| 摘要 |
<p>PURPOSE:To attain the initial setting without changing an aluminum mask, etc. individually by initializing each part after reading out the initial setting information out of an ROM during a reset period. CONSTITUTION:An initial setting instruction is written on a specific address simultaneously with program writing on an ROM2. When a signal (i) is applied to a reset terminal 11, a program counter 63 is reset. Then the initial setting instruction of the ROM2 is supplied to an instruction register 61 through an internal bus 9. Thus a T/C part 62 including an instruction decoder receives said initial setting instruction and delivers a set signal (b) or a reset signal (c) to an output port 51 and a signal (e) showing the presence of the pull-up resistance or a signal (f) showing the absence of the pull-up resistance to an input port 54 respectively for initialization of both ports.</p> |
