Introduction to CMOS VLSI Design Lecture 22 Case

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Introduction to CMOS VLSI Design Lecture 22: Case Study: Intel Processors Credits: David Harris

Introduction to CMOS VLSI Design Lecture 22: Case Study: Intel Processors Credits: David Harris Harvey Mudd College (Material taken/adapted from Harris’ lecture notes) 22: Processor Case Study 1

Outline q Evolution of Intel Microprocessors – Scaling from 4004 to Pentium 4 –

Outline q Evolution of Intel Microprocessors – Scaling from 4004 to Pentium 4 – Courtesy of Intel Museum 22: Processor Case Study CMOS VLSI Design 2

4004 q First microprocessor (1971) – For Busicom calculator q Characteristics – 10 mm

4004 q First microprocessor (1971) – For Busicom calculator q Characteristics – 10 mm process – 2300 transistors – 400 – 800 k. Hz – 4 -bit word size – 16 -pin DIP package q Masks hand cut from Rubylith – Drawn with color pencils – 1 metal, 1 poly (jumpers) – Diagonal lines (!) 22: Processor Case Study CMOS VLSI Design 3

8008 q 8 -bit follow-on (1972) – Dumb terminals q Characteristics – 10 mm

8008 q 8 -bit follow-on (1972) – Dumb terminals q Characteristics – 10 mm process – 3500 transistors – 500 – 800 k. Hz – 8 -bit word size – 18 -pin DIP package q Note 8 -bit datapaths – Individual transistors visible 22: Processor Case Study CMOS VLSI Design 4

8080 q 16 -bit address bus (1974) – Used in Altair computer • (early

8080 q 16 -bit address bus (1974) – Used in Altair computer • (early hobbyist PC) q Characteristics – 6 mm process – 4500 transistors – 2 MHz – 8 -bit word size – 40 -pin DIP package 22: Processor Case Study CMOS VLSI Design 5

8086 / 8088 q 16 -bit processor (1978 -9) – IBM PC and PC

8086 / 8088 q 16 -bit processor (1978 -9) – IBM PC and PC XT – Revolutionary products – Introduced x 86 ISA q Characteristics – 3 mm process – 29 k transistors – 5 -10 MHz – 16 -bit word size – 40 -pin DIP package q Microcode ROM 22: Processor Case Study CMOS VLSI Design 6

80286 q Virtual memory (1982) – IBM PC AT q Characteristics – 1. 5

80286 q Virtual memory (1982) – IBM PC AT q Characteristics – 1. 5 mm process – 134 k transistors – 6 -12 MHz – 16 -bit word size – 68 -pin PGA q Regular datapaths and ROMs Bitslices clearly visible 22: Processor Case Study CMOS VLSI Design 7

80386 q 32 -bit processor (1985) – Modern x 86 ISA q Characteristics –

80386 q 32 -bit processor (1985) – Modern x 86 ISA q Characteristics – 1. 5 -1 mm process – 275 k transistors – 16 -33 MHz – 32 -bit word size – 100 -pin PGA q 32 -bit datapath, microcode ROM, synthesized control 22: Processor Case Study CMOS VLSI Design 8

80486 q Pipelining (1989) – Floating point unit – 8 KB cache q Characteristics

80486 q Pipelining (1989) – Floating point unit – 8 KB cache q Characteristics – 1 -0. 6 mm process – 1. 2 M transistors – 25 -100 MHz – 32 -bit word size – 168 -pin PGA q Cache, Integer datapath, FPU, microcode, synthesized control 22: Processor Case Study CMOS VLSI Design 9

Pentium q Superscalar (1993) – 2 instructions per cycle – Separate 8 KB I$

Pentium q Superscalar (1993) – 2 instructions per cycle – Separate 8 KB I$ & D$ q Characteristics – 0. 8 -0. 35 mm process – 3. 2 M transistors – 60 -300 MHz – 32 -bit word size – 296 -pin PGA q Caches, datapath, FPU, control 22: Processor Case Study CMOS VLSI Design 10

Pentium Pro / III q Dynamic execution (1995 -9) – 3 micro-ops / cycle

Pentium Pro / III q Dynamic execution (1995 -9) – 3 micro-ops / cycle – Out of order execution – 16 -32 KB I$ & D$ – Multimedia instructions – PIII adds 256+ KB L 2$ q Characteristics – 0. 6 -0. 18 mm process – 5. 5 M-28 M transistors – 166 -1000 MHz – 32 -bit word size – MCM / SECC 22: Processor Case Study CMOS VLSI Design 11

Pentium 4 q Deep pipeline (2001) – Very fast clock – 256 -1024 KB

Pentium 4 q Deep pipeline (2001) – Very fast clock – 256 -1024 KB L 2$ q Characteristics – 180 – 90 nm process – 42 -125 M transistors – 1. 4 -3. 4 GHz – 32 -bit word size – 478 -pin PGA q Units start to become invisible on this scale 22: Processor Case Study CMOS VLSI Design 12

Summary q 104 increase in transistor count, clock frequency over 30 years! 22: Processor

Summary q 104 increase in transistor count, clock frequency over 30 years! 22: Processor Case Study CMOS VLSI Design 13

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