Tài liệu Hierarchical Modeling Concepts part 2 ppt

... reset is asserted from 0 to 20 and from 20 0 to 22 0. initial begin reset = 1'b1; #15 reset = 1'b0; #180 reset = 1'b1; #10 reset = 1'b0; #20 $finish; //terminate the ... T_FF tff2(q [2] ,q[1], reset); T_FF tff3(q[3],q [2] , reset); endmodule In the above module, four instances of the module T_FF (T-flipflop) are used. Therefore, we must now define (Ex...

Ngày tải lên: 24/12/2013, 11:17

... cells. To illustrate these hierarchical modeling concepts, let us consider the design of a negative edge-triggered 4-bit ripple carry counter described in Section 2. 2 , 4-bit Ripple Carry Counter. ... higher-level blocks until we build the top-level block in the design. Figure 2- 2 shows the bottom-up design process. Figure 2- 2. Bottom-up Design Methodology Typically, a com...

Ngày tải lên: 24/12/2013, 11:17

... //Example 2 module top; bus_master b1(); //instantiate module unconditionally 'ifdef ADD_B2 bus_master b2(); //b2 is instantiated conditionally if text macro //ADD_B2 is defined ... specify that the particular portion of the code be compiled only if a certain flag is set. This is called conditional compilation. A designer might also want to execute certain parts of the Veri...

Ngày tải lên: 21/01/2014, 17:20

... Lesson 19: Negotiating (part 2) Bài 19: Thương lượng (phần 2) Trần Hạnh và toàn Ban Tiếng Việt Đài Úc Châu xin thân chào bạn. Mời bạn theo ... nhìều mà còn nói được nhiều câu tương tự đến như thế. Lesson 19: Negotiating (part 2) Bài 19: Thương lượng (phần 2) Trong bài 19 này, bạn sẽ học hỏi nghệ thuật ăn nói khi cần phải mặc cả hay ... Then we can agree, Agree to pay. TH m...

Ngày tải lên: 11/12/2013, 16:16

Ngày tải lên: 13/12/2013, 20:15

... and then drops as you come to the end of the whole number. 5849 3714 *6 12 9983 4 721 *0 122 3 46 027 8 *33 76 49 52 98 *04 12 6136 12 Speakers normally use an upward intonation if they have more to add ... your voice should rise and fall. Read the extracts out loud to your partner, as if you were giving a talk or a lecture, paying particular attention to the intonation patterns needed to...

Ngày tải lên: 13/12/2013, 21:15

... Example 4 -2 . Example 4 -2 List of Ports module fulladd4(sum, c_out, a, b, c_in); //Module with a list of ports module Top; // No list of ports, top-level module in simulation 4 .2. 2 Port Declaration ... environment as long as the interface is not modified. Ports are also referred to as terminals. 4 .2. 1 List of Ports A module definition contains an optional list of ports. If the...

Ngày tải lên: 15/12/2013, 03:15

... | n_input_gatetype [drive_strength] [delay2] n_input_gate_instance { , n_input_gate_instance } ; | n_output_gatetype [drive_strength] [delay2] n_output_gate_instance { , n_output_gate_instance ... [delay2] n_output_gate_instance { , n_output_gate_instance } ; | pass_en_switchtype [delay2] pass_enable_switch_instance { , pass_enable_switch_instance } ; | pass_switchtype pas...

Ngày tải lên: 15/12/2013, 03:15

... Team LiB ] 10 .2 Path Delay Modeling In this section, we discuss various aspects of path delay modeling. In this section, the terms pin and port are used interchangeably. 10 .2. 1 Specify Blocks ... //a[31:0] is 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 = 3 5...

Ngày tải lên: 15/12/2013, 03:15

Ngày tải lên: 23/12/2013, 12:16