The document discusses electronic design automation and the concept of VHDL. It provides a brief history of milestones in the integrated circuit industry. It then explains abstraction levels in VLSI design, digital system design principles, and application specific integrated circuits. The document introduces the concept of programmable logic arrays and function implementation using PLA. It defines electronic design automation and hardware description language VHDL. It discusses simulation and synthesis in VHDL along with basics of complex programmable logic devices and field programmable gate arrays.

1. Electronic Design Automation & The Concept behind VHDL Prof. Anish Goel

2. Contents Milestones for IC Industry Abstraction levels of VLSI design Digital System Design Application Specific Integrated Circuits (ASIC’s) Function Implementation using PLA Electronic Design Automation Hardware Description Language (VHDL) Simulation & Synthesis Basics of CPLD and FPGA 2 Electronic Design Automation Anish Goel

3. Milestones for IC Industry 1947: Bardeen, Brattain & Shockly invented the transistor, foundation of the IC industry. 1952: SONY introduced the first transistor-based radio. 1958: Kilby invented integrated circuits (ICs). 1965: Moore’s law. 1968: Noyce and Moore founded Intel. 1970: Intel introduced 1 K DRAM. 3 Electronic Design Automation Anish Goel

4. Milestones for IC Industry 1971: Intel announced 4-bit 4004 microprocessors (2250 transistors). 1976/81: Apple II/IBM PC. 1984: Xilinx invented FPGA’s. 1985: Intel began focusing on microprocessor products. 1987: TSMC was founded (fabless IC design). 1991: ARM introduced its first embeddable RISC IP core (chipless IC design). 4 Electronic Design Automation Anish Goel

5. Milestones for IC Industry (Cont’d) 1996: Samsung introduced IG DRAM. 1998: IBM announces1GHz experimental microprocessor. 1999/earlier: System-on-Chip (SOC) applications. 2002/earlier: System-in-Package (SIP) technology. An Intel P4 processor contains 42 million transistors (1 billion by 2005) Today, we produce ~ 1 billion transistors per person Semiconductor/IC: #1 key field for advancing into 2000 (Business Week, Jan. 1995). 5 Electronic Design Automation Anish Goel

6. From Wafer to Chip 6 Electronic Design Automation Anish Goel

7. Abstraction levels of VLSI design 7 Electronic Design Automation Anish Goel

8. Digital System Design Several conflicting considerations: Design Complexity: large number of devices/transistors Performance: optimization requirements for high performance Time-to-market: about a 15% gain for early birds Cost: die area, packaging, testing, etc. Others: power, signal integrity (noise, etc), testability, reliability, manufacturability, etc. 8 Electronic Design Automation Anish Goel

9. What is an ASIC ? What is an Integrated Circuit (IC)? ICs are basically “chips” Silicon Wafers Transistors, resistors, capacitors fabricated Can be either Digital or Analog Microprocessors, Amplifier, Memory ASICs are Application Specific ICs Designed for a special application ASICs may be customized or mass produced Digital to Audio Converter Mpeg2 Decoder 9 Electronic Design Automation Anish Goel

10. SSI/SPLD Design Style 10 Electronic Design Automation Anish Goel

11. Let’s Start from the Basics… Programmable Logic Arrays (PLA) A PLA is a general circuit that can be programmed to implement any Boolean function. This is based on the fact that a Boolean function can be expressed in a sum of product (SOP) form Example: A 3 input PLA 11 Electronic Design Automation Anish Goel

12. 3 Input PLA… Inputs OR array AND array Outputs Implement f1 = A.B + A.C + B.C And f2 = A. B.C Using the given PLA circuit 12 Electronic Design Automation Anish Goel

13. Function Implementation using PLA.. Inputs OR array AND array Outputs A B C f1 f2 13 Electronic Design Automation Anish Goel

14. Abstraction Abstraction: when looking at a certain level, you don’t need to know all details of the lower levels. Design domains: Behavioral: black box view Structural: interconnection of sub-blocks Physical: layout properties Each design domain has its own hierarchy. 14 Electronic Design Automation Anish Goel

15. Electronic Design Automation (EDA) Electronic Design Automation (EDA): (Short Definition) The use of software to automate electronic (digital and analog) design. Electronic Design Automation (EDA) (Longer Definition) Electronic design in which the design is entered using design capture tools or using a text editor and a hardware description language possibly consisting of “parts” from a vendor's library 15 Electronic Design Automation Anish Goel

