从通道互连结构角度考虑,该文提出一种降低FPGA中开关矩阵漏电流的方法。根据漏电流与电路输入、输出状态有关的结论,利用连线开关盒(SWB)对信号的传输特性,将FPGA中开关矩阵的漏电优化等效在小规模的矩阵单元中实现。因为能够在有限的输出状态组合中搜寻最小漏电状态,相比仅通过电平恢复器确定SWB输出状态的方法,该算法能有效地降低漏电流,并且兼容电路级的漏电流优化方法。
From the perspective of routing architecture, a leakage reduction method of switch matrixes in FPGA is proposed. Based on the conclusion of state-dependent leakage, the lowest leakage current of switch matrixes in FPGA is equivalently computed in a small size of matrix cell using the transition property of SWitch Box (SWB). Because the presented algorithm could research the lowest leakage state in finite SWB output state combinations, rather than confirming SWB output state by level-restoring circuit, the algorithm is used for efficient reduction of leakage in switch matrixes and is compatible with the optimization of leakage at the circuit-level.