SENNA: An Ultra-Low Latency, Time-Deterministic Field-Programmable-Spiking-Neuron-Array (FPSNA)

SENNA is a first-of-its-kind mixed-signal circuitswitched field-programmable accelerator for Spiking Neural Networks (SNNs). We demonstrate a 1024-neuron and 25.6k synapse proof-of-concept chip in 22 nm FDSOI that achieves 687 fJ energy per synaptic operation (E/SOP) at 25 MHz and 23 mW. The IC allows a very flexible configuration of parallel processed SNNs. Due to its low power draw, low spike-in-spikeout (SISO) latency of 40 ns and time-deterministic response, this design is particularly promising for real-time edge applications.