Abstract: This paper presents a design scheme with low power consumption oriented to security domain called Application Specific Instruction-set Processor(ASIP) which also achieves high performance and flexibility. The instruction Read Only Memory(ROM) is divided into two parts, one of which can be power gated in some cases. The clock-gating method is used to cool the registers in the register file unit. The operator latches are added in front of the EXE stage so that the idle function units can avoid unnecessary switches. Experimental results show the scheme reduces the power of the core part of security ASIP and the whole design including storage elements by 30% and 16% on average respectively.

Key words: ncryption algorithm, low-power, Application Specific Instruction-set Processor(ASIP), encryption computing unit

摘要： 提出一种面向安全领域的专用指令集处理器(ASIP)设计方案，ASIP的指令ROM被划分成两部分，在某些指令下可以关闭其中一块以节省功耗，采用门控时钟技术降低寄存器堆中各个寄存器的功耗，对当前指令周期中EXE级内部空闲功能单元的输入操作数进行锁存，避免该功能单元的信号翻转，从而降低其动态功耗。实验结果表明，该方案能够使ASIP核心功能单元的功耗降低30%，系统整体功耗降低16%。

关键词: 加密算法, 低功耗, 专用指令集处理器, 加密运算单元

CLC Number: 

• N945