Serial Low-Power Bus Coding Schemes for VLSI

• Main Authors: Wey-Bang Wu, 吳蔚邦
• Other Authors: Chih-Hung Kuo
• Format: Others
• Language: en_US
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/81267077501598536227

碩士 === 國立成功大學 === 電機工程學系碩博士班 === 94 === In this thesis, we present serial coding methods to reduce the switching activity on the bus, and implement the error control codes to reduce the power consumption. The basic principle of our proposed coding method is to append extra information bits to the back of the original data packet without appending redundant bitlines on the bus. The first proposed coding method is serial line encoding (SLE), and the second proposed coding method is serial bus-invert coding (SBI). We also propose the generalized serial line encoding (GSLE), and analyze its performance. The total transition savings of SBI4 coding can save about 16% over uncoded bus, and the total transition savings of SLE(5,4) code can save about 12%. Then we apply the proposed schemes to a simple AMBA-based platform. Experimental results show that the proposed low-power coding schemes can reduce power consumption about 5.4% ~ 19%, compared to that of the uncoded words, without adding redundant bitlines on the bus. The accomplished error control codes can save power consumption about 17% ~ 43% on the bus. According to experimental results, the transition savings of the proposed low-power codes remain the same even if the bus width is increasing without limit.