The IIS Chip Gallery

GAP8 (2017)

by

Eric Flamand, Davide Rossi, Francesco Conti, Igor Loi, Antonio Pullini, Florent Rotenberg

Main Details

Application	Pulp
Technology	55
Manufacturer	TSMC
Type	Industrial
Package	QFN88
Dimensions	3200μm x 3200μm
Gates	2 MGE
Voltage	0.8-1.2 V
Power	75 mW @ 1.2 V, 250 MHz
Clock	250 MHz

Description

GAP8 is a commercial IoT processor designed by Greenwaves Technologies, based on the open source PULP platform. It is quite similar in its design to Mr. Wolf with the following differences

• GAP8 is an industrial design and is available as a product.
• GAP8 is in TSMC55, Mr.Wolf is TSMC40.
• In GAP8 the processor core outside the cluster is a RI5CY, in Mr. Wolf it is a Zeroriscy.
• GAP8 does not FP support
• There are additional accelerators in GAP8

GAP8 is a fully programmable RISC-V IoT-edge computing engine, featuring a 8-core cluster with CNN accelerator, coupled with an ultra-low power MCU with 30 uW state-retentive sleep power. GAP-8 delivers up to 10 GMAC/s for CNN inference (90 MHz, 1.0V) at the energy efficiency of 600 GMAC/s/W within a worst-case power envelope of 75 mW.

Related Publication

• Eric Flamand, Davide Rossi, Francesco Conti, Igor Loi, Antonio Pullini, Florent Rotenberg, Luca Benini, "GAP-8: A RISC-V SoC for AI at the Edge of the IoT", In Proc. IEEE 29th International Conference on Application-specific Systems, Architectures and Processors (ASAP), Milan, Italy, 2018, pp. 1-4,European Solid State Circuits Conference (ESSCIRC) 2018, 3-6 Sep 2018, Dresden, DOI: 10.1109/ASAP.2018.8445101