Kablosuz mikrosistemler için dinamik sızıntı bastırma kullanan ultra düşük güçlü RISC-V mikroişlemci sistem tasarımı

Monitoring pulmonary arterial pressure is crucial for the early detection of cardiovascular problems. A specialized microprocessor is viable since it enables flexibility and power efficiency. Therefore, it is desirable to have a processor implanted in the body, powered by a battery or energy harvesting system. Here, an ultra-low-power RISC-V microprocessor design with a standby power of tens of nanowatts is proposed. It utilizes a "Dynamic Leakage Suppression technique," dramatically reducing static power. The processor also has its on-chip clock generator and power-on-reset to operate without additional ICs. It has only two off-chip interfaces: a UART receiver to program the processor and an SPI interface to communicate with the off-chip pressure sensor to measure the pulmonary arterial pressure. Ultra-low leakage I/O drivers are also employed in the design to drive the sensor. The processor achieves noticeably higher energy efficiency for workloads with long standby times than those with conventional methods.