freque.pcf

本实例是学习fpga的入门程序 希望大家喜欢

//! **************************************************************************
// Written by: Map J.30 on Tue May 05 19:51:07 2009
//! **************************************************************************

SCHEMATIC START;
COMP "RST_N" LOCATE = SITE "P78" LEVEL 1;
COMP "FREQUECEIN" LOCATE = SITE "P90" LEVEL 1;
COMP "HC_CP" LOCATE = SITE "P97" LEVEL 1;
COMP "HC_SI" LOCATE = SITE "P96" LEVEL 1;
COMP "CLK" LOCATE = SITE "P76" LEVEL 1;
TIMEGRP clk200hztop_CLK2X_BUF = BEL "periode0" BEL "periode1" BEL
        "fre_count_4" BEL "fre_count_5" BEL "fre_count_6" BEL "fre_count_7"
        BEL "fre_count_8" BEL "fre_count_9" BEL "fre_count_10" BEL
        "fre_count_11" BEL "fre_count_12" BEL "fre_count_13" BEL
        "fre_count_14" BEL "fre_count_15" BEL "fre_count_16" BEL
        "fre_count_17" BEL "fre_count_18" BEL "fre_count_19" BEL
        "fre_count_20" BEL "fre_count_21" BEL "fre_count_22" BEL
        "fre_count_23" BEL "fre_temp_0" BEL "fre_temp_1" BEL "fre_temp_2" BEL
        "fre_temp_3" BEL "fre_temp_4" BEL "fre_temp_5" BEL "fre_temp_6" BEL
        "fre_temp_7" BEL "fre_temp_8" BEL "fre_temp_9" BEL "fre_temp_10" BEL
        "fre_temp_11" BEL "fre_temp_12" BEL "fre_temp_13" BEL "fre_temp_14"
        BEL "fre_temp_15" BEL "fre_temp_16" BEL "fre_temp_17" BEL
        "fre_temp_18" BEL "fre_temp_19" BEL "fre_temp_20" BEL "fre_temp_21"
        BEL "fre_temp_22" BEL "fre_temp_23" BEL "periode0_1";
TIMEGRP clk200hztop_CLK0_BUF = BEL "hc_ledtop/hc_cp" BEL "display_cnt_0" BEL
        "display_cnt_1" BEL "display_cnt_2" BEL "display_cnt_3" BEL
        "display_cnt_4" BEL "display_cnt_5" BEL "display_cnt_6" BEL
        "display_cnt_7" BEL "display_cnt_8" BEL "display_cnt_9" BEL
        "display_cnt_10" BEL "display_cnt_11" BEL "display_cnt_12" BEL
        "display_cnt_13" BEL "display_cnt_14" BEL "display_cnt_15" BEL
        "display_cnt_16" BEL "display_cnt_17" BEL "display_cnt_18" BEL
        "display_cnt_19" BEL "display_cnt_20" BEL "display_cnt_21" BEL
        "hc_ledtop/en_temp_0" BEL "hc_ledtop/en_temp_1" BEL
        "hc_ledtop/cnt_tx_0" BEL "hc_ledtop/cnt_tx_1" BEL "hc_ledtop/cnt_tx_2"
        BEL "hc_ledtop/cnt_tx_3" BEL "hc_ledtop/cnt_tx_4" BEL
        "hc_ledtop/cnt_tx_5";
PIN clk200hztop/DCM_INST_pins<10> = BEL "clk200hztop/DCM_INST" PINNAME CLKIN;
TIMEGRP CLK = PIN "clk200hztop/DCM_INST_pins<10>";
TS_CLK = PERIOD TIMEGRP "CLK" 20 ns HIGH 50%;
TS_clk200hztop_CLK0_BUF = PERIOD TIMEGRP "clk200hztop_CLK0_BUF" TS_CLK HIGH
        50%;
TS_clk200hztop_CLK2X_BUF = PERIOD TIMEGRP "clk200hztop_CLK2X_BUF" TS_CLK / 2
        HIGH 50%;
SCHEMATIC END;