Mobile Processors Intel Strong Arm Transmeta Crusoe Presentation

Mobile Processors Intel Strong. Arm & Transmeta Crusoe Presentation for CPS 210, Spring '01 Jaidev Patwardhan & Vijay Abhijit Jan 18 th, 2001

Outline • History • Intel Strong. Arm • • Features Architecture Transmeta Crusoe • • • Features Architecture • Comparison • Conclusions • Future

History Started off with Intel's SL technology (1989) • • Allowed embedded code within CPU to slow down, suspend or shut down • Allowed shut downs during only certain periods of inactivity Advanced Power Management (1991) • • Intel and Microsoft • Integrate OS into power management loop

History (contd) Voltage Reduction Technology (1995) • • • Operated at lower voltage than motherboard First implementation on a 90 MHz Pentium processor Advanced Configuration and Power Interface (1997) • • • Intel, Toshiba and Microsoft Enables demand-based power consumption 0. 18 & 0. 25 Micron Technology • • • Processors interface to other components at 2. 5 volts Themselves run at 1. 8 V

Intel Strong. Arm Processor Features • • High performance, Low-Power • System-On-A-Chip • RISC Architecture.

Strong. Arm Architecture • Processing Core -Intel SA-1 core • 16 -Kbyte instruction and 8 -Kbyte data cache • Memory and PCMCIA Control Module • System Control Module - 28 GP I/O ports, RTC, timers, power management controller, interrupt controller, and on-chip oscillators. • Peripheral Control Module - Six channel DMAC, LCD controller, SDLC controller, UART, Ir. DA serial port, Sync. serial port, USB

Transmeta Crusoe Features • • Transmeta's premier product • High Performance (Speeds upto 700 MHz) • Compatible with x 86 applications • Low power consumption

Crusoe Architecture VLIW engine • • • Two integer Units Floating point Unit One Memory Unit Branch Unit Crusoe processor long instruction word "Molecule" • • 64 bits /128 bits long Four RISC like instructions - "Atoms" Atoms within molecule executed in parallel

Strong. Arm vs Crusoe Strongarm • Crusoe • • 100 MHz to 233 Mhz • • Compatibility problems • • Less flexible power management • • Higher average power consumption • • Targeted at PC world • 333 MHz to 700 Mhz Code morphing eliminates problems Flexible frequency scaling Low average power consumption Targeted at Internet devices

Conclusion & Future ü New technology (Code Morphing) ü Tending towards very low power consumption ü Advanced power management features incorporated into modern processors ü New low power Pentium III processor ü True "Pocket" PC ü Peak power < 1 W ? ?