modulepr_en(input[7:0]a,input[7:0]b,input[7:0]c,input[7:0]d,input[1:0]sel,outputreg[7:0]out);always @(aorborcordorsel)beginif(sel==2'b00)out<=a;elseif(sel==2'b01)out<=b;elseif(sel==2'b10)out<=c;elseout<=d;endendmodule Hardware Schematic Testbench moduletb_4to1_...
3.在一个设计开始就要考虑到地电平或高电平复位、同步或异步复位、上升沿或下降沿触发等问题,在所有模块中都要遵守它 4.在不同的情况下用if和case,最好少用if的多层嵌套(1层或2层比较合适,当在3层以上时,最好修改写法,因为这样不仅可以reduce area,而且可以获得好的timing) 5.在锁存一个信号或总线时要小心,...
么了吧,总之这种形式表示zn=~(a1 && a2);你一定已经想到类似的运算符还有"not","and","or","nor","xor"了吧;除了"not",括号里的信号数可以任意,例如or (z,f,g,h)表示z=f || g || h,并且延时是3个单位时间,#x表示延时x个单位时间; endmodule *加法器的verilog描述如下: module ad03d1(A,B...
Build a priority encoder for 8-bit inputs. Given an 8-bit vector, the output should report the first (least significant) bit in the vector that is 1. Report zero if the input vector has no bits that are high. For example, the input 8'b10010000 should output 3'd4, because bit[4]...
33. Priority encoder 小知识点:优先编码器是一种组合电路,当给定一个输入位向量时,输出该向量从右往左数(从低位到高位)第一个1的位置。例如,输入8'b10010000时,8位优先级编码器将输出3'd4,因为位[4]是从低到高第一个为1的位。(注:从右到左,最低的那位是第0位。) ...
为 8 位输入构建优先级编码器（priority encoder ）。给定一个 8 位向量，输出应报告向量中第一个（...
#8:不要使用#0延迟的赋值。 #9:在VERILOG语法中, if...else if ... else 语句是有优先级的,一般说来第一个IF的优先级最高,最后一个ELSE的优先级最低。如果描述一个编码器,在XILINX的XST综合参数就有一个关于优先级编码器硬件原语句的选项Priority Encoder Extraction. 而CASE语句是"平行"的结构,所有的CAS...
Build a priority encoder for 8-bit inputs. Given an 8-bit vector, the output should report the first bit in the vector that is1. Report zero if the input vector has no bits that are high. For example, the input8'b10010000should output3'd4, because bit[4] is first bit that is ...
Inferring latch: It is very common for synthesis tool to infer latch due to incomplete if-else statement. Also, incomplete case statement or missing default in case statement also generates latches. The designers must be very careful while write RTL code for if-else or case blocks. ...
BrianHGinc/BrianHG-DDR3-Controller Star78 Code Issues Pull requests DDR3 Controller v1.65, 16 read/write ports, configurable widths, priority, auto-burst size & cache on each port. VGA/HDMI multiwindow video controller with alpha-blended layers. Docs & TBs included. ...