US 7,581,120 B1
System and method for providing multi-point calibration of an adaptive voltage scaling system
Mark Hartman, Santa Clara, Calif. (US); James T. Doyle, Nederland, Colo. (US); Dragan Maksimovic, Boulder, Colo. (US); Pasi Salmi, Kemi (Finland); Juha Pennanen, Oulu (Finland); and Sandeep Dhar, Boulder, Colo. (US)
Assigned to National Semiconductor Corporation, Santa Clara, Calif. (US)
Filed on May 23, 2005, as Appl. No. 11/134,997.
Int. Cl. G06F 1/26 (2006.01)
U.S. Cl. 713—300  [327/158; 713/320] 21 Claims
OG exemplary drawing
 
1. An apparatus for providing multi-point calibration of an adaptive voltage scaling system, said apparatus comprising:
a memory unit that comprises a multi-point calibration table, the multi-point calibration table comprising a plurality of reference calibration codes in which each of said plurality of reference calibration codes is associated with one of a plurality of operating frequencies of said adaptive voltage scaling system; and
an advanced power controller associated with said multi-point calibration table, wherein said advanced power controller is capable of receiving a signal that requests one of said plurality of operating frequencies, and in response to receiving said signal, selects a reference calibration code in said multi-point calibration table that corresponds to said requested operating frequency.