Testing system, in which DSP is the part of core and CPLD is as peripheral circuit, controls operation parts, and test or incept the digital signal, analog signals and switch signals from exterior.
The periphery output control system is composed of analog peripheral device such as LED, relay, digitalswitch etc, to control the other weak-current devices and general heavy-current devices.
外围输出控制系统由发光二极管、继电器、数字开关等模拟外围设备，控制其它的弱电设备和一般的强电设备。
3
Abstrct: the electrical parameters Tester through AT89C51 SCM as a core element of control by the analogswitch HCF4051 constitute a range digital multimeter.
本电参数测试仪通过AT 89 C 51单片机作为核心的控制元件，由模拟开关hcf 4051构成自动量程数字万用表。