39 lines
1.4 KiB
Plaintext
39 lines
1.4 KiB
Plaintext
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# clock pin for Atlys rev C board
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NET "clk" LOC = "L15" | IOSTANDARD = LVCMOS33 ;
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# 100 MHz
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NET "clk" TNM_NET = "clk" ;
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TIMESPEC "TS_clk" = PERIOD "clk" 10 ns HIGH 50% ;
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# Reset button
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NET "resetn" LOC = "T15" | IOSTANDARD = LVCMOS33 ;
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# LEDs
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NET "led<0>" LOC = "U18" | IOSTANDARD = LVCMOS33 | SLEW = QUIETIO ;
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NET "led<1>" LOC = "M14" | IOSTANDARD = LVCMOS33 | SLEW = QUIETIO ;
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NET "led<2>" LOC = "N14" | IOSTANDARD = LVCMOS33 | SLEW = QUIETIO ;
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NET "led<3>" LOC = "L14" | IOSTANDARD = LVCMOS33 | SLEW = QUIETIO ;
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NET "led<4>" LOC = "M13" | IOSTANDARD = LVCMOS33 | SLEW = QUIETIO ;
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NET "led<5>" LOC = "D4" | IOSTANDARD = LVCMOS33 | SLEW = QUIETIO ;
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NET "led<6>" LOC = "P16" | IOSTANDARD = LVCMOS33 | SLEW = QUIETIO ;
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NET "led<7>" LOC = "N12" | IOSTANDARD = LVCMOS33 | SLEW = QUIETIO ;
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# USB serial port J17
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NET "uartrx" LOC = "A16" | IOSTANDARD = LVCMOS33 ;
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NET "uarttx" LOC = "B16" | IOSTANDARD = LVCMOS33 | SLEW = SLOW ;
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# Audio
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NET "ac97_bitclk" LOC = "L13" | IOSTANDARD = LVCMOS33 ;
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NET "ac97_sdi" LOC = "T18" | IOSTANDARD = LVCMOS33 ;
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NET "ac97_sdo" LOC = "N16" | IOSTANDARD = LVCMOS33 ;
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NET "ac97_sync" LOC = "U17" | IOSTANDARD = LVCMOS33 ;
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NET "ac97_rst" LOC = "T17" | IOSTANDARD = LVCMOS33 ;
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# Constrain bitclk to 20 MHz (actual frequency is 12.288 MHz)
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NET "ac97_bitclk" PERIOD = 50 ns HIGH 50% ;
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OFFSET = IN 10 ns VALID 20 ns BEFORE "ac97_bitclk" FALLING ;
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OFFSET = OUT 15 ns AFTER "ac97_bitclk" RISING ;
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