000" font-family="宋体" font-size="37" font-weight="400" text-anchor="start" x="3654" y="861">(2):写入控制字CW后,输出端OUT变低</text>
<text alignment-baseline="after-edge" fill="#ff0000" font-family="宋体" font-size="37" font-weight="400" text-anchor="start" x="3463" y="956">(2):写入控制字CW后,输出端OUT变低</text>
<text alignment-baseline="after-edge" fill="#ff0000" font-family="宋体" font-size="37" font-weight="400" text-anchor="start" x="3654" y="961">(3):写入高字节计数值后,下个时钟上升沿,初值加载到计数器</text>
<text alignment-baseline="after-edge" fill="#ff0000" font-family="宋体" font-size="37" font-weight="400" text-anchor="start" x="3463" y="1056">(3):写入高字节计数值后,下个时钟上升沿,初值加载到计数器</text>
<text alignment-baseline="after-edge" fill="#ff0000" font-family="宋体" font-size="37" font-weight="400" text-anchor="start" x="3654" y="1061">(4):计数器减到0后,OUT端变为高电平,计数停止</text>
<text alignment-baseline="after-edge" fill="#ff0000" font-family="宋体" font-size="37" font-weight="400" text-anchor="start" x="3463" y="1156">(4):计数器减到0后,OUT端变为高电平,计数停止</text>
<text alignment-baseline="after-edge" fill="#ff0000" font-family="宋体" font-size="37" font-weight="400" text-anchor="start" x="3654" y="1161">(5):GATE=1,允许计数,0,停止计数,保持计数值不变</text>
<text alignment-baseline="after-edge" fill="#ff0000" font-family="宋体" font-size="37" font-weight="400" text-anchor="start" x="3463" y="1256">(5):GATE=1,允许计数,0,停止计数,保持计数值不变</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1328" y="1258">D</text>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1137" y="1353">D</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1272" y="1260">1</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1081" y="1355">1</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1342" y="1361">CLK</text>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1151" y="1456">CLK</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1272" y="1359">2</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1081" y="1454">2</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1384" y="1234">PR</text>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1193" y="1329">PR</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1362" y="1199">6</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1171" y="1294">6</text>
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<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1193" x2="1193" y1="1506" y2="1556"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1385" y="1394">CLR</text>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1194" y="1489">CLR</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1361" y="1454">3</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1170" y="1549">3</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1428" y="1258">Q</text>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1237" y="1353">Q</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1472" y="1261">5</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1281" y="1356">5</text>
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<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1263" x2="1313" y1="1456" y2="1456"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1412" y="1360">^Q</text>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1221" y="1455">^Q</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1463" y="1361">4</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1272" y="1456">4</text>
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<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="1459" y="1203">U5</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="1268" y="1298">U5</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="1421" y="1466">D_FLOP</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="1230" y="1561">D_FLOP</text>
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<polyline fill="none" points="1063 1456, 663 1456, 313 1456" stroke="#0000ff" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1154" x2="1154" y1="1211" y2="1261"/>
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<text alignment-baseline="after-edge" fill="#000000" font-family="Times New Roman" font-size="30" font-weight="700" text-anchor="start" x="1144" y="1201">1</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Times New Roman" font-size="30" font-weight="700" text-anchor="start" x="953" y="1296">1</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="1144" y="1131">U7</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="953" y="1226">U7</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="1064" y="1161">CONSTANT1</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="873" y="1256">CONSTANT1</text>
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<polyline fill="none" points="1063 1356, 963 1356" stroke="#0000ff" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1828" y="1258">D</text>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1637" y="1353">D</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1772" y="1260">1</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1581" y="1355">1</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1842" y="1361">CLK</text>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1651" y="1456">CLK</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1772" y="1359">2</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1581" y="1454">2</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1884" y="1234">PR</text>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1693" y="1329">PR</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1862" y="1199">6</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1671" y="1294">6</text>
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<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1693" x2="1693" y1="1506" y2="1556"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1885" y="1394">CLR</text>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1694" y="1489">CLR</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1861" y="1454">3</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1670" y="1549">3</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1928" y="1258">Q</text>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1737" y="1353">Q</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1972" y="1261">5</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1781" y="1356">5</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1328" y="858">D</text>
