| 摘要 |
PROBLEM TO BE SOLVED: To provide a program writing circuit to a dual-port RAM, in which the number of components is reduced with a simplified bus switching circuit, and the address space of a CPU is not occupied by a bit arithmetic processor RAM area. SOLUTION: Output of a program counter 2 of a bit arithmetic processor is inputted to the address of a dual port RAM 1. When the CPU accesses the dual port RAM 1, the address of the dual port RAM seen from the bit arithmetic processor is written to the program counter 2. COPYRIGHT: (C)2007,JPO&INPIT
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