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设计一个0～9的计数器，共10个周期。该计数器采用同步复位且复位为0。但是本题是希望该计数器并不是随着clk的变化而递增，而是随着一个slowena使能信号来控制增加。

还是1～10的计数器，唯一不同是同步复位为1.

代码】【HDLBits刷题】Count10..

设计一个4bit的计数器，从0～15，共16个周期。reset是同步复位且复位为0。

You're familiar with flip-flops that are triggered on the positive edge of the clock, or negative edge of the clock. A dual-edge triggered flip-flop is triggered on both edges of the clock. However, FPGAs don't have dual-edge triggered flip-flops, and alwa

For each bit in a 32-bit vector, capture when the input signal changes from 1 in one clock cycle to 0 the next. "Capture" means that the output will remain 1 until the register is reset (synchronous reset).Each output bit behaves like a SR flip-flop: The o

For each bit in an 8-bit vector, detect when the input signal changes from one clock cycle to the next (detect any edge). The output bit should be set the cycle after a 0 to 1 transition occurs.Here are some examples. For clarity, in[1] and anyedge[1] are

For each bit in an 8-bit vector, detect when the input signal changes from 0 in one clock cycle to 1 the next (similar to positive edge detection). The output bit should be set the cycle after a 0 to 1 transition occurs.Here are some examples. For clarity,

A JK flip-flop has the below truth table. Implement a JK flip-flop with only a D-type flip-flop and gates. Note: Qold is the output of the D flip-flop before the positive clock edge.module top_module ( input clk, input j, input k, output Q

Given the finite state machine circuit as shown, assume that the D flip-flops are initially reset to zero before the machine begins.Build this circuit.开始的时候置0，所以一开始所有的Q都得是0；这个地方放写完之后有个疑惑，就是w1、w2、w3是不是定义成reg类型会更好（reg类型是通过的） ，但是定义成wire类型也是通过了的：mod

Consider the n-bit shift register circuit shown below:Write a Verilog module named top_module for one stage of this circuit, including both the flip-flop and multiplexers.1、第一种方法是通过抽象方法，从电路最后面看，写出Q输出：module top_module ( input clk, input w, R

Implement the following circuit:图中有一个 D 触发器与一个异或门，触发器的输出 q 和输入信号 in 一起作为异或门的输入。异或门的输入作为触发器的输入 dmodule top_module ( input clk, input in, output reg out); always @(posedge clk) begin out <= in ^ out; endendmodule.

Implement the following circuit:写一个同步复位的D触发器module top_module ( input clk, input d, input r, // synchronous reset output q); always @(posedge clk)begin if(r) q <= 0; else q <= d;.

Implement the following circuit:AR 代表 asynchronous reset，所以这是一个带有异步复位的 D 触发器，我们在先前的题目中讨论过异步复位的问题。图中的三角形代表时钟，不再用 CLK 标出。module top_module ( input clk, input d, input ar, // asynchronous reset output q); always @(posedge c

Implement the following circuit:Note that this is a latch, so a Quartus warning about having inferred a latch is expected.做一个D触发器module top_module ( input d, input ena, output q); always @(*)begin if(ena) q = d

Create 16 D flip-flops. It's sometimes useful to only modify parts of a group of flip-flops. The byte-enable inputs control whether each byte of the 16 registers should be written to on that cycle. byteena[1] controls the upper byte d[15:8], while byteena[

Create 8 D flip-flops with active high asynchronous reset. All DFFs should be triggered by the positive edge of clk.要求创建一个异步清零端的D触发器module top_module ( input clk, input areset, // active high asynchronous reset input [7:0] d, output

Create 8 D flip-flops with active high synchronous reset. The flip-flops must be reset to 0x34 rather than zero. All DFFs should be triggered by the negative edge of clk.实现具有高电平同步复位的8个D触发器，同时复位值为0x34，下降沿触发。module top_module ( input clk, input

Create 8 D flip-flops with active high synchronous reset. All DFFs should be triggered by the positive edge of clk.写一个带reset高电平有效复位的D触发器（时钟是上升沿触发）另外最好把在过程语句中的变量设置成reg格式，比如此处的q。（赋值语句左边的）module top_module ( input clk, input reset, /

Create 8 D flip-flops. All DFFs should be triggered by the positive edge ofclk.module top_module ( input clk, input [7:0] d, output [7:0] q); always @(posedge clk) q <= d;endmodule

A D flip-flop is a circuit that stores a bit and is updated periodically, at the (usually) positive edge of a clock signal.D flip-flops are created by the logic synthesizer when aclocked always blockis used (Seealwaysblock2). A D flip-flop is the si...

