Sequential Verulog Topics part 10 pps

... c_out = c; The always statement The always statement can be used to infer sequential and combinational logic. For sequential logic, the always statement must be controlled by the change in

Ngày tải lên: 01/07/2014, 21:20

... routines can do the following: • Read information about a particular object from the internal data representation • Write information about a particular object into the internal data representation ... C1 > . "my_stop_finish.v", 14: warning! Bad arguments to $my_stop_finish at time 10 Mymessage: Simulation finished at time 15 in instance top  Example 13-1 Verilog De...

Ngày tải lên: 01/07/2014, 21:20

... would consider design constraints such as timing, area, testability, and power. The designer would partition the design into high-level blocks, draw them on a piece of paper or a computer terminal, ... represent the second generation of Verilog PLI. Access routines can read and write information about a particular object from/to the design. Access routines start with the prefix acc_. Acce...

Ngày tải lên: 01/07/2014, 21:20

... combination of the inputs. • Sequential UDPs are used to define blocks with timing controls. Blocks such as latches or flipflops can be described with sequential UDPs. Sequential UDPs are modeled ... table is the most important component of UDP specification. • UDPs can be combinational or sequential. Sequential UDPs can be edge- or level-sensitive. • Combinational UDPs are us...

Ngày tải lên: 01/07/2014, 21:20

... example of a lumped delay is shown in Figure 10- 2 and Example 10- 2 . Figure 10- 2. Lumped Delay The above example is a modification of Figure 10- 1 . In this example, we computed the maximum ... In Figure 10- 3 , we take the example in Figure 10- 1 and compute the pin-to-pin delays for each input/output p ath. Figure 10- 3. Pin-to-Pin Delay Pin-to-pin delays for standar...

Ngày tải lên: 01/07/2014, 21:20

... described, using specify blocks. Pin-to-pin delay specification is discussed in detail in Chapter 10 , Timing and Delays, and is identical for switch-level modules.  11.1 Switch-Modeling Elements

Ngày tải lên: 01/07/2014, 21:20

... The output of the simulation is shown below. 0 OUT = 1, A = 0, B = 0 5 OUT = 0, A = 0, B = 1 10 OUT = 0, A = 1, B = 0 15 OUT = 0, A = 1, B = 1 Thus we designed our own nor gate. If designers

Ngày tải lên: 01/07/2014, 21:20

... UDP basics In this section, we describe parts of a UDP definition and rules for UDPs. 12.1.1 Parts of UDP Definition Figure 12-1 shows the distinct parts of a basic UDP definition in pseudo ... endprimitive //end of udp_and definition Compare parts of udp_and defined above with the parts discussed in Figure 12-1 . The missing parts are that the output is not declared as reg and ... i...

Ngày tải lên: 01/07/2014, 21:20

... parameter s10 = 2'b10; parameter s15 = 2'b11; //Combinational logic function [2:0] fsm; begin fsm_newspaper = 1'b0; fsm_NEXT_STATE = s5; end s10: //state = s10 begin ... defined abc _100 technology in Section 14.4.1 , RTL to Gates. We will use abc _100 as the target technology library. abc _100 contains the following library cells: //Library cells for abc...

Ngày tải lên: 01/07/2014, 21:20

... bit stream as an input at the pin in. An output pin match is asserted high each time a pattern 101 01 is detected. A reset pin initializes the circuit synchronously. Input pin clk is used to clock ... 14.9 Exercises 1: A 4-bit full adder with carry lookahead was defined in Example 6-5 on p age 109 , using an RTL description. Synthesize the full adder, using a technology library avail...

Ngày tải lên: 01/07/2014, 21:20