Sequential Verulog Topics part 7 ppt

... 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

... 11, t_z0 = 13; specparam t_0x = 4, t_x1 = 13, t_1x = 5; specparam t_x0 = 9, t_xz = 11, t_zx = 7; (clk => q) = (t_01, t_10, t_0z, t_z1, t_1z, t_z0, t_0x, t_x1, t_1x, t_x0, t_xz, t_zx ); ... input a, b, c, d; wire e, f; //Delay is distributed to each gate. and #5 a1(e, a, b); and #7 a2(f, c, d); and #4 a3(out, e, f); endmodule //Distributed delays in data flow definition...

Ngày tải lên: 01/07/2014, 21:20

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 ... d...

Ngày tải lên: 01/07/2014, 21:20

... (Chuang and Eisenthal, 1 971 ; Fleming et al., 1 976 ; 1 977 ; Porter et al., 1 977 ; Moog et al., 1982; Spears and Cramer, 1 978 ; Millar et al., 1 979 ; von Jena and Lessing, 1 979 a, b; 1981; Rice and Kenney- Wallace, ... 0031-90 07 Paunov V.N. 2003. Novel Method for Determining the Three-Phase Contact Angle of Colloid Particles Adsorbed at Air−Water and Oil−Water Interfaces . Langmui...

Ngày tải lên: 19/06/2014, 10:20

... 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

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

... for(i=0; i < =7; i = i + 1) {c, sum[i]} = a[i] + b[i] + c; // builds an 8-bit ripple adder c_out = c; The always statement The always statement can be used to infer sequential and combinational ... 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 the va...

Ngày tải lên: 01/07/2014, 21:20

... input of C2. The CMOS inverters can be defined by using MOS switches, as shown in Figure 11 -7 . Figure 11 -7. CMOS Inverter We are now ready to write the Verilog description for the CMOS latch. ... Verilog module description for the CMOS inverter from the switch-level circuit diagram in Figure 11 -7 . The Verilog description of the inverter is shown below. Example 11-6 CMOS Inverte...

Ngày tải lên: 01/07/2014, 21:20

... coin = 0; 14 .7 Example of Sequential Circuit Synthesis In Section 14.4.2 , An Example of RTL-to-Gates, we synthesized a combinational circuit. Let us now consider an example of sequential circuit ... triggered D flip-flop 14 .7. 6 Design Constraints Timing critical is the only design constraint we used in this design. Typically, design constraints are more elaborate. 14 .7. 7 Log...

Ngày tải lên: 01/07/2014, 21:20