PPT-Lecture 3 : Combinational Logic in SystemVerilog

UCSD ECE 111 Prof Farinaz Koushanfar Fall 2017 Some slides are courtesy of Prof Lin Register Transfer Level Design Description Combinational Logic Combinational . 1 Combinational Logic Circuit 2 Sequential Logic Circuit Definition 1 Combinational Logic Circuit The circuit in which outputs depends on on ly present value of inputs So it is possible to describe each output as function of inputs by using Boolea Discussion #22 – Combinational Logic. 1. Remember and be Thankful. 2 Nephi 1:9, 20. :. 9 Wherefore, I, Lehi, have obtained a promise, that. . inasmuch as those whom the Lord God shall bring out of the land of Jerusalem shall keep his commandments, they shall prosper upon the face of this land; and they shall be kept from all other nations, that they may possess this land unto themselves. And if it so be that they shall keep his commandments they shall be blessed upon the face of this land, and there shall be none to molest them, nor to take away the land of their inheritance; and they shall dwell safely forever. . Last Lecture. module ex2(input . logic . a, b, c,. . output . logic . f);. logic . t; . // internal signal. always_comb. begin. . t = a & b;. . f = t | c;. end. endmodule. If a signal is never assigned to, ModelSim will assume that has an “xxx…xxx” value.. This means if you do something like. if (hash != 160’d0). it will return “false” even if “hash” is undefined. It sort of treats x’s as “wildcards”.. The combinational logic of an arbitrary Boolean network can be factored [4] and transformed into an AIG using DeMorgan Chap 9. C-H . 2. Complex Programming Logic Devices. X. ilinx. XCR3064XL CPLD. Function block (16 . macrocells. )= PLA. Macrocell. = a flip flop multiplexers. IA routes signals . Input of function block. Montek Singh. Aug 27, 2014. 2. Today. Digital Circuits (review). Basics . of Boolean Algebra (review). Identities and Simplification. Basics of Logic Implementation. Minterms. and . maxterms. Going from truth table to logic implementation. 1. Date. Day. Class. No.. Title. Chapters. HW. Due date. Lab. Due date. Exam. 17 . Nov. Mon. 22. Combinational Logic. 13.3 – 13.5. LAB 10. 18 . Nov. Tue.  . 19 . Nov. Wed. 23. Sequential Logic. 14.1. CK Cheng. CSE Dept.. UC San Diego. 1. Part III. Standard Modules. Interconnect Modules: . 1. Decoder, 2. Encoder. 3. Multiplexer, 4. Demultiplexer. 2. Multiplexer. Definition. Logic Diagram. Application. Decoders. Introduction. A . decoder is a . multiple-input, multiple-output logic circ. uit that converts . coded . inputs . into coded outputs, where the input and output codes are different. . The input . © . 2014 . Project Lead The Way, Inc.. Digital Electronics. Combinational Logic. Design Process. Version #1. Word Problem. Write Logic Expression. Boolean Simplification. AOI Logic. Implementation. 4. Montek Singh. Sep . {25, 27}. , 2017. Today’s Topics. Logic Minimization. Karnaugh. Maps. Combinational Building Blocks. Multiplexers. Decoders. Encoders. Delays and Timing. 2. Karnaugh. Maps (K-maps). 4. Montek Singh. Sep 19-21, . 2016. Today’s Topics. Logic Minimization. Karnaugh. Maps. Combinational Building Blocks. Multiplexers. Decoders. Encoders. Delays and Timing. 2. Karnaugh. Maps (K-maps). SystemVerilog is a superset of Verilog. The subset we use is 99% Verilog + a few new constructs. Familiarity with Verilog (or even VHDL) helps a lot. SystemVerilog resources on “Assignments” page.