PPT-Combinational Circuits in Bluespec

Arvind Computer Science amp Artificial Intelligence Lab Massachusetts Institute of Technology February 13 2013 httpcsgcsailmitedu6375 L03 1 Combinational circuits are acyclic interconnections of gates. The behavior of a combinational circuit is memorylessthatisgivenastimulustotheinputofacom binational circuit a response appears at the output after some propagation delay but the response is not stored or fedbackSimplyputtheoutputdependssolelyonitsm 1111 Origins of StuckOrigins of StuckOrigins of StuckOrigins of Stuck--FaultsFaultsFaults Functional vs. Structural Functional vs. Structural Functional vs. Structural Functional vs. Structural Carry Boolean Algebra and Reduction Techniques. 1. 5-9 . Karnaugh. Mapping. Used to minimize the number of gates. Reduce circuit cost. Reduce physical size. Reduce gate failures. Requires SOP form. Karnaugh. Boolean Algebra and Reduction Techniques. 1. Figure 5.1 . Combinational logic requirements for an automobile warning buzzer.. Combinational logic uses two or more logic gates to perform a more useful, complex function.. Up to now we have discussed . combinational. circuits.. In many cases, one can reduce the complexity of the hardware by using . sequential. circuits.. Sequential circuits allow for . more . flexible and more sophisticated circuit realizations with richer . Arvind . Computer Science & Artificial Intelligence Lab. Massachusetts Institute of Technology. February 22, 2012. L05-. 1. http://csg.csail.mit.edu/6.S078. Combinational IFFT:. Suppose we want to reduce the area of the circuit. Arvind . Computer Science & Artificial Intelligence Lab. Massachusetts Institute of Technology. February 9, 2011. L03-. 1. http://csg.csail.mit.edu/6.375. Bluespec: Two-Level Compilation. Object code. Latches, Flip-Flops and Decoders. Sequential Circuit. What does this do?. The OUTPUT of a sequential circuit is determined by the current output values from a previous operation.. . In other words the output is a part of the input. . 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. module . halfadder. (s, . cout. , a, b);. input a, b;. output s, . cout. ;.  . . xor. g1(s, a, b);. and g2(. cout. , a, b);.  . endmodule. module . fulladder. (s, c, x, y, z);. input x, y, z;. © . 2014 . Project Lead The Way, Inc.. Digital Electronics. Combinational Logic. Design Process. Version #1. Word Problem. Write Logic Expression. Boolean Simplification. AOI Logic. Implementation.