Transcript An Overview

An Overview
CS341 Digital Logic and
Computer Organization
F2003
What is this?
PowerPC G5 Processor
G5 Chip Features (taken from an
adversement in Newsweek
• World’s first 64-bit processor for PCs.
• 12-inch Silicon wafer VLSI technology (500 processing
steps)
• 58 million transistors
• Conducting path less than 1/800th the width of human
hair
• 1 GHz bus
• Breaks the 4 GB memory space (4 billion times)
• Supports 200 in-flight instructions at a time
Topics
• Definitions
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digital
digital system
logic design
computer
computer design
• Digital vs. analog computers
• Data/information representation
– numeric: binary and other number systems
– non-numeric: ASCII, EBCIDIC, and Unicode
• Functional units of a generic computer
Description of a VLSI digital system
• Description of a digital system
– Behavioral domain
– Structural domain
– Physical domain
• Levels of abstractions in each of the domains
– Architectural level (CS441)
– RTL, logic level (CS341)
– Circuit level
• IEEE standardized HDL (Hardware Description
Language)
– VHDL (1987, 1993): VHSIC (Very High Speed Integrated Circuit)
HDL
– Verilog (1996)
Design parameters
• Performance: speed, power, function,
flexibility
• Size (cost) of the die
• Time to design (impact cost)
• Time to market (impact profit)
• Ease of test
Structured design strategies
• Top-down divide-and-conque: divide a
module into sub-modules.
• Bottom-up: assemble primitive functional
units (sub-modules or modules) to perform
more complex functions
• Use of CAD/CAE tools in all stages of
design and simulation.
Voltage ranges for binary signals
Major advantages of digital over
analog systems
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Cost (VLSI technology)
Flexibility (programable)
Dependability and durability
Security (coded)
Major hardware components or
function units of a digital computer
Powers of two
Numbers with different bases
Binary-coded decimals
ASCII continued
First 256 codes for 16-bit Unicode