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<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="934" y="725">U9</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="743" y="820">U9</text>
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<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="504" y="731">②写入低字节后,停止计数</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="313" y="826">②写入低字节后,停止计数</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="264" y="1311">③写入高字节后,输出门控信号GATE控制计数</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="73" y="1406">③写入高字节后,输出门控信号GATE控制计数</text>
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<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="984" y="641">⑤计数减到零,停止计数</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="793" y="736">⑤计数减到零,停止计数</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="37" font-weight="400" text-anchor="start" x="3654" y="1261">(6):计数减到零,停止计数</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="37" font-weight="400" text-anchor="start" x="3463" y="1356">(6):计数减到零,停止计数</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="37" font-weight="400" text-anchor="start" x="3654" y="1361">(7):写入高字节后,输出变为低电平</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="37" font-weight="400" text-anchor="start" x="3463" y="1456">(7):写入高字节后,输出变为低电平</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1574" y="2251">③写入高字节后,输出低电平</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1383" y="2346">③写入高字节后,输出低电平</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1704" y="2051">⑤计数减为零输出高电平</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1513" y="2146">⑤计数减为零输出高电平</text>
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<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="1209" y="674">U10</text>
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<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="1914" y="1787">NOT</text>
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<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="2154" y="1761">⑥在异步置数完成后的时钟下降沿,清除置数信号,下个上升沿到来时减1</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1963" y="1856">⑥在异步置数完成后的时钟下降沿,清除置数信号,下个上升沿到来时减1</text>
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没有这种文件类型的预览
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<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="786" y="793">①写方式控制字后输出高电平</text>
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<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="4326" y="1043">输出</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="3721" y="976">输出</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="3546" y="1623">①门控信号GATE上升沿到来后的第一个时钟上升沿计数器重新加载初值</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="2941" y="1556">①门控信号GATE上升沿到来后的第一个时钟上升沿计数器重新加载初值</text>
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<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1846" y="1073">③计数减到0时输出高电平</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1241" y="1006">③计数减到0时输出高电平</text>
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<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="3046" y="2683">②写入方式控制字后停止计数,GATE上升沿到来后计数开始</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="2441" y="2616">②写入方式控制字后停止计数,GATE上升沿到来后计数开始</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="2496" y="1213">④GATE上升沿到来后的第一个时钟上升沿使得OUT输出低电平</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1891" y="1146">④GATE上升沿到来后的第一个时钟上升沿使得OUT输出低电平</text>
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<text alignment-baseline="after-edge" fill="#ff0000" font-family="宋体" font-size="40" font-weight="400" text-anchor="start" x="5026" y="843">(1)方式1是一种硬件启动,不能自动重复的计数方式</text>
<text alignment-baseline="after-edge" fill="#ff0000" font-family="宋体" font-size="40" font-weight="400" text-anchor="start" x="4421" y="776">(1)方式1是一种硬件启动,不能自动重复的计数方式</text>
<text alignment-baseline="after-edge" fill="#ff0000" font-family="宋体" font-size="40" font-weight="400" text-anchor="start" x="5026" y="943">(2):写入方式控制字后,OUT端变为高电平</text>
<text alignment-baseline="after-edge" fill="#ff0000" font-family="宋体" font-size="40" font-weight="400" text-anchor="start" x="4421" y="876">(2):写入方式控制字后,OUT端变为高电平</text>
<text alignment-baseline="after-edge" fill="#ff0000" font-family="宋体" font-size="40" font-weight="400" text-anchor="start" x="5026" y="1043">(3):计数初值写入计数器后,要等GATE信号出现正跳变(上升沿)才启动减计数,计数启动后,OUT端立即变为低电平</text>
<text alignment-baseline="after-edge" fill="#ff0000" font-family="宋体" font-size="40" font-weight="400" text-anchor="start" x="4421" y="976">(3):计数初值写入计数器后,要等GATE信号出现正跳变(上升沿)才启动减计数,计数启动后,OUT端立即变为低电平</text>
<text alignment-baseline="after-edge" fill="#ff0000" font-family="宋体" font-size="40" font-weight="400" text-anchor="start" x="5026" y="1143">(4):计数器减到零时,OUT端输出高电平</text>
<text alignment-baseline="after-edge" fill="#ff0000" font-family="宋体" font-size="40" font-weight="400" text-anchor="start" x="4421" y="1076">(4):计数器减到零时,OUT端输出高电平</text>
<text alignment-baseline="after-edge" fill="#ff0000" font-family="宋体" font-size="40" font-weight="400" text-anchor="start" x="5026" y="1243">(5):在计数过程启动后而完成之前,若GATE有发生正跳变,则计数器过程又从初值启动,OUT端的低电平不变,两次计数过程合在一起,OUT输出的负脉冲加宽了,</text>
<text alignment-baseline="after-edge" fill="#ff0000" font-family="宋体" font-size="40" font-weight="400" text-anchor="start" x="4421" y="1176">(5):在计数过程启动后而完成之前,若GATE有发生正跳变,则计数器过程又从初值启动,OUT端的低电平不变,两次计数过程合在一起,OUT输出的负脉冲加宽了,</text>
<text alignment-baseline="after-edge" fill="#ff0000" font-family="宋体" font-size="40" font-weight="400" text-anchor="start" x="5026" y="1343">(6):计数过程中若写入新的计数初值,并不会立即加载到计数器中。而要等待下一个GATE的启动信号,计数器才开始加载新的初值并开始计数。</text>
<text alignment-baseline="after-edge" fill="#ff0000" font-family="宋体" font-size="40" font-weight="400" text-anchor="start" x="4421" y="1276">(6):计数过程中若写入新的计数初值,并不会立即加载到计数器中。而要等待下一个GATE的启动信号,计数器才开始加载新的初值并开始计数。</text>
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没有这种文件类型的预览
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<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="3766" y="972">(2):写完计数初值后的第一个时钟上升沿将初值置入计数器,准备计数</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="2933" y="1122">Q</text>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="2787" y="1025">Q</text>
