| 摘要 |
PROBLEM TO BE SOLVED: To simplify the control of an internal bus and to reduce the scale and cost of a data processor by performing a process while carrying out the input/output of data in real time to a 1st external device via a 1st interface circuit and also performing a process while carrying out the input/output of data in non-real time to a 2nd external device via a 2nd interface circuit and under the control of a data transfer line control circuit. SOLUTION: Each of processing elements 143 carries out its process while performing the input/output of data in real time with image data processing circuit 21 via the external terminal 146a of a system I/F circuit 146. Each of the elements 143 also inputs the data to be used for its process from each of FIFO circuits 144 and uses these data to perform the process in non-real time. In regard to the reading operation of a main memory 20 under such conditions, the data which are read out of the memory 20 are outputted to the circuit 144 via an external terminal 145a and an internal bus 147 and under the control of an internal bus controller 142.
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