系统由AT89S52、74LS244、74LS373、八位一体数码管等部分构成，能进行时、分、秒的显示，也具有时钟校准。

System from AT89S52, 74LS244, 74LS373, eight of integrated digital and other parts, capable of hours, minutes and seconds of the show, also has clock.

youdao

系统由AT89S52、74LS244、74LS373、八位一体数码管等部分构成，能进行时、分、秒的显示，也具有时钟校准。

System from AT89S52, 74LS244, 74LS373, eight of integrated digital and other parts, capable of hours, minutes and seconds of the show, also has clock.

youdao