Digital Lecture 14 - 17-Feb-064:36 PM Registers, ALU,...

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17-Feb-06—4:36 PM 1 1 University of Florida, EEL 3701 – File 14 © Drs. Schwartz & Arroyo Registers, ALU, Asynch, Synch EEL 3701 1 University of Florida, EEL 3701 – File 14 © Drs. Schwartz & Arroyo EEL 3701 Menu • Registers >Storage Registers >Shift Registers • More LSI Components >Arithmetic-Logic Units (ALUs) > Carry-Look-Ahead Circuitry ( skip this ) • Asynchronous versus Synchronous Look into my . .. EEL 3701 2 University of Florida, EEL 3701 – File 14 © Drs. Schwartz & Arroyo EEL 3701 •Q + =D •Q + =TQ' + T'Q •Q + =S + R' Q QQ + DTSR JK 000 0 0 X 0 X 011 1 1 0 1 X 100 1 0 1 X 1 111 0 X 0 X 0 Excitation Tables (Bonus Slide) •Q + =J Q' + K' Q
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17-Feb-06—4:36 PM 2 2 University of Florida, EEL 3701 – File 14 © Drs. Schwartz & Arroyo Registers, ALU, Asynch, Synch EEL 3701 3 University of Florida, EEL 3701 – File 14 © Drs. Schwartz & Arroyo EEL 3701 Registers A Storage Register n n D O CLK CLR See also Lam Fig 5.24 (on next several pages), Mano Fig 5.1 Commercially available models 74’273, 74’378, 74’163 A register is a device that conceptually performs the functions: LOAD, READ, DO NOTHING, DISABLE We can think of them as a bank of n D-FFs. n n CLK READ n n LOAD n D Q Q A collection of A collection of FFs FFs designed designed to work as a unit (in parallel). to work as a unit (in parallel). EEL 3701 4 University of Florida, EEL 3701 – File 14 © Drs. Schwartz & Arroyo EEL 3701 8-bit Storage Register with Master Reset (74’273) The 74’573 is the same circuit with a different pinout Lam Fig 5.24
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17-Feb-06—4:36 PM 3 3 University of Florida, EEL 3701 – File 14 © Drs. Schwartz & Arroyo Registers, ALU, Asynch, Synch EEL 3701 5 University of Florida, EEL 3701 – File 14 © Drs. Schwartz & Arroyo EEL 3701 6-bit Storage Register with Enable (74’378) Lam Fig 5.24 EEL 3701 6 University of Florida, EEL 3701 – File 14 © Drs. Schwartz & Arroyo EEL 3701 4-bit Storage Register Using a Counter (74’163) Lam Fig 5.24
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This note was uploaded on 09/11/2008 for the course EEL 3701c taught by Professor Gugel during the Spring '05 term at University of Florida.

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Digital Lecture 14 - 17-Feb-064:36 PM Registers, ALU,...

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