Roller arbitration method and circuit for on-chip data exchange

The invention discloses a roller arbitration method for on-chip data exchange, which is based on an N * N cross network with N input ports and N output ports, and comprises the following steps: S1, determining a priority arbitration arrangement; S2, judging whether each expected transmission pair in the arrangement has a transmission demand or not, if so, determining the expected transmission pair as an actual transmission pair, and immediately performing data transmission by using the determined actual transmission pair; otherwise, determining the transmission pair as a non-transmission pair; S3, performing sequential row/column or column/row arbitration, and selecting an exchange point with high priority as an actual transmission pair; S4, after the polling in the step S3 is completed, rolling the priority arbitration arrangement to obtain a new arbitration arrangement; and S5, circularly carrying out the steps S2-S4. According to the method, the on-chip data exchange efficiency and speed can be improved, a