A Seminar on Crusoe microprocessor

2. WHAT IS A MICROPROCESSOR?

3. MANUFACTURER:
1995- JAN 2009
AQUIRED BY
2004-AUG 2009
(2001)

4. Features of a Mobile Computing
Processor
 Power efficient
 Stays Cool under load
 Does not compromise with processing speed

5. OVERVIEW OF THE CRUSOE
The HYBRID MICROPROCESSOR

6. Crusoe Specifications
SERIES TRANSMETA CRUSOE
CODE TM-5800(128-bit)
CLOCK RATE 1000MHz
L1 cache 128Kb
L2 cache 512Kb
No of cores/threads 1
Transistor count 36.8 Million
Manufacturing Technology 130 nm
Die size 55 mm²
Power consumption 7 Watt

7. Technology Behind The CRUSOE
 “AMOEBA” architecture.
 VLIW (Very Long Instruction Word)
 Code Morphing Software*
 Long run :Power Management*
*(Transmeta’s Patented technologies)

8. software
Protected
mode
arithmatic
prefixes
excution

9. CODE MORPHING MECHANISM
VLIW Processor Core
Code Morphing Software
x86 OS/BIOS
x86 Applications
A dynamic translation System

10. CONVETIONAL CPU
• Use hardware to create and dispatch micro
ops that can be executed in parallel leading to
making them less power efficient
X86 INSTRUCTION

11. ARCHITECTURE OF CRUSOE
L1 INSTRUCTION
CACHE
64 Kb
L1 DATA CACHE
64Kb
BUS
INTERFACE
DDR SDRAM
CONTROLLER
UNIFIED TLB
256 ENTRIES
SERIAL ROM
INTERFACE
CPU CORE
INTEGER UNIT
FLOATING POINT UNIT
MMU
MULTIMEDIA UNIT
L2 Web CACHE
256 Kb
PCI CONTROLLER
SDR SDRAM
CONTROLLER

12. VLIW Technology
 The compiler determines which instruction can be
run concurrently.
 The compiler generates grouped independent
primitive instruction executable in parallel.
CRUSOE CORE

13. LONGRUN:POWER MANAGEMENT
• Typical Approach 1: Switch off processor quickly to
save power (Can give glitches)
• Typical Approach 2: Change clock rate by
suspending processor and restarting
• Crusoe 1: Adjust clock rate dynamically, without
suspension
• Crusoe 2: Adjust voltage level
• Result: Cubic power reduction, up to 30%.

14. BOTH PROCESSORS PLAYING A DVD
PIII 105.5 C
PIII VS CRUSE HEAT GENERATION
CRUSOE 48.2 C

15. A revolutionary innovation
dies…
• Optimization techniques could be tailored to create
different target architectures.
• Workstation/Server chips were hinted at in the
documentation.
• A whole new family of mobile phone processors
unlike the odds of Nvidia’s Tegra™ and Qualcomm’s
Snapdragon™ series