h_2:OUT INTEGER RANGE 0 TO 9; m_1,s_1:OUT INTEGER RANGE 0 TO 9; m_2,s_2:OUT INTEGER RANGE 0 TO 9;

flag:OUT INTEGER RANGE 0 TO 1;--倒计时结束标志 choice_tmp:IN INTEGER RANGE 0 TO 2); END COMPONENT;

COMPONENT set_sure PORT(

sure,clk_100:IN STD_LOGIC;--sure是数字钟模式下的确认按钮

sure_tmp:OUT STD_LOGIC );

END COMPONENT;

COMPONENT clk_div PORT(

clear,clk:IN STD_LOGIC;

clk_500,clk_1,clk_100:OUT STD_LOGIC );

END COMPONENT;