Table 1 Characteristics of the presented SC neuromorphic system. Technology Global foundries 28 nm SLP Layout area for system 460*430 μm2 neuromorphic comp., 600*600 μm2 overall (including DAC, RAM, etc.) Clock frequency 330 MHz (PLL), 3.3 MHz (neuromorphic components) VDD analog 1.0 V VDD digital 0.75 V Power digital 1.1 mW (speed-up 1) to 3.1 mW (speed-up 100) Power analog (neuromorphic components) 0.38 mW (speed-up 1) to 11.0 mW (speed-up 100) Power analog (PLL) 0.45 mW Neuron model LIAF (Rolls and Deco, 2010) Presynaptic adaptation Facilitation and depression (Noack et al., 2012) Synaptic plasticity Stochastic synapse with stop learning (Brader et al., 2007) System characteristics 128 presynaptic adaptation circuits, 8192 stochastic synapses, 64 LIAF neurons All figures are for a speed-up of one, i.e., biological real time operation, if not stated otherwise.