A 709.3 TOPS/W Event-Driven Smart Vision SoC with High-Linearity and Reconfigurable MRAM PIM.

This paper presents a high energy-efficiency system-on-chip (SoC) for smart vision applications. A novel reconfigurable and high-linearity MRAM PIM is proposed and achieve high-accuracy event detection (ED) and high-energy-efficiency inference in the event-driven system. The 28nm SoC obtains an average core power consumption of 7.3mW, with an average power reduction of 30.9% at all event densities. The MRAM PIM achieves the peak energy efficiency of 709.3 TOPS/W (1bI-1bW-3bO) at 200MHz and inference accuracy of 91.90%/67.61% (CIFAR-10/100) with ResNet-20.