For the following Karnaugh map, give the circuit implementation using one 4-to-1 multiplexer and as many 2-to-1 multiplexers as required, but using as few as possible. You are not allowed to use any other logic gate and you must useaandbas the multiple...

A single-output digital system with four inputs (a,b,c,d) generates a logic-1 when 2, 7, or 15 appears on the inputs, and a logic-0 when 0, 1, 4, 5, 6, 9, 10, 13, or 14 appears. The input conditions for the numbers 3, 8, 11, and 12 never occur in this syst

Implement the circuit described by the Karnaugh map below.Try to simplify the k-map before coding it. Try both product-of-sums and sum-of-products forms. We can't check whether you have the optimal simplification of the k-map. But we can check if you

Implement the circuit described by the Karnaugh map below.Try to simplify the k-map before coding it. Try both product-of-sums and sum-of-products forms. We can't check whether you have the optimal simplification of the k-map. But we can check if you

Implement the circuit described by the Karnaugh map below.Try to simplify the k-map before coding it. Try both product-of-sums and sum-of-products forms. We can't check whether you have the optimal simplification of the k-map. But we can check if you

Implement the circuit described by the Karnaugh map below.Try to simplify the k-map before coding it. Try both product-of-sums and sum-of-products forms. We can't check whether you have the optimal simplification of the k-map. But we can check if you

You are provided with a BCD (binary-coded decimal) one-digit adder namedbcd_faddthat adds two BCD digits and carry-in, and produces a sum and carry-out.module bcd_fadd ( input [3:0] a, input [3:0] b, input cin, output cout, o..

Create a 100-bit binary adder. The adder adds two 100-bit numbers and a carry-in to produce a 100-bit sum and carry out.Expected solution length: Around 1 line.弄一个两个100-bit相加的全加器1、第一种module top_module( input [99:0] a, b, input cin, ou

Assume that you have two 8-bit 2's complement numbers, a[7:0] and b[7:0]. These numbers are added to produce s[7:0]. Also compute whether a (signed) overflow has occurred.本题讨论的是有符号数相加的溢出问题中，需要实现一个 2 进制 8bit 有符号数加法器，加法器将输入的两个 8bit数补码相加，产生相加之和以及进位。modul

Implement the following circuit:("FA" is a full adder)1、第一种，就是采用实例化模块的方式来进行：module top_module ( input [3:0] x, input [3:0] y, output [4:0] sum); wire cout0,cout1,cout2; fadd U1(x[0],y[0],0,cout0,sum[0]); fadd U2(x[1],y[1],

Now that you know how to build afull adder, make 3 instances of it to create a 3-bit binary ripple-carry adder. The adder adds two 3-bit numbers and a carry-in to produce a 3-bit sum and carry out. To encourage you to actually instantiate full adders, als.

Create a full adder. A full adder adds three bits (including carry-in) and produces a sum and carry-out.Expected solution length: Around 2 lines.1、第一种，拼接：module top_module( input a, b, cin, output cout, sum ); assign {cout,sum} = a + b

Create a half adder. A half adder adds two bits (with no carry-in) and produces a sum and carry-out.Expected solution length: Around 2 lines.1、第一种，利用拼接括号module top_module( input a, b, output cout, sum ); assign {cout,sum} = a + b;endm

Create a 4-bit wide, 256-to-1 multiplexer. The 256 4-bit inputs are all packed into a single 1024-bit input vector. sel=0 should select bits in[3:0], sel=1 selects bits in[7:4], sel=2 selects bits in[11:8], etc.Expected solution length: Around 1–5 lines.

Create a 1-bit wide, 256-to-1 multiplexer. The 256 inputs are all packed into a single 256-bit input vector. sel=0 should select in[0], sel=1 selects bits in[1], sel=2 selects bits in[2], etc.Expected solution length: Around 1 line.256选1数据选择器，不用case，不.

See also the shorter version:Gates and vectors.You are given a 100-bit input vector in[99:0]. We want to know some relationships between each bit and its neighbour:out_both: Each bit of this output vector should indicate whetherboththe corresponding...

You are given a four-bit input vector in[3:0]. We want to know some relationships between each bit and its neighbour:out_both: Each bit of this output vector should indicate whetherboththe corresponding input bit and its neighbour to theleft(higher i...

A heating/cooling thermostat controls both a heater (during winter) and an air conditioner (during summer). Implement a circuit that will turn on and off the heater, air conditioning, and blower fan as appropriate.The thermostat can be in one of two mode

Suppose you are designing a circuit to control a cellphone's ringer and vibration motor. Whenever the phone needs to ring from an incoming call (inputring), your circuit must either turn on the ringer (outputringer= 1) or the motor (outputmotor= 1), b...