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一种可编程的全数字锁相环路的实现


use ieee.std_logic_unsigned.all;

entity count_zj is

port(clkl,j,Kd,Kc,Kb,Ka,en:in std_logic;

INC,DEC:out std_logic);

End count_zj;

architecture behave Of eonnt_zj is

signal cq,k,mo

,k2,mo2,cql:std_logic_vector(16 downto 0);

signal caol,cao2,caoll,cao22,caolll,cao222:std_logic;

signal instruction,aa,q1,q2:std_lOgic_vector(3 downto 0);

begin

instruction<=Kd & Kc & Kb & Ka;

aa<=instruction+1;

with instruction select

mo<=“00000000000000111”when“0001”,

“0000000000000t111”when“0010”,

“000(0)0(000~11111”when“0011”,

“00000000000111111”when“0100”,

“00000000001111111”when“0101”,

“00000000011111111”when“0110”,

“00000000111111111”when“0111”,

“00000001111111111”when“1000”,

“00000011111111111”when“1001”,

“00000111111111111”when“1010”,

“00001111111111111”when“1011”,

“00011111111111111”when“1100”,

“00111111111111111”when“1101”,

“01111111111111111”when“1110”,

“11111111111111111”when“1111”,

“00000000000000111”when others;

with aa select

m02<=“00000000000000111”when“0001”,

“00000000000001111”when“0010”,

“00000000000011111”when“0011”,

“00000000000111111”when“0100”,

《一种可编程的全数字锁相环路的实现(第2页)》
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