Title :
PowerTune: advanced frequency and power scaling on 64b PowerPC microprocessor
Author :
Lichtenau, C. ; Pfluger, T. ; Geissler, S. ; Hilgendorf, R. ; Heaslip, J. ; Weiss, U. ; Sandon, P. ; Rohrer, N. ; Cohen, Emmanuel ; Canada, M.
Author_Institution :
IBM, Boeblingen, Germany
Abstract :
PowerTune is a power-management technique for a multi-gigahertz superscalar 64b PowerPC® processor in a 90nm technology. This paper discusses the challenges and implementation of a dynamically controlled clock frequency with noise suppression as well as a synchronization circuit for a multi-processor system.
Keywords :
clocks; digital phase locked loops; microprocessor chips; synchronisation; PowerPC microprocessor; PowerTune; divided clocks; dynamically controlled clock frequency; frequency scaling; multi-gigahertz superscalar processor; multiprocessor system; noise suppression; power scaling; power-management technique; single PLL driving divider circuitry; synchronization circuit; Clocks; Counting circuits; Delay; Energy management; Frequency conversion; Logic; Microprocessors; Phase locked loops; Switches; Voltage;
Conference_Titel :
Solid-State Circuits Conference, 2004. Digest of Technical Papers. ISSCC. 2004 IEEE International
Print_ISBN :
0-7803-8267-6
DOI :
10.1109/ISSCC.2004.1332741