Microwind

Lecture 5 Mi L t 5: Microwind/DCSH i d/DCSH
CSCI 5330 Digital CMOS VLSI Design g g
Instructor: Saraju P. Mohanty, Ph. D.
NOTE: The figures, text etc included in slides are borrowed from various books websites authors pages and other books, websites, pages, sources for academic purpose only. The instructor does not claim any originality. y g y
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LectureOutline
• Microwind Tool • DCSH Tool • Silicon Tool

Source: 1. http://www.microwind.org 2. Microwind Based Design (http://vsp2.ecs.umass.edu/vspg/658/ co d ased es g ( p // sp ecs u ass edu/ spg/658/ TA_Tools/microwind/Microwind.html)

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Microwind and DSCH
• Microwind is a tool for designing and simulating circuits at layout level The tool featuresfull editing facilities level. (copy, cut, past, duplicate, move), various views (MOS characteristics, 2D cross section, 3D process viewer), and an analog simulator. • DSCH is a software for logic design. Based on primitives, a hierarchical circuit can be built and simulated. It also includes delay and power consumption evaluation. • Sili Silicon i f 3D di l of th atomic structure of silicon, isfor display f the t i t t f ili with emphasis on the silicon lattice, the dopants, and the silicon dioxide dioxide.

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Microwind and DSCH …
• Download the followings http://www.microwind.org/ http://www microwind org/ –Microwind3 –DSCH3 DSCH3
– User Manual: http://intrage.insatoulouse.fr/ etienne/microwind/manual_lite.pdf toulousefr/~etienne/microwind/manual lite pdf

from

• Installation and Use:
– Unzip the files above to be able to work with Microwind. – Read the reference manual for the software. – Double click on Microwind3.exe to start the layout editor or on Dsch3.exe to start the schematic editor.
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Tools from Microwind
http://www.microwind.org/ • • • • • • • • Microwind DSCH Microwind3Editor Microwind 2D viewer Microwind 3D viewer Microwind analog simulator Mi i d l i l t Microwind tutorial on MOS devices View of Silicon Atoms
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Microwind and DSCH : NOR Example
• We will learn both the design flow and the CAD tools. tools • The specifications we are going to see may be different for different foundry and technology. • Design Example(3 Levels) : NOR Gate
– Logic Design – Circuit Design – Layout Design
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Microwind / DSCH NOR Example: Logic
• Open the Schematic Editor i Edi in Mi Microwind i d (DSCH3). Click on the transistor symbol in the Symbol Library on the right. g • Instantiate NMOS or PMOS transistors from the symbol library and place them in the editor window. window

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Microwind / DSCH NOR Example: Logic
• Instantiate 2 NMOS and 2 PMOS transistors transistors. • Connect the drains and sources of transistors transistors.

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Microwind / DSCH NOR Example: Logic
• Connect Vdd and GND to the schematic schematic. • Connect input button and output LED. p

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Microwind / DSCH NOR Example: Logic
• You now have NOR schematic ready. • Use your logic simulator to verify the functionality of your schematic. h ti • The next step is to simulate the circuit and check for functionality. • Click on, Simulate -> Start simulation. simulation • This brings up a Simulation Control Window. • Click on the input buttons to set them to 1 or 0. Redcolor in a switch indicates a '1'. 1
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Microwind / DSCH NOR Example: Logic
• Inputs: 0 0 • Inputs: 0 1

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Microwind / DSCH NOR Example: Logic
• Inputs: 1 0 • Inputs: 1 1

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Microwind / DSCH NOR Example: Logic
• The simulation output can be observed as a waveform...