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An Energy Efficient Processor Applicable to Continuous SPO2 Monitoring

This paper proposes an energy efficient processor, which enables portable health monitoring devices to continuously work with limited battery capacity. The proposed processor realizes a single stage operation by asynchronously reading data from the data memory. Experimental results on a FPGA board show that estimated energy consumption to complete the Dhrystone benchmark test suite by the proposed processor is 6.4% compared to a five stage pipelined MicroBlaze processor. Implementation of the proposed processor to human tissue oxygen saturation measurement demonstrates that the system substantially lasts over two days with a AA NiMH rechargeable battery.