libraryieee, useleee.s std_ logic_1164. all; use ieeestd_logic_unsigned.all; entity mchange_1 is port(clk, clrin std_logic, m: inintegerrange0 to 99; g: bufferinteger range0 to 99) end mchange_1; architecture one of mchange_l is signal md: integer; egin process(clr, clk, m) egin md<=m-1 if clr=1then q <=“0 elsifclk event and clk=1then if q=md then q<= 0 else q<=q+1 end if; nd if: eny end process; d
library ieee; use ieee.std_logic_1164.all; use ieee.std_logic_unsigned.all; entity mchange_1 is port(clk, clr:in std_logic; m: in integer range 0 to 99; q: buffer integer range 0 to 99); end mchange_1; architecture one of mchange_1 is signal md: integer; begin process(clr,clk,m) begin md<=m-1; if clr=‘1’ then q<=‘0’; elsif clk’event and clk=‘1’ then if q=md then q<=‘0’; else q<=q+1; end if; end if; end process; end one;
(2)有置数端的可变模计数器 mchange100 clk-时钟 clk clr-清零端 q[6…0 ld-置数端 ld m[6…0]一模值输入端 [6…0 有置数端的可变模计数器的电路符号
(2)有置数端的可变模计数器 有置数端的可变模计数器的电路符号 mchange100 clk q[6…0] clr m[6…0] clk –时钟 clr – 清零端 m[6…0] – 模值输入端 ld ld – 置数端
use ieee std_logic_1164.all; use ieee std _logic_unsigned.all; entity mchange 1 port(clk, clr, ld:in std logic; m: in integer range0 to 99 g: bufferinteger range0 to 99) end mchange_1 architecture one of mchange_1 is signalmd: integer; egin process( clr, clk m) b d<=m-1; if cIr= 1 then g<=0; elsif clk event and clk=1 then fld=‘1’ then q<=m elsif q=md then q<=0; seq<=q+1; d if en end proces end one:
library ieee; use ieee.std_logic_1164.all; use ieee.std_logic_unsigned.all; entity mchange_1 is port(clk, clr, ld:in std_logic; m: in integer range 0 to 99; q: buffer integer range 0 to 99); end mchange_1; architecture one of mchange_1 is signal md: integer; begin process(clr,clk,m) begin md<=m-1; if clr=‘1’ then q<=0; elsif clk’event and clk=‘1’ then if ld=‘1’ then q<=m; elsif q=md then q<=0; else q<=q+1; end if; end if; end process; end one;