In the instrument timer 555 is used to determine the charge time of capacity parasitizing in broken cable and dual MCU is used to replace the using of universal keyboard interface element 8279 to reduce cost and to expand input and output port .

测试装置采用555定时器测量断线的电容的充电时间，采用双MCU的电路结构代替使用健盘 通用接口模块 8279，达到降低成本和扩充输入输出口线的目的。

Among the electronic products keyboard is the most basic input device . However it is unpractical to entirely adopt the universal keyboard-scan chip during the application and it is required to singly design it to a special keyboard .

在电子产品中，键盘是最基本的输入设备，然而在应用中都采用 通用的键盘扫描器件是不现实的，需要单独设计成专用的小 键盘。

A Universal Interface Used at Keyboard and Display

通用 的 键盘和数显接口

The design of software is finished based on the completed design of universal hardware platform including signal source module terminal module modulation module demodulation module controller module and LCD / keyboard module .

在完成 通用硬件平台设计的基础上，完成了实验系统的软件设计，包括信号源模块、终端模块、调制模块、解调模块、控制器及液晶 键盘模块共六部分。

The test method for universal keyboard chinese Character input skill

GB/T16295-1996 通用 键盘汉字输入技能测试方法

The evaluation rule for universal keyboard Chinese character coding input method

GB/T14159-1993 通用 键盘汉字编码输入方法评测规则

Electrostatic Protection of ECG Tester 's Universal Serial Keyboard

心电图测试仪 通用串行 键盘的静电防护