| 摘要 |
PROBLEM TO BE SOLVED: To perform memory check from both systems before starting the operation of one system in a system where the one system is started to operate on the basis of data inputted from the other system through a dual port RAM. SOLUTION: When the power is supplied to a device system, an FPGA 10 is started together with a CPU 1 and automatically performs memory check of a DP-RAM 2 from a DSP 3 side according to a predetermined program. Even though the DSP 3 can not perform memory check of the DP-RAM 2 from the DSP 3 side before downloading the program from the CPU 1 because the DSP 3 is in a wait state in which the DSP 3 has not read the program yet, the DSP 3 can perform memory check from the DSP 3 side of the DP-RAM 2 by the FPGA 10.
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