METHOD FOR PROVIDING ARBITRATION ON MULTIPOINT FAST SERIAL BUS AND ARBITRATION CONTROLLER THAT PERFORMS ARBITRATION

摘要

PROBLEM TO BE SOLVED: To remove all unstable output state of drivers as to arbitration control over a fast serial bus. ;SOLUTION: Respective drivers 58 have data input pins, output enable pins, and output pins. When outputs of more than one driver are set to high impedance, the multipoint fast serial bus 60 enters a 1st state as a default state. The arbitration controller 50 controls input signals to the drivers to remove all unstable output states of the drivers. The controller 50 when detecting the bus 60 being in arbitration mode inputs data to the output enable pins and the reverse state of the 1st state to the data input pins. Further, the controller 50 when detecting the bus being in data mode inputs the data to the data input pins and a driver control signal to the output enable pins.;COPYRIGHT: (C)1998,JPO