Abstract: A convolution circuit includes a buffer memory and a computation circuit. The computation circuit receives an input element according to a memory access sequence, and determines whether a filter location corresponding to each weight of a weight matrix is within an operation range. For each weight within the operation range, the computation circuit calculates an index of the buffer memory, reads a temporary value located at the index, multiply the input element and the weight to obtain a product, and accumulate the product to the temporary value. If accumulation times of the temporary value meet a predetermined number of times, the temporary value is output. If the accumulation times do not meet the predetermined number of times, the temporary value is stored back into the buffer memory.