| 摘要 |
PURPOSE: A cell bus arbitrator automatic transfer apparatus in the FLC-C(Fiber Loop Carrier-Curb) system is provided to perform automatic transfer to other cell bus arbitrator, in case that an error is generated in a cell bus arbitrator which arbitrates a cell bus usage between each of the function boards sharing the cell bus in the FLC-C system. CONSTITUTION: A cell bus arbitrator automatic transfer apparatus(400) is composed of a D flip-flop(410), an OR gate(421) and an enable ready register(430). To the clear terminal of the D flip-flop(410), an arbitrator enable signal is inputted from a bit of a control register(320). To the preset terminal of the D flip-flop(410), a signal having a counter value of the value of the arbitrator enable signal and an OR enable ready signal are inputted. The enable ready register(430) is controlled by a main control unit(250) and stores the bit values corresponding to optical transmit-receive units. The output terminal of the D flip-flop(410) is connected to the arbitrator enable signal input terminal of a cell bus arbitrator(311). |
