INDIRECT ACCESS CONTROL SYSTEM

摘要

PURPOSE:To access indirectly registers for many times in a short time by adding an automatic updating mechanism to an indirect address register of a subprocessor group when a main processor accesses a subprocessor. CONSTITUTION:When a main processor 1 accesses a subprocessor 2 through a common bus 3, an automatic updating mechanism 2-6 counts up an indirect address to update it and outputs the set clock of an indirect data (iDD) register 2-5 by the access to the iDD register 2-5. The automatic updating mechanism 2-6 counts up automatically the indirect address after the indirect address is set to the mechanism 2-6 once, and continuous access is performed with one indirect address setting.