A 0.9 V to 1.95 V dynamic voltage-scalable and frequency-scalable 32 b PowerPC processor
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abstract
A 32 b PowerPC system-on-a-chip supporting dynamic voltage supply and dynamic frequency scaling operates from 366 MHz at 1.8 V and 600 mW down to 150 MHz at 1.0 V and 53 mW in a 0.18 m CMOS process. Maximum supply change without PLL relock is 10 mV/s. Processor state save/restore enables a deep-sleep state.