To multiply a clock frequency, generate rational frequency ratios and phase shifted clocks, you need an analog VCO as part of the PLL design. It's provided e.g. with most FPGA, but not with MAX II. Altera once advertised a PLL block for MAX V series, but...
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In my experience you result in a relativ low core frequency in the 10MHz range. To make a division it is much faster to multiply with the inverse divisior. OK, this works only if the divisior is fix, or is changed slowly. You may add the "set_multicycle_pa...
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For example, if frequency of CLK1 and CLK2 are related by ratio of 2/3:1 then you can multiply both sides of the ratio by 3 to get the nice integer ratio of 2:3. So, every 2 cycles of CLK1 (which is equivalent to 3 cycles of CLK2), rising-edges will align. Are you specifi...
set_false_path -from * -to [get_ports {phy_reset_n phy_col phy_crs}] # input XTAL clock 50MHz / 20ns create_clock -name clk50mhz -period 20 [get_ports {clk50mhz}] # clk2500 create_generated_clock -name clk_2500 -source [get_ports {phy_rxclk}] -divide_by 50 -multiply_by...
A simple test firmware. This runs the basic tests fromtests/, some C code, tests IRQ handling and the multiply PCPI core. All the code infirmware/is in the public domain. Simply copy whatever you can use. tests/ Simple instruction-level tests fromriscv-tests. ...
alreadybeenintheWORKfolder. L4:read_verilog-containeri-libnameWORK-01 {/export/home/fangfang/r_i/txdsss/syn/ntl/Dsss_TX.vn} Putsyour.vnfileintothecontainer“i”.“i”meansimplementation. OthersaresimilartotheL2. L5:read_db {/eda/SMIC18/verisilicon/version24/FEView_STDIO/STD/Synops ...
16bit or 8bit multiply should only use 0.5 DSP. I have try to implement two char type MAC, and the result will be store into int type. The DSP
12.5Mhz will be sure to finish the multiply operation. the only problem is that you need 8 multiplyer. I am poor in English , if you can't understand what i said , I am sorry. send E_mail to me ,I will try my best to explain that. good luck Tra...