📄 移位寄存器_ttl164.vhd
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--TTL164 Shift RegisterENTITY dev164 ISPORT(a, b, nclr, clock : IN BIT;q : BUFFER BIT_VECTOR(0 TO 7));END dev164;ARCHITECTURE version1 OF dev164 ISBEGINPROCESS(a,b,nclr,clock)BEGINIF nclr = '0' THENq <= "00000000";ELSEIF clock'EVENT AND clock = '1'THENFOR i IN q'RANGE LOOPIF i = 0 THEN q(i) <= (a AND b);ELSEq(i) <= q(i-1);END IF;END LOOP;END IF;END IF;END PROCESS;END version1;
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