sp09-sw-s3

# sp09-sw-s3 - ECE 2030 A 10:00am 4 problems 4 pages Problem...

This preview shows pages 1–3. Sign up to view the full content.

ECE 2030 A 10:00am Computer Engineering Spring 2009 4 problems, 4 pages Exam Three Solutions 8 April 2009 1 Problem 1 (2 parts, 24 points) Counters Part A (12 points) Design a toggle cell using transparent latches and basic gates. Use an icon for the latch. Your toggle cell should have an active high toggle enable input TE , and an active low clear input CLR ¯¯¯ , clock inputs Φ 1 and Φ 2 , and an output Out . The CLR ¯¯¯ signal has precedence over TE . Label all signals. Also complete the behavior table for the toggle cell. In Out En Latch In Out En Latch TE Out CLR Φ 1 Φ 2 TE CLR ¯¯¯ CLK Out 0 0 ↑↓ 0 1 0 ↑↓ 0 0 1 ↑↓ Q o 1 1 ↑↓ Q o ¯¯ Part B (12 points) Now combine these toggle cells to build a divide by six counter. Your counter should have an external clear, external count enable, and three count outputs O 2 , O 1 , O 0 . Use any basic gates (AND, OR, NAND, NOR, & NOT) you require. Assume clock inputs to the toggle cells are already connected. Your design should support multi-digit systems . O 0 O 1 O 2 Ext Clr Ext CE TE Out Clr TE Out Clr TE Out Clr

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
ECE 2030 A 10:00am Computer Engineering Spring 2009 4 problems, 4 pages Exam Three Solutions 8 April 2009 2 Problem 2 (2 parts, 18 points) Datapath Elements Part A (9 points) Consider the following input and output values for a shift operation. Determine
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 08/23/2010 for the course EE 2030 taught by Professor Wills during the Spring '10 term at Georgia Tech.

### Page1 / 4

sp09-sw-s3 - ECE 2030 A 10:00am 4 problems 4 pages Problem...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online