提交 2d8f37a8 创建 作者: 李川's avatar 李川

Merge branch '8237-simplified' into 'master'

修改8237原理图 See merge request !4
......@@ -2,18 +2,13 @@
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<file relativepath="dmac.dlsche"/>
<file relativepath="fm.dlsche"/>
<file relativepath="ps.dlsche"/>
<file relativepath="regs.dlsche"/>
<file relativepath="write_read.dlsche"/>
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<file relativepath="8237A.dlsche"/>
<file relativepath="README.md"/>
<file relativepath="8237A.pdf"/>
<file relativepath="channel.dlsche"/>
<file relativepath="fmall.dlsche"/>
<file relativepath="regs.dlsche"/>
<file relativepath="write_read.dlsche"/>
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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
# 说明
Intel 8237A DMA 控制器
# Datasheet
[8237A.pdf](8237A.pdf)
# 原理图
![raw svg](8237A.dlsche.svg)
\ No newline at end of file
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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
这个 源代码变更 因为 太大 而不能显示。 你可以 浏览blob
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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="1569" y="751">S2</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="1569" y="811">S4</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="39" y="2431">状态S1:有通道请求,进入该状态,等待总线控制权</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="39" y="2531">状态S2:进入DMA传送,将地址A7~A0输出到地址总线上</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="39" y="2631">状态S3:发出DMA响应信号DACK,把数据送到数据总线上</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="39" y="2731">状态S4:发出写命令,把数据线上的数据写入存储器或I/O外设</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="39" y="2831">状态S5:完成数据传送,读写信号无效</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="49" y="2271">一个DMA操作周期内,地址不需要改变</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="49" y="2351">空闲状态S0:无通道请求,始终停留在该状态</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="819" y="1341">REQ</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="819" y="1281">高电平,有通道请求</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="169" y="2031">低电平,插入等待状态(S3状态保持)</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1349" y="1671">S</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1419" y="1681">REQ</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1519" y="1681">HLDA</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1619" y="1681">READY</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1839" y="1671">TT2</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1939" y="1671">TT1</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="2039" y="1671">TT0</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="1339" y="1861">S0</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="1729" y="1861">S1</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="1729" y="2451">S0</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="2039" y="1851">1</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1539" y="1951">1</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1939" y="1961">1</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1939" y="2051">1</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="2039" y="2051">1</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1839" y="2161">1</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1839" y="2261">1</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1639" y="2261">0</text>
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<text alignment-baseline="after-edge" fill="#ff0000" font-family="宋体" font-size="60" font-weight="700" text-anchor="start" x="1239" y="2681">只考虑块传送</text>
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添加文件
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<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="1073" y="2803">74LS139D</text>
<text alignment-baseline="after-edge" fill="#800000" font-family="Times New Roman" font-size="25" font-weight="400" text-anchor="start" x="1269" y="2683">wrt</text>
<text alignment-baseline="after-edge" fill="#800000" font-family="Times New Roman" font-size="25" font-weight="400" text-anchor="start" x="1269" y="2713">rdt</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="12" font-weight="400" text-anchor="start" x="1439" y="2683">写传送</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="12" font-weight="400" text-anchor="start" x="1439" y="2713">读传送</text>
<text alignment-baseline="after-edge" fill="#800000" font-family="Times New Roman" font-size="25" font-weight="400" text-anchor="start" x="1569" y="883">S4</text>
<text alignment-baseline="after-edge" fill="#800000" font-family="Times New Roman" font-size="25" font-weight="400" text-anchor="start" x="2219" y="1283">HRQ</text>
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<path d="M1983 1484" fill="none" stroke="#ff0000" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
<path d="M1974 1412 C 1982 1425, 1983 1455, 1983 1455" fill="none" stroke="#000000" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
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<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="2020" y="1401">U4</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="1997" y="1547">NOR3</text>
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<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="2279" x2="2219" y1="1553" y2="1553"/>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="2279" x2="2219" y1="1583" y2="1583"/>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="2409" x2="2469" y1="1543" y2="1543"/>
<polyline fill="none" points="2279 1501, 2359 1501" stroke="#000000" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
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<polyline fill="none" points="2356 1595, 2281 1595" stroke="#000000" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
<polyline fill="none" points="2279 1487, 2279 1608" stroke="#000000" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="2319" y="1490">U5</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="2294" y="1646">AND3</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="1919" y="1423">S0</text>
<text alignment-baseline="after-edge" fill="#800000" font-family="Times New Roman" font-size="25" font-weight="400" text-anchor="start" x="1919" y="1453">rdt</text>
<text alignment-baseline="after-edge" fill="#800000" font-family="Times New Roman" font-size="25" font-weight="400" text-anchor="start" x="1919" y="1483">m_to_m</text>