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<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="2936" y="1322">SR_FLOP</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="849" y="2122">S</text>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="703" y="2025">S</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="791" y="2122">1</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="645" y="2025">1</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="849" y="2222">R</text>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="703" y="2125">R</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="791" y="2222">3</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="645" y="2125">3</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="876" y="2170">CLK</text>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="730" y="2073">CLK</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="791" y="2172">2</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="883" y="2090">PR</text>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="737" y="1993">PR</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="915" y="2256">CLR</text>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="769" y="2159">CLR</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="891" y="2312">4</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="745" y="2215">4</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="933" y="2122">Q</text>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="787" y="2025">Q</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="991" y="2122">6</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="845" y="2025">6</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="920" y="2218">^Q</text>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="774" y="2121">^Q</text>
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<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="946" y="2062">U2</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1349" y="2122">S</text>
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<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1145" y="2025">1</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1349" y="2222">R</text>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1203" y="2125">R</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1383" y="2090">PR</text>
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<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="1959" y="1916">OR</text>
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<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1806" y="2672">④计数减为0,输出高电平</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1660" y="2575">④计数减为0,输出高电平</text>
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<text alignment-baseline="after-edge" fill="#800000" font-family="Times New Roman" font-size="25" font-weight="400" text-anchor="start" x="1420" y="1025">H</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="366" y="1152">②写入计数初值的高字节后的第一个时钟上升沿重新加载计数初值</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="220" y="1055">②写入计数初值的高字节后的第一个时钟上升沿重新加载计数初值</text>
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没有这种文件类型的预览
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<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="3026" y="1784">计数使能,低电平有效</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="2880" y="1594">计数使能,低电平有效</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="宋体" font-size="250" font-weight="700" text-anchor="start" x="6" y="364">计数方式5:硬件触发选通脉冲</text>
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<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="316" y="2264">①写入方式控制字,输出高电平为起始电平</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="170" y="2074">①写入方式控制字,输出高电平为起始电平</text>
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<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="366" y="1144">④GATE上升沿到来后的第一个时钟上升沿加载计数初值</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="220" y="954">④GATE上升沿到来后的第一个时钟上升沿加载计数初值</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1583" y="3042">PR</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1633" y="3074">Q</text>
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<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="3766" y="974">(1):方式5是硬件启动计数,不自动重复的计数方式。</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="3620" y="784">(1):方式5是硬件启动计数,不自动重复的计数方式。</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="3766" y="1074">(2):写入方式控制字后,输出变为高电平。</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="3620" y="884">(2):写入方式控制字后,输出变为高电平。</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="3766" y="1174">(3):GATE信号出现正向跳变的上升沿的下一个时钟上升沿重新加载初值并开始计数。</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="3620" y="984">(3):GATE信号出现正向跳变的上升沿的下一个时钟上升沿重新加载初值并开始计数。</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="3766" y="1274">(4):计数减到零时,输出变为低电平。</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="3620" y="1084">(4):计数减到零时,输出变为低电平。</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1876" y="2564">②计数减到零时输出低电平</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1730" y="2374">②计数减到零时输出低电平</text>
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<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1896" y="3074">③计数减到-1时,输出高电平</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1750" y="2884">③计数减到-1时,输出高电平</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="366" y="1454">④GATE上升沿到来后的第一个时钟上升沿开始计数</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="220" y="1264">④GATE上升沿到来后的第一个时钟上升沿开始计数</text>
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<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1406" y="1784">⑤写入工作方式字或者计数减到-1时,停止计数</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1260" y="1594">⑤写入工作方式字或者计数减到-1时,停止计数</text>
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没有这种文件类型的预览
这个 源代码变更 因为 太大 而不能显示。 你可以 浏览blob
没有这种文件类型的预览
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没有这种文件类型的预览
这个 源代码变更 因为 太大 而不能显示。 你可以 浏览blob
没有这种文件类型的预览
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