Assess controlling system for bus of internal integrated circuit

It is a kind of bus access control system of interior integrated circuit. Wherein the CPU communicates with equipments through interior integrated circuit (I#+[2]C) bus. For the equipment that with the same I#+[2]C bus address, it can be divided to some groups. The equipments in the same group connect with each other by SDA. The equipments in each group connect to several SCLs respectively. The CPU configures the register, so to control the on off of SCL of each equipment by the tri-state driver in logic device and control the on off of SDA of each equipment by the simulation switch. When the SCL and SDA are on simultaneously, CPU can access the equipment. This cheap, reliable, simple bus access control system can realize unique hit access of one of the equipments that with the same I#+[2]C bus address on single board.