Scale4Edge ecosystem demonstrator chip for an industrial audio event detection application developed as part of the Scale4Edge project. The chip is manufactured in Globalfoundries’ 22FDX technology and contains a RISC-V CPU with custom Instruction-Set-Architecture Extensions (ISAX) for fast AI and DSP processing, a low power neural network accelerator, and a scalable PLL to fulfill real-time processing requirements. The chip has a total area of 2500 µm × 1350 µm and contains 107 I/O-Pins, including supply voltages (1.8 V I/O, 0.9 V core). The PLL dimension was 300 µm × 200 µm. The clock source can be varied through an on-board oscillator (20–200 MHz) or through the on-chip PLL (160–1180 MHz). The digital design was optimized for a worst-case frequency range of 20–700 MHz to apply different clock frequencies, which can be dynamically scaled either via software or through configuration pins. Experimental results have shown, that we can safely overclock the chip up to 1 GHz. During idle times, the TGC-C and UltraTrail are aggressively clock-gated. In total, the system features 384 KiB of SRAM for the SoC and 136 KiB of SRAM for UltraTrail.

Reference:

P. P. Bernardo, M. Iftekhar, B. Sadiye, W. Mueller et al., "A Scalable RISC-V Hardware Platform for Intelligent Sensor Processing," 2024 Design, Automation & Test in Europe Conference & Exhibition (DATE), Valencia, Spain, 2024, pp. 1-5, doi: 10.23919/DATE58400.2024.10546589.