READ ACCESS CONTROL DEVICE AND CONTROL METHOD FOR THE SAME

PROBLEM TO BE SOLVED: To reduce a circuit scale, and to accurately perform read access to a reading object.SOLUTION: A read address control device includes: an output data correction unit 102 for correcting data on a current address which is data output by current read access from a register 201 being a reading object as necessary and outputting it to an engine CPU 12; an output data storage unit 103 for storing output data transmitted from the output data correction unit 102 until the next output data are transmitted from the output data correction unit 102; and a carry determination unit 104 for comparing pre-one access data which is data on an address accessed before one read access from the register 201 with stored data which is the data from the output data storage unit 103, and for determining the presence or absence of carry on the basis of the comparison result. The output data correction unit 102 performs one decrement to the data on the current address when it is determined that there is carry by the carry determination unit 104.