Sequential Verulog Topics part 5 ppt

... 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 ... =...

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

... destination, as illustrated in Figure 10 -5 . Figure 10 -5. Full Connection Delays for module M were described in Example 10-3 , using a parallel connection. Example 10 -5 shows how delays are specified ... a 32-bit vector and out[ 15: 0] is a 16-bit vector //Delay of 9 between each bit of a and every bit of out specify ( a *> out) = 9; // you would need 32 X 16 = 352 parallel...

Ngày tải lên: 01/07/2014, 21:20

... [1] Array of instances can be defined for switches. Array of instances is described in Section 5. 1.3 , Array of Instances. 11.1.1 MOS Switches Two types of MOS switches can be defined with ... after the keyword for the switch. Delay specification is similar to that discussed in Section 5. 2.1 , Rise, Fall, and Turn-off Delays. Zero, one, two, or three delays can be specified for swi...

Ngày tải lên: 01/07/2014, 21:20

... pp. 30- 35, ISSN 2071-8004 Hale G.M. and Querry M.R. (1973). Optical constants of water in the 200-nm to 200-μm wavelength region. Applied Optics, Vol. 12, pp. 55 5 56 3, ISSN 0003-69 35 Leighton ... Hyperpigmentation after Carbon Dioxide Laser Resurfacing. Dermatologic Surgery, Vol. 35, No. 3, (March 2009), pp. 53 5 -53 7, ISSN 152 4-47 25 Sandler B.I., Sulyandziga L.N., Chudnovskii...

Ngày tải lên: 19/06/2014, 10:20

... top.my_mux.sbar is 1 5 New value of net top.my_mux.y1 is 1 5 New value of net top.my_mux.sbar is 0 5 New value of net top.my_mux.y1 is 0 10 New value of net top.my_mux.sbar is X 15 New value of ... I0=1'b0; I1=1'b1; S = 1'b0; #5 I0=1'b1; I1=1'b1; S = 1'b1; #5 I0=1'b0; I1=1'b1; S = 1'bx; #5 I0=1'b1; I1=1'b1; S = 1&apos...

Ngày tải lên: 01/07/2014, 21:20

... the timing constraint from 20 ns to 15 ns and resynthesize the design to get the new gate-level netlist that is optimized to achieve a cycle time of 15 ns. • Logic synthesis tools optimize ... ns. If the designer wanted to find out whether the circuit could be optimized to run faster at 15 ns, the entire block had to be redesigned. Thus, redesign was needed to verify what- if scenario...

Ngày tải lên: 01/07/2014, 21:20

... 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

... all possible combinations A = 1'b0; B = 1'b0; #5 A = 1'b0; B = 1'b1; #5 A = 1'b1; B = 1'b0; #5 A = 1'b1; B = 1'b1; end //check results initial ... 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 de...

Ngày tải lên: 01/07/2014, 21:20

... s 15; end else if (fsm_coin == 2'b01) begin fsm_newspaper = 1'b0; fsm_NEXT_STATE = s10; end else • states: 4 states—s0 = 0 cents; s5 = 5 cents; s10 = 10 cents; s 15 = 15 ... fsm_newspaper = 1'b0; fsm_NEXT_STATE = s5; end else begin fsm_newspaper = 1'b0; fsm_NEXT_STATE = s0; end end s5: //state = s5 begin if (fsm_coin == 2'b10...

Ngày tải lên: 01/07/2014, 21:20