| 摘要 |
PROBLEM TO BE SOLVED: To easily manage a bus by writing a channel number and bus capacity the use of which are started in each of first and second storage means when an idle channel and idle capacity required for performing synchronous communication exist in the contents read by a reading means. SOLUTION: A value (a) of a used channel register REG1 is read by other node 12. When a bit of zero exists in the value (a), a value obtained by defining a bit of a channel which is desired to be used for the synchronous communication as 1 is defined as (b) and the value of the REG1 is rewritten to (b) by other node 12. An instruction to rewrite the value of the register REG1 to (b) is transmitted to a bus management node 11 by a node by which a channel is desired to be taken. Next, a value (c) of a bus capacitance register REG2 is read by other node 12. When the value (c) is larger than a bas capacitance to be newly used, a value obtained by subtracting the capacitance desired to be used is defined as (d) and the value of the REG2 is rewritten to (d) by other node 12. |
