| 摘要 |
<p>PURPOSE:To prevent the dispersion of signals in circuits from occurring by connecting an LS245 wired so as to keep the minimum distance to three port buses of an LSI8255(8255) for interface I/O. CONSTITUTION:An arbitrary port address is set at an expansion slot bus 1, and the LSI8255 is connected to it. The buffer reinforcement of each port bus can be performed by wiring the LS245(3-5) so as to keep the minimum distance from each port bus of the three ports A, B, and C provided at the LSI8255(2). Thereby, the dispersion of the signal generated in the conventional circuit of 8255 can be eliminated.</p> |
