新型的键盘显示芯片——SK5279A的应用

Application of New-style Chip SK5279A For Keyboard Control and Display

介绍一种新型的键盘显示控制芯片———SK5 2 79A .SK5 2 79A是一种具有串行接口 ,可同时驱动 8位共阴式数码管 (或 6 4只独立的LED)的单片显示驱动芯片 ,它内部带有译码器 ,具备两种译码方式 ,可直接接收 16进制码 ,通过软件控制可选择两种译码方式的一种或不译码。此芯片还具有多种控制指令 ,如显示位数限制、闪烁、左移、右移、段寻址等。SK5 2 79A除具有上述功能外 ,还可连接多达 6 4键的键盘矩阵 ,可给出键盘有效信号 ,并可直接输出键值。其结构简单 ,编程灵活 ,可广泛应用于仪器仪表、控制面板等场合。本文将结合实际 ,具体阐述其应用。

In this paper,a new-kind intelligent chip named SK5279A for keyboard and display manager is presented.It has serial inteface and can drive 8 digital common-cathode LED displays,or 64 individual LEDs.There is a decoder inside it and two decoded display modes can be used.One of the two decoded display modes or non-decpded display mode can be chosen by programmed instruction. The chip also has many other control instructions. They can control the mumber of LEDs which are to be shown.The glint attribute can be determined by specific instruction,also the shift attribute,including left round shift and right round shift.Besides these functions which have been mentioned above,the chip also interfaces keyboard matrix of up to keys.If one of the 64 keys is pressed,a valid signal can be given,and the key-value can be gotten directly.It has simple configuration and it can be progranned easily.The chip can be used extensively in instrumentation, control panel and so on.In this paper,its paper,its typical application well be given,such as the hardware interface scheme and flow chart of the programn.