| 摘要 |
PURPOSE:To execute a synchronization of plural pieces of LSIs by monitoring a phase of the respective operation clocks of N pieces of LSIs, based on the operation clock of one piece of LSI as a reference, controlling a supply clock to a tooth-omitted shaped, as for the LSI of a discrepancy phase, and holding for a prescribed period until its LSI is synchronized. CONSTITUTION:N+1 pieces of LSIs 20-2N bring an input clock 101 and supply clocks 1021-102N to frequency division in the inside, respectively, and execute a data processing. A clock phase control circuit 1 supplies the supply clock to all the LSIs 21-2N except one piece of LSI 20, through this circuit, and on the other hand, inputs all of an operation clock 103 and same 1041 - same 104N which are brought to frequency division and formed by all the LSIs 20-2N, to this circuit and monitors them, and controls the supply clocks 1021-102N to the LSIs 21-2N so that all the operation clocks 103, 1041-104N which are brought to frequency division to be formed into the same phase. In such a way, LSIs which can execute a prescribed data processing on the supplied clock by the operation clock which is applied independently with frequency division and has formed, can be synchronized plurality. |
