ImpulseBased Asynchronous Serial Communication Protocol on Optical Fiber Link for AER Systems We developed an ImpulseBased Asynchronous Serial AddressEvent Representation (IBASAER) protocol. It allows for fullduplex communication and explicit flow control, does not require any clock data recovery or accurate clock relationship between the transmitter and receiver. Moreover, the optical fiber communication link, that galvanically isolates the communicating devices, highly improves the robustness to electromagnetic disturbances, reduces the power consumption and allows for high data rate transmissions. In addition, the proposed implementation does not require any specific hardware and can be developed on lowcost FPGAs as well as on fullcustom ASICs. Preliminary tests performed at 100 Mbps raw bit transfer rate confirm a 32 bit maximum event rate of 2.9 Meps.

An Asynchronous AER Circuits with Rotation Priority Tree Arbiter for Neuromorphic Hardware with Analog Neuron At present, the neuromorphic hardware with analog neuron is widely studied by researchers. Address event representation (AER) is an event protocol, which usually used for interchip communication between neuromorphic chips. Fixed priority arbiter often results in unfair allocation of bus resource to only the high priority neuron, thus introducing fixed noise in the neural network. In this paper, we propose an asynchronous AER circuits with rotation priority tree arbiter to alleviate this issue. Moreover, to match the different delay between AERu0027s handshake signal and neuronu0027s handshake signal, a special handshake circuits is designed. Simulation results show that the 64 channels AER circuits can perform up to 143M events. The design is designed with SMIC180 process for fabricating RRAM based neuromorphic chip.