logic. This is becausea gated latch needs to update its outputs continuously when thegate is "...
The next interesting structure is a transparent latch; it will pass the input to the output when the gate signal is set for “pass-through”, and captures the input and stores it upon transition of the gate signal to “hold”. The output will remain stable regardless of the input signal ...
(1) 8’hab 表示 8bit 的十六进制数，换算成二进制是 1010_1011；(2) 8’d171 表示 8bit 的十...
由于always语句可以描述边沿变化，在设计时序电路中得到广泛应用。always语句中还可以使用if、case、for循环...
20.Timing Analysis does not support the analysis of latches as synchronous elements for the currently selected device family 原因:用analyze_latches_as_synchronous_elements setting可以让 Quaruts II来分析同步锁存,但目前的器件不支持这个特性 措施:无须理会.时序分析可能将锁存器分析成回路.但并不一定分析正...
目前的两种用法: always @(*) always @(posedge clk) Build an XOR gate three ways, using an assign statement, a combinational always block, and a clocked always
always block describes a simple OR gate with inputsAandB, and outputC. This code tells the simulator to re-evaluate the value of outputC, whenever the signalAorBchanges. It is not entirely straightforward, but you can see how this essentially describes the behaviour of an OR gate in ...
半加器程序实例/* Gate-level description of a half adder */moduleHalfAdder_GL(A,B,Sum,Carry);...
Synthesis tools, such as Synopsys Design Compiler and Xilinx Vivado, convert the Verilog code into a gate-level netlist or an FPGA bitstream, which can then be used for implementation on an ASIC or FPGA, respectively. These tools also perform optimizations to meet design constraints, such as ...
Use a 32-bit wide XOR gate to invert the b input whenever sub is 1. (This can also be viewed as b[31:0] XORed with sub replicated 32 times. See replication operator.). Also connect the sub input to the carry-in of the adder. ...