Bus-invert coding for low-power I/O
IEEE Transactions on Very Large Scale Integration (VLSI) Systems
System-level power optimization of special purpose applications: the beach solution
ISLPED '97 Proceedings of the 1997 international symposium on Low power electronics and design
Exploiting the locality of memory references to reduce the address bus energy
ISLPED '97 Proceedings of the 1997 international symposium on Low power electronics and design
Partial bus-invert coding for power optimization of system level bus
ISLPED '98 Proceedings of the 1998 international symposium on Low power electronics and design
Power-optimal encoding for DRAM address bus (poster session)
ISLPED '00 Proceedings of the 2000 international symposium on Low power electronics and design
Saving Power in the Control Path of Embedded Processors
IEEE Design & Test
SYCLOP: Synthesis of CMOS Logic for Low Power Applications
ICCD '92 Proceedings of the 1991 IEEE International Conference on Computer Design on VLSI in Computer & Processors
Low-power state assignment targeting two- and multilevel logic implementations
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
On-Chip Communication Architectures: System on Chip Interconnect
On-Chip Communication Architectures: System on Chip Interconnect
Dynamic refresh-rate scaling via frame buffer monitoring for power-aware LCD management
Software—Practice & Experience
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Microprocessors with built-in Liquid Crystal Device (LCD) controllers and equipped with Flash memory are common in mobile computing applications. In the first part of the paper, a software-only encoding technique is proposed to reduce the power consumption of the processor-memory bus when displaying an image on the LCD. Based on the translation mechanism of the LCD controller, our approach is to start with the palette as a coding table for the pixel buffer and then reassign the codes according to the image characteristics. Experimental results prove the efficacy of this approach; power reduction reaches 29% for text-based and 17% for graphics-based images. In the second part of the paper, another software-only encoding technique is presented to reduce the transitions on the processor-CompactFlash bus. The device driver in Linux operating system is modified to perform Bus-Invert encoding when the data is read from or written to a Compact Flash file system. With minimal software overhead, the transitions on the bus are reduced by up to 25%.