Smart Phone and Next Generation Mobile Computing

212 Smart Phone and Next-Generation Mobile Computing

management technology continuously samples a processor’s vari-

ous sleep states and adjusts the CPU cycle frequency and operational

voltage in response to the needs of the operating system and appli-

cation software. In addition, LongRun power management does not

require system BIOS, an operating system, device drivers, or exist-

ing applications to use software interfaces in order to take advantage

of them. Crusoe and Efficeon are both x86-compatible processors

that employ a so-called “code morphing” technique to translate

x86 instructions into native instructions of the underlying very

long instruction word (VLIW) engine. In this sense, Crusoe can be

regarded as a virtual CPU engine. Transmeta’s