20 q dc c q dc master slave sr flip flop m a ste r s

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: lo c k ) (a ) C M a s te r S la v e S R Q M g a te d h o ld h o ld g a te d g a te d h o ld h o ld g a te d g a te d h o ld h o ld g a te d g a te d h o ld h o ld g a te d S and R m ay not change R S C tsu (s e tu p ) th (h o ld ) tw C lo w p u lse w id th ( m a s te r e n a b le d ) tw C h ig h p u ls e w id th ( s la v e e n a b le d ) (d ) Q F lip -flo p o u tp u t c a n c h a n g e (c ) Figure 6.20 SR Master-Slave Flip-Flop Characteristics S 0 0 0 0 1 1 1 1 R 0 0 1 1 0 0 1 1 Q 0 1 0 1 0 1 0 1 C Q* 0 1 0 0 1 1 N o change R eset 0 Set 01 (b ) 0d SR 10 1 0d × N o t a llo w e d × (a ) Figure 6.22 Q* = S + R′ Q Master-Slave D Flip-Flop M a ste r D D Q Q M S la v e D Q Q D Q C Q C Q Q C Q C (c lo c k ) (a ) (b ) Figure 6.23 Master-Slave D Flip-Flop Characteristics D 0 0 1 1 Q 0 1 0 1 (a ) C Q* 0 0 1 1 S to r e 0 S to r e 1 0 0 0 (b ) D 1 1 1 E n a b le d : C D Q Q=Q M S M S M S M S M M S (c) Figure 6.24 Q* = D Pulse-Triggered JK Flip-Flop Characteristics 0d 0 H o ld R eset S et T o g g le Q 1 1 0 K (c) 0 1 Q 0 JK 00 0 01 0 11 1 d1 (b ) J 10 1 JR 1d J 0 0 0 0...
View Full Document

Ask a homework question - tutors are online