说明：  驱动共阴LED数码屏做时钟显示，可由按键控制时钟暂停，开始，停止以及显示0-9数字
(1628 is an LED Controller driven on a 1/7 to 1.-/8 duty factor. Eleven segment output lines, six grid output lines, 1 segment/grid output lines, one display memory, control circuit, key scan circuit are all incorporated ito a single chip to build a highly reliable peripheral device for a single chip microcomputer.)