How do you make a counter in Verilog?
Electronic Counter Example
- module counter (input clk, // Declare input port for the clock to allow counter to count up.
- input rstn, // Declare input port for the reset to allow the counter to be reset to 0 when required.
- output reg[3:0] out); // Declare 4-bit output port to get the counter values.
What is a counter in Verilog?
The counter is a digital sequential circuit and here it is a 4 bit counter, which simply means it can count from 0 to 15 and vice versa based upon the direction of counting (up/down). The counter (“count“) value will be evaluated at every positive (rising) edge of the clock (“clk“) cycle.
How do you split a clock frequency in Verilog?
The Verilog clock divider is simulated and verified on FPGA.
- The frequency of the output clock_out is equal to the frequency of the input clock_out divided by the value of the DIVISOR parameter in the Verilog code.
- F(clock_out) = F(clock_in)/DIVISOR.
What is 4 bit counter?
For example, a four-bit counter can have a modulus of up to 16 (2^4). Counters are generally classified as either synchronous or asynchronous. In synchronous counters, all flip-flops share a common clock and change state at the same time.
What is 4 bit up down counter?
The SN74HC193 device is a 4-bit synchronous, reversible, up/down binary counter. This feature allows the counters to be used as modulo-N dividers simply by modifying the count length with the preset inputs. A clear (CLR) input has been provided that forces all outputs to the low level when a high level is applied.
How do you split two numbers in Verilog?
Division in verilog
- For efficient RTL if the denominator is fixed then just use 1/denominator, instead of a/3 use a*0.33. for a/2 use a>>1.
- Synthesis tools are pretty good these days and often the multiple by a single coefficient will be as small as a hand crafted operation.
What is Verilog good for?
Verilog is a Hardware Description Language; a textual format for describing electronic circuits and systems. Applied to electronic design, Verilog is intended to be used for verification through simulation, for timing analysis, for test analysis (testability analysis and fault grading) and for logic synthesis.