<text alignment-baseline="after-edge" fill="#800000" font-family="Times New Roman" font-size="25" font-weight="400" text-anchor="start" x="2219" y="1553">HLDA</text>
<text alignment-baseline="after-edge" fill="#800000" font-family="Times New Roman" font-size="25" font-weight="400" text-anchor="start" x="2219" y="1583">wrt</text>
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<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1979" x2="1919" y1="1703" y2="1703"/>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1979" x2="1919" y1="1733" y2="1733"/>
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<polyline fill="none" points="1975 1752, 2026 1752" stroke="#000000" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
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<path d="M2027 1752 C 2095 1752, 2105 1706, 2105 1706" fill="none" stroke="#000000" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
<path d="M1982 1734" fill="none" stroke="#ff0000" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
<path d="M1983 1734" fill="none" stroke="#ff0000" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
<path d="M1974 1662 C 1982 1675, 1983 1705, 1983 1705" fill="none" stroke="#000000" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
<path d="M1972 1752 C 1980 1733, 1983 1704, 1983 1704" fill="none" stroke="#000000" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
<polyline fill="none" points="1978 1661, 1974 1661" stroke="#000000" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
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<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="2020" y="1651">U6</text>
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<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="2279" x2="2219" y1="1833" y2="1833"/>
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<path d="M2357 1751 A 47 47 0 1 1 2357 1844" fill="none" stroke="#000000" stroke-linecap="round" stroke-width="5"/>
<polyline fill="none" points="2356 1845, 2281 1845" stroke="#000000" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
<polyline fill="none" points="2279 1737, 2279 1858" stroke="#000000" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="2319" y="1740">U7</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="2294" y="1896">AND3</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="1919" y="1673">S0</text>
<text alignment-baseline="after-edge" fill="#800000" font-family="Times New Roman" font-size="25" font-weight="400" text-anchor="start" x="1919" y="1703">wrt</text>
<text alignment-baseline="after-edge" fill="#800000" font-family="Times New Roman" font-size="25" font-weight="400" text-anchor="start" x="1919" y="1733">m_to_m</text>
<text alignment-baseline="after-edge" fill="#800000" font-family="Times New Roman" font-size="25" font-weight="400" text-anchor="start" x="2219" y="1803">HLDA</text>
<text alignment-baseline="after-edge" fill="#800000" font-family="Times New Roman" font-size="25" font-weight="400" text-anchor="start" x="2219" y="1833">rdt</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="1999" y="1887">U8</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="1979" y="2019">NOT</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="2319" y="1940">U11</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="2294" y="2096">AND3</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="1919" y="1923">S0</text>
<text alignment-baseline="after-edge" fill="#800000" font-family="Times New Roman" font-size="25" font-weight="400" text-anchor="start" x="2219" y="2003">HLDA</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="1979" y="2269">NOT</text>
<text alignment-baseline="after-edge" fill="#800000" font-family="Times New Roman" font-size="25" font-weight="400" text-anchor="start" x="1919" y="2173">S3</text>
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<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1979" x2="1919" y1="2373" y2="2373"/>
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<polyline fill="none" points="1975 2392, 2026 2392" stroke="#000000" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
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<path d="M2027 2392 C 2095 2392, 2105 2346, 2105 2346" fill="none" stroke="#000000" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
<path d="M1979 2303" fill="none" stroke="#ff0000" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
<path d="M1975 2301 C 1994 2344, 1974 2391, 1974 2391" fill="none" stroke="#000000" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="2020" y="2293">U15</text>
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<polyline fill="none" points="1978 2451, 2028 2451" stroke="#000000" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
<polyline fill="none" points="1975 2542, 2026 2542" stroke="#000000" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
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<path d="M1979 2453" fill="none" stroke="#ff0000" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
<path d="M1975 2451 C 1994 2494, 1974 2541, 1974 2541" fill="none" stroke="#000000" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="2020" y="2443">U16</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="2000" y="2587">NOR</text>
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<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1979" x2="1919" y1="2673" y2="2673"/>
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<polyline fill="none" points="1978 2601, 2028 2601" stroke="#000000" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
<polyline fill="none" points="1975 2692, 2026 2692" stroke="#000000" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
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<path d="M1979 2603" fill="none" stroke="#ff0000" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
<path d="M1975 2601 C 1994 2644, 1974 2691, 1974 2691" fill="none" stroke="#000000" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="2020" y="2593">U20</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="2000" y="2737">NOR</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="2469" y="1253">1</text>
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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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<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="2170" y="2535">1,表示存储器到存储器的传送</text>
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没有这种文件类型的预览
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