Gray code counters (having one bit change per counter transition) are often used in FIFO design and digital communication. Here I will show two styles gray code counter. Style #1 First style gray code counter uses a single set of flip-flops as the Gray code register with accompanying Gray-t...
Gray code counters (having one bit change per counter transition) are often used in FIFO design and digital communication. Here I will show two styles gray code counter. Style #1 First style gray code counter uses a single set of flip-flops as the Gray code register with accompanying Gray-t...
要写好Verilog HDL,得要琢磨清楚:用Verilog HDL写的code不是“程序”(除了仿真外它并不会被任何东西execute),而是可以被EDA软件跑出来(synthesize&implement)的电路。琢磨清楚之后,就能暸解为什么Verilog HDL语法像C,用法却完全不同了。 为了让电路的输出与时钟准确对齐,一个比较好的三段式状态机(FSM)应当是一个Moo...
waits for the counters to finish counting, and notifies the user and waits for the user to acknowledge the timer. In this problem, implement just the finite-state machine that controls the timer. The data path (counters and some comparators) are not included here. The serial data is availabl...
Here is the result of the simulation count of the number of positive and negative pulses. for N=7. Explanation 1. A ring counter is implemmented using begin count <= count << 1; count[0] <= count[8]; end If you look at the counters in the code, you need to check the time ...
Sine Wave generation in Verilog can be achieved using a lookup table method or by using mathematical approximations with counters and phase accumulators. 24. When can Race Conditions occur in Verilog? Race conditions occur in Verilog when the output of a logic circuit depends on the timing or se...
For this example, let’s consider a design which requires two synchronous counters. One of these counters is 8 bits wide whilst the other is 12 bits wide. To implement this circuit, we could write two different counter components which have different widths. However, this is an inefficient wa...
Even long counters are very efficient(速度高) Low gate count Hi g h sp eed gp Easy to test for faults - typically only need 2*n clocks(容易测试错误) CONS: Pr i m iti ve forms must b e i n iti a li zed to va lid s ta te(本原形式必须初始化为有效状态) ...
[ck_cntr%TDLLK] = tcl_i; // update timers/counters tch_i <= $time - tm_ck_pos; end tm_ck_neg = $time; end // on die termination if (odt_en || dyn_odt_en) begin // odt pin is disabled during self refresh if (!in_self_refresh && diff_ck) begin if ($time - tm_odt...
MOD-N CountersMOD-3 counterMOD-5 counterMOD-6 counterMOD-7 counterMOD-8 counterMOD-9 counterMOD-11 counterMOD-12 counterGray counterThe gray code is a type of binary number ordering such that each number differes from its previous and the following number by exactly 1-bit. Gray codes are...