A Low-Power Microcontroller with on-Chip Self-Tuning Digital Clock-Generator for Variable-Load Applications
Oct. 10, 1999 to Oct. 13, 1999
Mauro Olivieri , University of Rome La Sapienza
Alessandro Trifiletti , University of Rome La Sapienza
Alessandro de Gloria , University of Genoa
Clock disabling for power management has been implemented in some micro-controllers, but the wake-up time of Xtal/PLL-based systems is incompatible with fast interrupt response. On the other hand, hardwired on-chip clocking has been used for dedicated circuits. We illustrate the design issues of a general-purpose micro-controller core with a programmable on-chip fully-digital clock generator. The CPU is compatible with the PIC16C57 instruction set and supports software-controlled clocking modes - ranging from 44 MHz up to 124 MHz; on-line self-tuning of the maximum full-speed frequency in case of peak-performance requirements; ultra-fast wake-up even with totally disabled clock generator - namely 8.6 ns.
Mauro Olivieri, Alessandro Trifiletti, Alessandro de Gloria, "A Low-Power Microcontroller with on-Chip Self-Tuning Digital Clock-Generator for Variable-Load Applications", ICCD, 1999, 2012 IEEE 30th International Conference on Computer Design (ICCD), 2012 IEEE 30th International Conference on Computer Design (ICCD) 1999, pp. 476, doi:10.1109/ICCD.1999.808583