in regard to its hardware the system configuration and circuit principle diagram based on ac48304c-c chip are given in the paper and in software the oo modularization technique is adopted.
研制时,在硬件方面,对基于ac48304c-c核心芯片的系统结构及其电路原理图进行了设计;
the types of the keyboards are expatiated on. system hard ware electric circuit principle diagram is depicted, and programs are debugged in the ccs software.