CH7117集成电路是3位半的双积分式 A/D 转换器,具有单片化、精度高、能直接驱动3位半 LED显示器等优点,但是它无数据输出口。尽管如此,计算机对 CH7117进行数据采集还是可以通过间接方法来实现。本文将介绍利用 CH7117输出的 LED 笔段驱动信号和计算机软件实现的计算机对 CH7117的数据采集。图1是 TP801单板机与 CH7117的连接线路。单板机 PIO 电路的 A 口作为数据输入口,输入 The CH7117 IC is a 3½-bit, dual-integrated A / D converter that has the advantage of being monolithic, high precision, and capable of directly driving a 3-digit half-width LED display. However, it has no data output port. However, computer data acquisition CH7117 can still be achieved through indirect methods. This article will introduce the use of CH7117 output LED pen drive signal and the computer software to achieve computer data acquisition CH7117. Figure 1 is TP801 single board machine and CH7117 connection lines. Board A port PIO circuit as a data input port