| 摘要 |
<p>PURPOSE:To use a memory in common by a simple constitution by supplying a clock whose phase is different to each processor, and supplying an address applied to the memory from each processor, to an address selector as a time division. CONSTITUTION:Plural microprocessors PRO1, PRO2 are connected by a data bus DB, and a program memory P-ROM used in common is connected to this bus DB. A clock is supplied directly as clock CLK1 to a CPU1 of this PRO1, and a CLK2 inverted by an invertor INV is supplied to a CPU2 of the other PRO2. Address signals AD1, AD2 from these respective CPU1, CPU2 are applied to a selector SEL through address buses ADB1, ADB2. Subsequently, the signals AD1, AD2 are selected by the selector SEL, applied as an address signal ADM as a time division to the P-ROM, and the P-ROM is used in common by a simple constitution.</p> |
