Fig. 11.

Power consumption comparison for the two hardware accelerators. (Left) SBP feature extraction with CAR from 93 channels at 2kSps. M0 controls the three SPI blocks and calculates referenced SBP with a 31.5 MHz clock at 1.35 V, while the SBPU requires a 2.9 MHz clock at 0.63 V. (Right) Continuous SSKF inference from 93 channels of SBP data every 50 ms. M0 calculates SSKF updates with a 240 kHz clock at 0.63 V or a 484 kHz clock at 0.63 V for 1D or 2D, respectively. MAU requires a 67.8 kHz clock at 0.63 V.