Spiking neural P system is proposed based on the biological phenomenon that the neurons in the neural network are processed by synapses. It has good performance and potential application value. Spiking neural P system working in sequential mode induced by minimum spike number is a special kind of spiking neural computational models. In order to verify the universality of the homogeneous system

weighted synapses are introduced

and the homogeneous spiking neural P systems working in sequential mode induced by minimum spike number are constructed. It is proved that such systems are universal as both generative and acceptive devices by using automata theory

formal language and register machines.