基于ST公司的str710芯片的DV710开发板。通过按动K1、K2、K3分别点亮三3个通用LED指示灯。按键松开时相应LED熄灭。-based company str710 chip DV710 Development Board. By pressing the K1, K2, K3 were lit three three generic LED indicator. Keys splayed out at the corresponding LED.