| 摘要 |
A technology for allowing easy handling of a change in the address range of the subject of access or any of bus masters is provided. There is provided an address monitor unit including a table which is shared among a plurality of bus masters and stores therein access right information that has been preset in correspondence to the subject of access and to address information corresponding thereto and capable of determining, by referencing the table, the presence or absence of an access right for each of the bus masters based on the subject-of-access information of each of the bus masters and on address information outputted from the bus master. Since the table is shared among the plurality of bus masters, when the address range of the subject of access or any of the bus masters is changed, the table may be rewritten appropriately. This allows, when a plurality of bus masters are connected to a common bus, easy handling of a change in the address range of the subject of access or any of the bus masters.
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