16. Hardware Description Language VHDL (VHSIC Hardware Description Language) Widely used in industry. Ada-like syntax. (Ada is a DoD-developed language for large embedded systems.) Developed as part of U.S. Department of Defense (DoD) VHSIC program in 1983 Became IEEE standard 1076 in 1987. Standard updated in 1993. 16 Electronic Design Automation Anish Goel

17. Synthesis Design Target Design Target: The type of device to be manufactured or programmed. Synthesis programs generate output for a particular design target. Design Targets Programmable Logic Array (PLA): Chip that can be programmed (once) to implement a logic function. Usually programmed at the factory. PLAs might be used in prototypes or when only a few parts are needed. Application-Specific Integrated Circuit (ASIC): A fully custom chip. Usually the fastest design target, can have the most components. 17 Electronic Design Automation Anish Goel

18. Overall Concept on VHDL VHDL is a Standard Language Standard in the electronic design community. VHDL will virtually guarantee that you will not have to throw away and re-capture design concepts simply because the design entry method you have chosen is not supported in a newer generation of design tools. Takes advantage of the most up-to-date design tools, and will have access to a knowledge-based of thousands of other engineers, many of who are solving problems similar to your own ( Model availability). Tool interoperability Design Documentation 18 Electronic Design Automation Anish Goel

19. Designing in VHDL 19 Electronic Design Automation Anish Goel

20. How to design a complex chip using VHDL… 20 Complex like: A microcontroller (maybe similar to 8051) Peripheral device (maybe similar to 8255 or 8251) Video encoder MP3 player Decide and design the architecture on paper. Implement the blocks of the chip using VHDL. Interconnect these blocks to form the complete architecture. This is called structural style of modeling. Electronic Design Automation Anish Goel

21. Blocks? Architecture? 21 Electronic Design Automation Anish Goel

22. Simple example. 22 Design and implement a 4:16 decoder using VHDL. VHDL code for 4:16 decoder. library IEEE; use IEEE.STD_LOGIC_1164.ALL; use IEEE.STD_LOGIC_ARITH.ALL; use IEEE.STD_LOGIC_UNSIGNED.ALL; entity decoder4to16 is Port ( D : in std_logic_vector(3 downto 0); E : out std_logic_vector(15 downto 0); F : in std_logic); end decoder4to16; ...... …….. ………. Electronic Design Automation Anish Goel

23. Simulation and Synthesis. 23 Verify the functionality of the designed circuit using software. (Simulation) ModelSim Max Plus –II Implement the functionality into a CPLD and FPGA and use it into your circuit or application. Xilinx ISE Quartus You can even purchase a processor that will be sent to you by email. What ?? E-mail ?? Altera NIOS-2 Electronic Design Automation Anish Goel

24. VHDL for Simulation Purely behavioral Architectural: bus widths, number of processors Off-the-shelf components Test benches 24 Electronic Design Automation Anish Goel

25. VHDL for Synthesis RTL description => Synthesis Compiler => Gates (LSI, TI) Simulate RTL description for functionality Simulate gates for timing and to check synthesis Target a synthesis tool from the start Logic model, used to simulate ASIC in any environment 25 Electronic Design Automation Anish Goel

26. CPLD and FPGA… 26 PLA and PAL’s. PLD’s. SPLD’s. CPLD FPGA. Electronic Design Automation Anish Goel

27. Complex Programmable Logic Device 27 CPLD architecture Small number of large PLDs on a single chip Programmable interconnect between PLDs Electronic Design Automation Anish Goel

28. Field Programmable Gate Array 28 FPGA architecture Much larger number of smaller programmable logic blocks. Embedded in a sea of lots and lots of programmable interconnects. Electronic Design Automation Anish Goel

29. System on chip 29 FPGA technology allows you to embed a processor, ROM, RAM, DSP, and any other block onto a single chip This is replacing a lot of Application Specific Integrated Circuit chips This has major advantages for electronics companies in terms of cost, reliability, reusability of intellectual property, and time to market Electronic Design Automation Anish Goel

30. Thank you !!! But wait… 30 This presentation is open source…. Log on to my website: www.discovermechatronics.blogspot.com You can view/download this presentation. You can brows my projects on this website. Electronic Design Automation Anish Goel