| 摘要 |
PURPOSE:To prevent missing of control information by processing the information with an interruption terminal impossible for mask when the control information is transmitted/received with an external device via a microprocessor. CONSTITUTION:The control information between the microprocessor 1 and a communication controller 5 is transmitted and received all in the unit of words and the fetch/transmission of the control information by the microprocessor 1 is processed by a corresponding processing routine through the unmasked interruption from an interruption terminal 6 not masked. On the other hand, in peripheral interface adoptors 3-1-3-N connecting a synchronism control section 4 and the microprocessor 1, the corresponding processing routine is started by transmitting an IRQ interruption via an IRQ interruption terminal 7 so as to attain the processing respectively.
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