1. Neuromorphic synapse apparatus comprising: a memelement for storing a synaptic weight, the memelement being adapted to exhibit a desired programming characteristic; and programming logic, responsive to a stimulus prompting update of the synaptic weight, for generating a programming signal for programming the memelement to update said weight; wherein the programming logic is adapted such that the programming signals exploit said programming characteristic to provide a desired weight-dependent synaptic update efficacy.