Тактовый сигнал, который распространяется по всему проекту, берется с блока PLL. Он умножен на 4 от значения частоты на соответствующей ножке ПЛИС и теперь все модули внутри ПЛИС работают на частоте 100МГц . Так гарантировано получаем один и тот же синхросигнал во всей схеме. Из книжки ПЛИС Xilinx Тарасова И. Е.;
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@ -21,7 +21,7 @@ applicable agreement for further details.
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(header "graphic" (version "1.4"))
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(pin
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(input)
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(rect 376 160 552 176)
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(rect 376 -352 552 -336)
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(text "INPUT" (rect 133 0 161 10)(font "Arial" (font_size 6)))
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(text "FPGA_CLK" (rect 9 0 65 12)(font "Arial" ))
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(pt 176 8)
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@ -34,7 +34,7 @@ applicable agreement for further details.
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(line (pt 117 12)(pt 121 8))
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)
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(text "VCC" (rect 136 7 156 17)(font "Arial" (font_size 6)))
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(annotation_block (location)(rect 320 160 368 176))
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(annotation_block (location)(rect 320 -352 368 -336))
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)
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(pin
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(input)
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@ -2796,10 +2796,6 @@ applicable agreement for further details.
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(pt 904 -56)
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(bus)
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)
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(connector
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(pt 608 -344)
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(pt 664 -344)
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)
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(connector
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(pt 1016 -312)
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(pt 928 -312)
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@ -2816,18 +2812,6 @@ applicable agreement for further details.
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(pt 576 -328)
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(pt 576 -312)
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)
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(connector
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(pt 608 -424)
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(pt 1536 -424)
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)
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(connector
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(pt 608 -424)
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(pt 608 -344)
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)
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(connector
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(pt 608 -344)
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(pt 608 -208)
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)
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(connector
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(pt 1656 -424)
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(pt 1840 -424)
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@ -3064,18 +3048,6 @@ applicable agreement for further details.
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(pt 1856 1464)
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(bus)
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)
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(connector
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(pt 608 120)
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(pt 608 168)
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)
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(connector
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(pt 608 320)
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)
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(connector
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(pt 608 168)
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)
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(connector
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(pt 704 104)
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@ -3112,6 +3084,34 @@ applicable agreement for further details.
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(pt 720 880)
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(pt 552 880)
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)
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(connector
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(pt 608 120)
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(pt 608 320)
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)
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(connector
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(pt 608 -424)
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(pt 608 -208)
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)
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(connector
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(pt 552 -344)
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(pt 664 -344)
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)
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(connector
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(pt 928 -344)
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(pt 1016 -344)
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)
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(connector
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(pt 1016 -344)
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(pt 1016 -424)
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)
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(connector
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(pt 608 -424)
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(pt 1016 -424)
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)
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(connector
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(pt 1016 -424)
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(pt 1536 -424)
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)
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(junction (pt 608 576))
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(junction (pt 1000 592))
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(junction (pt 984 608))
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@ -3140,7 +3140,6 @@ applicable agreement for further details.
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(junction (pt 984 1040))
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(junction (pt 968 1056))
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(junction (pt 952 1072))
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(junction (pt 608 168))
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(junction (pt 984 56))
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(junction (pt 968 72))
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(junction (pt 952 88))
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@ -3159,7 +3158,6 @@ applicable agreement for further details.
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(junction (pt 608 -208))
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(junction (pt 904 -128))
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(junction (pt 624 -104))
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(junction (pt 608 -344))
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(junction (pt 608 1256))
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(junction (pt 1000 1272))
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(junction (pt 984 1288))
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@ -3173,3 +3171,4 @@ applicable agreement for further details.
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(junction (pt 1488 1008))
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(junction (pt 1488 1464))
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(junction (pt 608 896))
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(junction (pt 1016 -424))
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